United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9805190074





                              The Boeing Company

                              P.O.  Box 3707

                              Seattle, WA 98124-2207



April 30, 1998

G-1151-SJA-98-213



Document Control Desk

United States Nuclear Regulatory Commission

Washington, D.C. 20555



Reference:     a)   Boeing Letter G-1151-RSO-92-365 dated August 31,

                    1992; R. S. Orr to the NRC Operations Center

BOEING

               b)   NRC Letter Docket No. 99901227 dated August 12, 1992;

                    L. J. Norrholm to R. S. Orr; Subject: Response to 10

                    CFR 21 Inquiry



Dear Sir or Madam:



In accordance with the reference correspondence and 10 CFR 21, Boeing is

sending the NRC the attached error notice(s) received from our former

software suppliers.  Because of unknown current addresses, the following

former customers were not notified:



     Reactor Controls, Inc.



     Echo Energy Consultants, Inc.



     Nuclear Applications and Systems Analysis Company (Japan)



     Nuclear Power Services



Error notices have been sent to our other former customers.



Very truly yours,



Sandra J. Andrews

Nuclear Administrator

Phone: (425) 865-6248

FAX: (425) 865-4851

Mail Stop: 7A-33, or

e-mail: Sandra.J.Andrews@Boeing.com



Enclosure(s):  ANSYS Class 3 Error Reports 98-01 thru 98-12 ;95-07 R2,

               97-50 R1 and 98-01 R1.

               ANSYS QA Notices QA 98-01 thru QA98-06

               ANSYS Support Coordinator Bulletins SCB 98-01

               and SCB 98-02



ANSYS [REGISTERED COPY]       ANSYS, Inc.

                              Southpointe

                              275 Technology Drive

                              Canonsburg, PA 15317     APR 29 1998



                             April 13, 1998



Dear Class3 Error Recipient:



Enclosed you will find ANSYS Class3 Error Reports 98-01 through 98-12 as

well as 95-07 R2, 97-50 R1 and 98-01 R1, ANSYS QA Notices QA98-01 through

QA98-06, and ANSYS Support Coordinator Bulletins SCB 98-01 and SCB 98-02.

These reports have been issued in the first quarter of 1998.



Also included with this Class3 Error mailing are two separate letters.

One letter announces the availability of our Interim Product Releases.

The second letter discusses the Hardware and System Support which will be

available with the release of ANSYS 5.5.



Revised Class3 Error Reports

o    Class3 Error Report 95-07 R2 has been issued to clarify the version

     of ANSYSPro/ENGINEER the error was corrected in and give the

     sequence of commands for the workaround.



o    Class3 Error Report 97-50 R1 has been issued to give a more complete

     description of the VMESH error.

o    Class3 Error Report 98-01 R1 has been issued to expand the scope of

     the error.  This error affects all target nodes, not just boundary

     conditions at target nodes.



QA Notices

o    QA Notices QA98-01 and QA98-02 have been issued to inform users of

     possible inaccurate results when using second-order triangular

     thermal elements and 3D 10-Node Tetrahedral Thermal Solid and

     Tetrahedral Coupled-Field Solid elements.  However, these elements

     behave as documented in our Elements Manual.

o    QA Notice QA98-03 discusses the operation of the GET command for

     large deflection analysis.

o    QA Notice QA98-04 has been issued to inform users of a possible

     input error for dialog box settings of keyopts greater than 9.

o    QA Notice QA98-05 has been issued to alert users that Revision 5.0

     of ANSYS and all prior releases will not run after December 31,

     1999.

o    QA Notice QA98-06 has been issued to alert users of an ANSYS 5.4

     Interim Release (UP19980310).



Support Coordinator Bulletins



o    ANSYS Support Coordinator Bulletin SCB 98-01 has been issued to

     inform users of the existence of an undocumented form of the MP

     command with Lab = EMIS and prevent potential confusion or misuse

     when generating a radiation matrix in AUX 12.

o    ANSYS Support Coordinator Bulletin SCB 98-02 has been issued to

     inform users of an occasional and apparently random error occurring

     on the Sun version of ANSYS Release 5.4 which causes ANSYS to run

     indefinitely.



I would like to remind you of the various ways that you can receive

Class3 error information.  Quarterly, Class3 errors will be delivered by

mail to the ANSYS Support Coordinator listed on your ANSYS license

agreement.  Please notify your ASD of any personnel or address changes

that should be incorporated into our records for your ANSYS agreement in

order to avoid any interruptions in receiving your Class3 Error Report

mailings.



For users desiring access to Class3 errors on a more timely basis you can

be added to our email distribution list.  To register for email

notification of reports, simply send an email request including your

email address, company name/address and ANSYS agreement number to

bonny.podolek@ansys.com.  If you are a current subscriber to email

distribution, please keep us informed of any changes in your email

address by emailing bonny.podolek@ansys.com.  After two failed

transmissions of reports, your name will be removed from the distribution

list.



Finally, Class3 Errors and QA Notices are posted on ANSYS's  Internet

HomePage.  The address is http://www.ansys.com.  They are located in the

ANSYS Zones sections of the HomePage under Customer.  The username to

enter this area is "customer" and the password is "ain1fm" (ANSYS is

number 1 for me).



For your convenience, also enclosed with this mailing you will find ANSYS

Class3 Error Summary Reports sorted both by error number and keyword for

Release 5.3 and Release 5.4.



                                        Sincerely,



                                        William J. Bryan

                                        Quality Assurance Manager



                  ANSYS Release Identifier Description



ANSYS release identifiers consist of a major release level, a minor

release level, a correction and a build date.  An example of how this is

constructed is shown below:



                    5.3  UP030797 <--- build date (form - UPmmddyy)



major release level --  -- minor release level



Major release level changes indicate that new features have been added to

the program and that some level of program architecture change and/or

file structure may have occurred.  Minor release level changes also

indicate that new features have been added to the program, but files are

upwardly compatible.  All known error fixes are include in both minor and

major releases.  The build date corresponds to the date the program was

created.  Special versions may be provided to circumvent an error and are

identified by build date.  Special versions am not general releases to

all ANSYS licensees, since they typically represent error corrections

occurring only on one system, a subset of our customers who have specific

graphics devices, etc.



When a release identifier on a Class3 Error Report does not include a

build date, all build dates for the indicated release level are included.

When a release identifier for FIRST INCORRECT VERSION explicitly includes

a build date, the release level with the indicated build date as well as

all earlier build dates for that release level are affected.  When a

release identifier for CORRECTED IN explicitly includes a build date, the

release level with the indicated build date as well as all subsequent

build dates contain the correction.



For example, a Class3 Error Report with "5.3 UP100396" for FIRST

INCORRECT VERSION and "5.5 UP063098" for "CORRECTED IN" would apply to

all 5.3 releases with a build date UP100396 or later all 5.4 releases

(regardless of build date) and all 5.5 releases with a build date earlier

than UP063098.



The ANSYS release identifier(s) shown under "corrected in" on the front

side of Class3 Error Reports indicates the first possible release that

contains the correction.



An identifier indicated under "corrected in" does not guarantee that a

general distribution of that release of ANSYS will occur.  It does

indicate that the correction is known and implemented in that or any

subsequent release.



                          Product Applicability



The ANSYS family of component products occasionally undergoes name

changes between releases and/or changes in the functionality of derived

products (such as ANSYS-PC/LINEAR).  To minimize the potential for

confusion in these area, unless otherwise noted on the front side of the

Class3 Error Report, the error report applies to all ANSYS family

products (including standalone component products) that contain the

described feature(s) in the designated release(s).



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 98-01



KEYWORDS: TARGE169  TARGE170  ELEM169   ELEM170   CONTACT



DESCRIPTION OF ERROR:



     Use of a nodal coordinate system other than global Cartesian system

(CSYS,0) is not supported for specification of boundary conditions on

target nodes (i.e., nodes associated with element types TARGE169 and

TARGE170).



TYPICAL GUI PATH(S):



Main Menu>Preprocessor>Create>Nodes>To Active CS

Main Menu>Preprocessor>Move/Modify>To Active CS

Main Menu>Solution/Preprocessor>Loads>Apply



FIRST INCORRECT VERSION(S):*                 CORRECTED IN:*



Release 5.4                                  Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Before assigning boundary conditions, rotate all the target nodes

into the global Cartesian coordinate system (NROT command).



COMMENTS:



     Transfer of solid model B.C.'s (DA, DL) may automatically rotate

nodes into a non-Cartesian coordinate system.  Do not use DL or DA to

apply constraints to target nodes.



AUTHOR/CORRECTOR:                                 DATE: February 3, 1998

               Yongyi, Zhu



REVIEWED BY QA:                                   DATE: February 3, 1998

               William J. Bryan



APPROVAL:                                         DATE: February 3, 1998

               David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the

reverse.side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-02



KEYWORDS:      PREP7          SHPP, WARN          SHAPE CHECKING



DESCRIPTION OF ERROR:



If SHPP,WARN is used to allow the storage of an element that would

otherwise produce a shape ERROR and normal shape testing is then restored

via SHPP,ON, then an incorrect WARNING message can be produced at SOLVE

that could lead to accepting poorly shaped elements.



<<<<<< TYPICAL WARNING PRODUCED >>>>>>



     Previous testing revealed that 1 of the 1 selected elements violate

     shape warning limits.  To review warning messages, please see the

     output or error file, or issue the CHECK command.



<<<<<< SHOULD GET THIS TYPE OF WARNING >>>>>>



     *** WARNING ***

     No shape testing has been performed on 1 of the 1 selected elements.

     To perform shape testing on these elements and see any warning

     messages about the others, please issue the CHECK command.



Note that solution with "error" elements selected would ordinarily not be

allowed.  The SHPP,WARN/SHPP,ON combination can permit solution to

progress with such elements, unless CHECK is done between SHPP,ON and

SOLVE.  The effect of this error is that the user is not sufficiently

warned of this possibility.



TYPICAL GUI PATH(S):



Preprocessor>Checking Ctrls>Shape Checking...  "On w/Warning msg",

     then ..."On w/Error msg"



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Release 5.4                             Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Issue the CHECK command after SHPP,ON.



COMMENTS:



AUTHOR/CORRECTOR:                            DATE: February 3, 1998

               Stan Kelley



REVIEWED BY QA:                              DATE: February 3, 1998

               William J. Bryan



APPROVAL:                                    DATE: February 3, 1998

               David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the

reverse.side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT

                                                       ERROR NO; 98-03



KEYWORDS: SHELL63   ELEM63    WARPED ELEMENT      THERMAL LOAD



DESCRIPTION OF ERROR:



          For SHELL63, the elastic shell element, all results are

          incorrect if:



     1.   the element is warped (all four nodes do not lie in a flat

          plane):



and  2.   the element is loaded with thermal membrane load (i.e., any

          point on the center plane has a temperature other than the

          reference temperature):



and  3.   the solution uses the nonlinear Newton-Raphson logic (e.g.,

          large deflections, plasticity, or contact elements are in use).



The magnitude of the error increases as the warping increases.



TYPICAL GUI PATH(S):



Preprocessor>Element Type>Add/Edit/Delete

Solution>Apply>Temperature>On Nodes:    Fnc_BF_temp



FIRST INCORRECT VERSION(S):*       CORRECTED IN:*



Rev.  5.0                          Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Consider using triangular elements or SHELL181.



COMMENTS:



AUTHOR/CORRECTOR:                            DATE: February 3, 1998

               Peter Kohnke



REVIEWED BY QA:                              DATE: February 3, 1998

               William J. Bryan



APPROVAL:                                    DATE: February 3, 1998

               David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  manual corrections are

included in on-line documentation as appropriate.  Please see the

reverse.side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-04



KEYWORDS: HARMONIC RESPONSE   MODE SUPERPOSITION       DAMPING



DESCRIPTION OF ERROR:



     The Structural Analysis Guide erroneously states that there is a

default damping value of 0.005 when using Harmonic Response (ANTYPE,harm)

using the mode superposition option (HROPT,msup).  The actual default

value is 0.0.



     The value of 0.005 is used ONLY for the computation of the frequency

points at which to calculate response in a mode superposition harmonic

analysis when using the cluster option (HROUT,, on), as described in the

Theory Manual.



TYPICAL GUI PATH(S):



Solution>Analysis Options:Fnc_An_Opts



FIRST INCORRECT VERSION(S):*       CORRECTED IN:*



Rev.  5.1                          Release 5.5 Structural Analysis Guide



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use the DMPRAT command to select the desired amount of damping.



COMMENTS:



AUTHOR/CORRECTOR:                            DATE: February 5, 1998

               Peter Kohnke



REVIEWED BY QA:                              DATE: February 5, 1998

               William J. Bryan



APPROVAL:                                    DATE: February 5, 1998

               David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-05



KEYWORDS:      SPECTRUM            DAMPING             SV



DESCRIPTION OF ERROR:



     When groups of spectrum values are input on the SV commands, with

each group having a different value of DAMP (damping ratio), the program

linearly interpolates between the groups, even though the documentation

states that the interpolation should be logarithmic.



TYPICAL GUI PATH(S):



Solution>Spectrum>Spectr Values



FIRST INCORRECT VERSION(S):*       CORRECTED IN:*



Rev.  4.0                          Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Choose damping ratios on the SV command to minimize the amount of

interpolation required.



COMMENTS:



AUTHOR/CORRECTOR:                                 DATE: March 3, 1998

               Peter Kohnke



REVIEWED BY QA:                                   DATE: March 3, 1998

               William J.  Bryan



APPROVAL:                                         DATE: March 3, 1998

               David L.  Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-06

KEYWORDS:      MODAL CYCLIC SYMMETRY              CYCSOL



DESCRIPTION OF ERROR:



       Mode shapes obtained in POST1 are incorrect for modal cyclic

symmetry analyses (CYCSOL command) when both of the following are true:



     1.   The model being analyzed has only 3 DOFs per node (e.g., a

          model consisting of only SOLID45 elements);



and  2.   Results for nodal diameters other than zero (either NDMIN or

          NDMAX in the CYCSOL command is not equal to zero) are

          requested.



Note that results for the displacement component UZ will be correct and

the other components will be zero.  Frequencies and modal stresses are

also correct.



TYPICAL GUI PATH(S):



Main Menu>Solution>Modal Cyclic Sym



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Release 5.4                             Released 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Set the ANGLE field of the SET command to "NONE".



COMMENTS:



     The error is due to POST1 interpreting the number of nodal diameters

as the symmetry condition for harmonic elements and subsequently

processing the displacements as though they were being evaluated at the

circumferential angle of 0.0 degrees.



AUTHOR/CORRECTOR:                            DATE: March 17, 1998

               John A. Swanson



REVIEWED BY QA:                              DATE: March 17, 1998

               William J. Bryan



APPROVAL:                                    DATE: March 17, 1998

               David L.  Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature In the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-07



KEYWORDS: SPECTRUM       PSD       PSDFRQ         PSDVAL



DESCRIPTION OF ERROR:



     If PSD solutions erroneously produce negative numbers for the

diagonal terms of modal covariance matrix (i.e., where mode i = mode j),

the input PSD curve with a slope of between 1 and 8 is improperly

represented.  Consequently, the 1 sigma results will be incorrect.



TYPICAL GUI PATH(S):



Solution>Spectrum>PSD vs Freq



FIRST INCORRECT VERSION(S):*       CORRECTED IN:*



Release 5.4                        Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Verify that there are no negative diagonal terms in the modal

covariance matrix, and if not, the calculation was performed as

documented.



COMMENTS:



     The diagonal terms of modal covariance matrix must be positive

numbers.  The error can be seen directly from the output.  It is

difficult to predict the error from the input because the input PSD curve

is transformed into polynomials by internal implementation.



AUTHOR/CORRECTOR:                            DATE: March 17, 1998

               Mu-Tsang Chen



REVIEWED BY QA:                              DATE: March 17, 1998

               William J. Bryan



APPROVAL:                                    DATE: March 17, 1998

               David L.  Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-08



KEYWORDS:      PLANE25             NEWTON RAPHSON



DESCRIPTION OF ERROR:



     All results are incorrect for PLANE25, the 4-node axisymmetric-

harmonic structural solid element if:



     1.   the previous load step had a different value of MODE or ISYM

          (MODE command) than the present load step;



and  2.   the Newton-Raphson option is active.



Examples of when the Newton-Raphson option is active are when stress

stiffening or element birth and death is present or when a gap element

type has been included.



TYPICAL GUI PATH(S):



Main Menu>Solution>Other>ForHarmonicEle



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Release 5.4                             Released 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Consider using PLANE83, the 8-node axisymmetric structural solid

element.



COMMENTS:



     An error message will appear at Release 5.5 for this condition.



     The use of axisymmetric-harmonic elements for nonlinear problems is

very limited, as these elements presume that the entire model is linear.



AUTHOR/CORRECTOR:                            DATE: March 19, 1998

               Peter Kohnke



REVIEWED BY QA:                              DATE: March 19, 1998

               William J. Bryan



APPROVAL:                                    DATE: March 19, 1998

               David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-09



KEYWORDS:                *VOPER              APDL



DESCRIPTION OF ERROR:



     Results of the *VOPER command (which operates on two array

parameters in the form ParR=Par1 o Par2) are incorrect if either of the

array parameters in the operation (Par1 or Par2) is a scalar (rather than

an array) and all of the following are true:



     1.   the scalar is defined using a parametric expression, e.g., par_

          name+3



and  2.   the scalar parameter name is exactly 8 characters long



and  4.   the array name occurs first in the expression



and  5.   the expression is not enclosed in parentheses



TYPICAL GUI PATH(S):



Utility Menu>Parameters>Array Operations>Vector Operations



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Rev.  5.0                               Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Enclose the parametric expression in parentheses, e.g.,

(par_name+3).



COMMENTS:



AUTHOR/CORRECTOR:                            DATE: April 9, 1998

               John A. Swanson



REVIEWED By QA:                              DATE: April 9, 1998

               William J. Bryan

APPROVAL:                                    DATE: April 9, 1998

               David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature In the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-10



KEYWORDS:      MODAL CYCLIC SYMMETRY         CYCSOL         EXPAND



DESCRIPTION OF ERROR:



     In a Modal Cyclic Symmetry analysis (CYCSOL command), if a base

sector does not have all of its nodes rotated into the global cylindrical

system (NROT,ALL), the expanded displacement solution is incorrect

(EXPAND command in POST1).  Stresses and the UZ component of displacement

are correct.



TYPICAL GUI PATH(S):



Main Menu>Preprocessor>Loads>Modal Cyclic Sym



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Release 5.4                             Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Rotate all the nodes into the global cylindrical system (CSYS,1

followed by NROT,ALL) before issuing the CYCGEN command.



COMMENTS:



AUTHOR/CORRECTOR:                            DATE: April 9, 1998

               John A. Swanson



REVIEWED BY QA:                              DATE: April 9, 1998

               William J. Bryan



APPROVAL:                                    DATE: April 9, 1998

               David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-11



KEYWORDS:      DA        KMODIF              SBCTRAN



DESCRIPTION OF ERROR:



     If an area has symmetry (or anti-symmetry) boundary conditions

applied to it [DA command] and one of its keypoints is subsequently

modified [KMODIF command], then the area symmetry (or anti-symmetry)

boundary condition will not be transferred to the corresponding finite

element model by a subsequent solid model boundary condition transfer

[SBCTRAN command].



TYPICAL GUI PATH(S):

Main Menu>Preprocessor>Loads>Apply>On Areas

Main Menu>Preprocessor>Move/Modify>Set of KPs



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Release 5.3 Release                     5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



COMMENTS:



     Apply area symmetry (or anti-symmetry) boundary conditions [DA

command] after modifying the area's keypoint(s) [KMODIF command].  Note

that initiation of a solution [SOLVE command] automatically performs the

SBCTRAN operation.



AUTHOR/CORRECTOR:                            DATE: April 9, 1998

               Wa Kwok



REVIEWED BY QA:                              DATE: April 9, 1998

               William J.  Bryan



APPROVAL:                                    DATE: April 9, 1998

               David L.  Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the Indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-12



KEYWORDS:      LAYER     POST1     PRNSOL    POWERGRAPHICS



DESCRIPTION OF ERROR:



     The PRNSOL command does not output the correct LAYER results when

PowerGraphics is enabled.  (i.e. SOLID46, SHELL91, and SHELL99).



TYPICAL GUI PATH(S):



General PostProc/List Results/Nodal Solution



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Rev.  5.0A                              Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Issue /GRAPH,FULL before listing PRNSOL "layer" results.



COMMENTS:



     In the corrected release, the PRNSOL command will output results in

FULL graphics mode when the LAYER command has been issued.



AUTHOR/CORRECTOR:                            DATE: April 9, 1998

          Paul Tallon



REVIEWED BY QA:                              DATE: April 9, 1998

          William J. Bryan



APPROVAL:                                    DATE: April 9, 1998

          David L.  Conover

* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 95-07 R2



KEYWORDS: PRO/ENGINEER   THERMAL STRESS      REFERENCE TEMPERATURE



DESCRIPTION OF ERROR:



     Results from any thermal-stress solution run from within the ANSYS-

Pro/ENGINEER environment will be incorrect unless the intended thermal

expansion reference temperature for the thermal strain calculation is 0

degrees.



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



ANSYS-Pro/ENGINEER 9345                 ANSYS-Pro/ENGINEER [Strikeout

                                        9738]



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



       The following two steps should be done:



     1.   Select the proper constraint case via the "Sel Cons Case" item

          under the "Run Study" menu (required only if more than 1

          constraint case was defined).



and  2.   Include the proper Reference Temperature via the "Use inp File"

          item under the "Run Study" menu using the following sequence of

          commands (temp should be the numerical value of the required

          Reference Temperature):

               [Strikeout: /PREP7

               TREF, temp

               LSWR.1

               FINISH]



COMMENTS:



     The thermal expansion reference temperature may be specified in the

Pro/ENGINEER material file.  However, this value is not included in the

list of material properties given to the ANSYS program unless a

structural temperature is defined in Pro/MESH.



     [Strikeout Number following product name is the version number]



AUTHOR/CORRECTOR:                            DATE: March 17, 1998

               Robert W.  Gorman



REVIEWED BY QA:                              DATE: March 17, 1998

               William J.  Bryan



APPROVAL:                                    DATE: March 17, 1998

               David L.  Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect am and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



Page 1 of 2                                            ERROR NO: 97-50 R1



KEYWORDS: VMESH     VDRAG     VEXT      VOFFST    VROTAT    ACCAT



DESCRIPTION OF ERROR:



     [Strikeout: VMESH fails to form pyramids at the interface between

volumes containing hex and tet elements if:



          1.   the hex elements were generated using VDRAG, VEXT, VOFFST

               or VRDT



     or   2.   the set of all areas belonging to the hex meshed are

               concatenated (ACCAT) and one of the concatenated areas

               belongs to a volume that is subsequently meshed with

               tetrahedra.



     or   3.   the volume being meshed with tetrahedra was previously

               meshed with an element type not supporting the pyramid

               shape, then cleared (this was observed only when the area

               shared between the volumes was meshed with

               quadrilaterals).



     Failure to form pyramids at the interface results in discontinuities

between the two volumes where two tetrahedron elements triangular faces

are attached to a single quadrilateral face of a hexahedron element.

This is likely to reduce solution accuracy near the interface.]



TYPICAL GUI PATH(S):



Main Menu>Preprocess>Mesh>Volumes-Free



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Release 5.4                             Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

[Strikeout: For Case 1.]



     Prior to performing the VMESH, perform AMESH command on interface

areas to generate quadrilateral elements.  VMESH will then correctly

generate pyramids interfacing the quads.  Delete the interface quad

elements afterwards.



[Strikeout: For Case 2.



     Delete area concatenations (ADEL) after creating the brick mesh, but

before creating the tetrahedron mesh



for Case 3.



     Clear quadrilateral elements, if any, from the area shared between

the affected volumes.]



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



Page 2 of 2                                            ERROR NO: 97-50 R1



COMMENTS:



[Strikeout: (If output has not been suppressed) the following type of

NOTE will appear in the output window whenever a pyramid transition is

formed:]



          [Strikeout: *** NOTE ***      CP=  23.750    TIME= 13:12:18]



AUTHOR/CORRECTOR:                            DATE: April 9, 1998

               F.  S.  Kelley



REVIEWED BY QA:                              DATE: April 9, 1998

               William J.  Bryan



APPROVAL:                                    DATE: April 9, 1998

               David L.  Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



               ANSYS [Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 98-01 R1

KEYWORDS: TARGE169  TARGE170  ELEM169   ELEM170   CONTACT



DESCRIPTION OF ERROR:



     Use of a nodal coordinate system other than global Cartesian s stem

(CSYS, 0) is not supported for [Strikeout: specification of boundary

conditions on] target nodes (i.e., nodes associated with element types

TARGE169 and TARGE170).



TYPICAL GUI PATH(S):



Main Menu>Preprocessor>Create>Nodes>To Active CS

Main Menu>Preprocessor>Move/Modify>To Active CS

[Strikeout: Main>Solution/Preprocessor>Loads>Apply



FIRST INCORRECT VERSION(S):*            CORRECTED IN:*



Release 5.4                             Release 5.5



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     [Strikeout: Before assigning boundary conditions,] Rotate all the

target nodes into the global Cartesian coordinate system, (NROT command).



COMMENTS:



     Transfer of solid model B.C.'s (DA, DL) may automatically rotate

nodes into a non-Cartesian coordinate system.  Do not use DL or DA to

apply constraints to target nodes.



AUTHOR/CORRECTOR:                            DATE: March 17, 1998

                    Yongyi Zhu



REVIEWED BY QA:                              DATE: March 17, 1998

                    William J. Bryan



APPROVAL:                                    DATE: March 17, 1998

                    David L. Conover



* Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                             ANSYS QA NOTICE



                                                       NOTICE NO: QA98-01



SUBJECT:  THERMAL ANALYSIS    TRIANGULAR ELEMENTS      TRANSIENT



DESCRIPTION:



     Transient thermal results using second-order triangular thermal

elements may be inaccurate due to an under-integrated specific heat

matrix.  Second-order triangular thermal elements include PLANE35,

PLANE77, and PLANE78.  These elements behave as documented in our

Elements Manual.



TYPICAL GUI PATH(S):



Preprocessor > Element Type > Add/Edit/Delete[Add][Thermal Solid]

Solution > New Analysis > Transient

Preprocessor > Mesher Opts > [MSHAPE][2D Shape Key][Tri]



AFFECTED VERSIONS: Rev.  4.2 - Release 5.3

               ANSYS/Thermal Rev.  4.2 through ANSYS/Thermal Release 5.3



OTHER COMMENTS:



     Use quadrilateral shaped elements (PLANE77, PLANE78) or first order

triangular elements (PLANE55, PLANE75) for transient thermal analyses.

The inaccuracy is more pronounced for problems with slow transient

behavior.



AUTHOR:                                      DATE: February 3, 1998

                    Subhasish Roy Choudhury



REVIEWED BY QA:                              DATE: February 3, 1998

                    William J. Bryan



APPROVAL:                                    DATE: February 3, 1998

                    David L.  Conover



                             ANSYS QA NOTICE



                                                       NOTICE NO: QA98-02



SUBJECT:  SOLID87   SOLID98   THERMAL ANALYSIS    TRANSIENT ANALYSIS



DESCRIPTION:



     SOLID87 (3-D 10-Node Tetrahedral Thermal Solid) elements with curved

sides and SOLID98 (Tetrahedral Coupled-Field Solid) elements (with

straight or curved sides) produce inaccurate results in a thermal

transient analysis.  Before 5.3, any SOLID87 element (even one with

straight sides) exhibited this inaccurate behavior.  However, they behave

as documented in our Elements Manual.



TYPICAL GUI PATH(S):



Preprocessor > Element Type > Add/Edit/Delete [Add][Coupled Field][Scalar

Tet 98]

Preprocessor> Element Type> Add/Edit/Delete [Add][Thermal Solid] [Tet 10

node 87]

Solution > New Analysis > Transient



AFFECTED VERSIONS: Rev.  4.2 through Release 5.3

               ANSYS/Thermal Rev.  4.2 through ANSYS/Thermal Release 5.3



OTHER COMMENTS:



     For a transient analysis with SOLID87 elements, use SOLID87 elements

with straight edges only.  Note that issuing the ESHAPE (ELSIZE prior to

Rev.  5.0) with KSTR = 1 command (Main Menu > Preprocessor > Shape & Size

> Element Shape in the GUI) will force the SOLID87 (or any other mid-side

node elements) to have straight edges in any subsequent mesh.



     This inaccuracy is due to under-integration of the specific heat

matrix.  The inaccuracy is more pronounced for problems with slow

transient behavior.



AUTHOR:                                      DATE: February 3, 1998

                    Subhasish Roy Choudhury



REVIEWED BY QA:                              DATE: February 3, 1998

                    William J. Bryan



APPROVAL:                                    DATE: February 3, 1998

                    David L.  Conover



                             ANSYS QA NOTICE



                                                       NOTICE NO: QA98-03



SUBJECT:       POST1     *GET      CENTROID       LARGE DEFLECTION



DESCRIPTION:



     In POST1, following a large-deflection analysis, obtaining the

element centroid by issuing *GET,par,ELEM,entnum,CENT,x (or y or z) gets

the original centroid location, not the final (displaced) centroid

location.  The *GET command description would lead users to believe that

this item, listed under POST1, would be updated for large deflections.

However, the element centroid that is obtained by *GET is not updated for

large deflections.



Typical GUI Path(s):



Utility Menu > Parameters > Get Scalar Data > Results data; Element

results>Geometry;Elem loc CENTX/Y/Z



AFFECTED VERSIONS: Revision 5.0 thru Release 5.4



SUGGESTED USER ACTION:



     SOLVE, then SAVE the original database.  Use UPCOORD to update the

geometry, and SAVE another database with updated geometry.  The updated

database can be used to *GET an updated element centroid location.  The

original database can be used for all other postprocessing.



COMMENTS:



     At Release 5.5, the reference to element centroid location in the

POST1 section of the GET command description, as well as the

corresponding items in the GUI will be removed.



AUTHOR:                                      DATE: March 17, 1998

                    John Dulis



REVIEWED BY QA:                              DATE: March 17, 1998

                    William J. Bryan



APPROVAL:                                    DATE: March 17, 1998

                    David L.  Conover



                             ANSYS QA NOTICE



                                                       NOTICE NO: QA98-04



SUBJECT:       GUI            *GET           KEYOPT



DESCRIPTION:



     In the GUI, any data entered for the double digit KEYOPTS (10, 11,

and 12) in the Preprocessor-Element Type-Options dialog box results in

subsequent dialog boxes showing the KEYOPT1 value.  When this dialog box

is accepted, the KEYOPT1 value is used.  The initial setting however is

stored correctly.  This also occurs in picking model data for element

types in Parameters-GetScalarData-ModelData-ElementTypes-OK-(Keyopt10,

11, or 12).



Typical GUI Path(s):



Parameters > Get Scalar Data > Model Data//Element Types//OK > Keyopt(10)

or (11) or (12) and Preprocess-Element Type-Options



AFFECTED VERSIONS:  Revision 5.1 through Release 5.4



SUGGESTED USER ACTION:



     Do not rely on the dialog box settings for keyopts greater than 9.

All double digit keyopts have this problem.  Use command line input for

setting the higher keyopt values.



COMMENTS:



AUTHOR:                                      DATE: March 17, 1998

                    Ron Werkmeister



REVIEWED BY QA:                              DATE: March 17, 1998

                    William J.  Bryan



APPROVAL:                                    DATE: March 17, 1998

                    David L.  Conover



                             ANSYS QA NOTICE



                                                       NOTICE NO: QA98-05



SUBJECT:  YEAR 2000           LEGACY DATA         LICENSING



DESCRIPTION:



     Revision 5.0 of ANSYS, released in 1992, and all prior releases have

an error in the software that will prevent the software from running

beyond December 31, 1999.



AFFECTED VERSIONS:  ANSYS Releases prior to Revision 5.0A



SUGGESTED USER ACTION:



     If you are using these releases of the ANSYS products, you are urged

to move to Release 5.4 as soon as possible.  Contact your local ANSYS

Support Distributor for information on making this move.  For special

needs regarding legacy engineering data for releases prior to 5.0A,

please contact Linda Richard at via email at linda.richard@ansys.com or

by telephone at 724-514-2914 in our Customer Services Unit to find out

more about the services that are available.



AUTHOR:                                      DATE: April 9, 1998

                    Sam Murgie



REVIEWED BY QA:                              DATE: April 9, 1998

                    William J. Bryan



APPROVAL:                                    DATE: April 9, 1998

                    David L.  Conover



                             ANSYS QA NOTICE



Page 1 of 3                                                       QA98-06



     ANSYS 5.4  Interim Release    Service Pack 4      Service Pack 6



An interim release of ANSYS 5.4 which allows user Fortran customization

on the Intel Windows NT platform, extends university version problem

limits and contains some error corrections is now available.  This

interim release is identified as ANSYS 5.4 UP19980310.  lt is available

in two forms.  It maybe obtained from the ANSYS Homepage (www.ansys.com -

Services,Support > Software Update Manager) as ANSYS Service Packs 4 and

6.  It is also available on CD and may be obtained by completing a

request form that is available on the ANSYS Homepage (Services,Support >

Software Update Manager in the Interim Releases area).  The request form

is also available from your ANSYS Support Distributor.



Description of ANSYS Service Packs 4 and 6



Service Pack 4 contains the most current ANSYS executable (UP19980310),

the DISPLAY executable, and the XANSYS executable (UNIX only), along with

a set of updated utility scripts, command macros, and graphical user

interface (GUI) granules.  These contents are replacements for earlier

releases of these ANSYS 5.4 files.  These updated files contain

corrections for several errors that were detected, reported, and

corrected after the initial release of ANSYS 5.4.  The following

corrections are in Service Pack 4.  The numbers in parentheses associated

with each item are reference numbers corresponding to our internal error

tracking system and are listed here for your convenience in referencing a

particular error.



PCG Solver Corrections:

o    The PCG solver was corrected for non-convergence in some isolated

     conditions and for re-running after the Stop button was used to stop

     a running analysis.  (10534, 10550)



General Solver Corrections

o    SOLID95 produces correct plasticity results in POST1 for SEPL, EPEQ,

     and HPRES.  (10170).

o    Wave propagation for small time delays corrected in PSD analysis.

     (10178)

o    Convergence for node-to-node contact (CONTAC12 and CONTAC52) is

     improved.  (10752)

o    Substructure runs now have reduced memory requirements.  (10449)

o    The correct force vectors are now available for mode superposition

     harmonic analysis after a modal solution performed using

     PowerDynamics.  (9766)



Modeling/Meshing Corrections:

o    You can now use the approximate location option to create a straight

     line perpendicular to an existing line (LANG command).  (10047)

o    The CEINTF command now works correctly with partial sets of DOFs.

     (10516)



Element Corrections

o    Small models using large element numbers no longer require unusually

     high memory usage.  (10269)

o    FLOTRAN FLUID142 now allows TEMP as a valid degree of freedom on the

     BFINT command.  (10515)

o    Elements in large models that sometimes did not appear are now

     correctly displayed usingEXPAND and /EXPAND.  (10623)

o    Element centroid and volume data is now available when loading

     geometry via the SET command (no RESUME of the database).  (10831)

o    POST1 reaction forces for harmonic elements are correct if an ANGLE

     other than "none" is specified on the SET command.  (10803)



                             ANSYS QA NOTICE



Page 2 of 3                                                       QA98-06



Windows NT/95 Version Corrections:

o    GUI configuration in the Launcher now works correctly. (9788)

o    The Display program window now allows reduction to zero height or

     width. (10264)

o    The Launcher under Windows 95 now works correctly. (10251)

o    MIN/MAX fields on the select commands are no longer truncated to 20

     characters. (10210)

o    The -p option can now be placed anywhere in the string of ANSYS

     command line options. (10625)



Other Corrections:

Other corrections/improvements include:

o    Graphics: pressure arrows, dynamic rotation/manipulation,

     PowerGraphics, and other plotting improvements

o    GUI: highlighting, missing GUI options, STOP button, and GUI data

     handling

o    Speed/Performance: Load step handling, printing nodal solutions,

     element modification, facet specification.



Class 3 Errors Corrected:



The following Class3 Errors are corrected in this release.  See the ANSYS

Home Page (www.ansys.com - ANSYS Zones> Customer) for details of the

items listed 97-50, 97-51, 97-52,97-53, 97-54, 97-56, 97-57, 98-03, 98-

06, 98-07, 98-09



QA Notices:

The correction for QA Notice QA98-04 is included in this release.  See

the ANSYS Home Page (www.ansys.com - ANSYS Zones> Customer) for details

of QA98-04.



It should be noted that QA Notice QA97-05 applies to this interim

release.  If a database file (Jobname.DB) created in the 5.4 UP19971021

release or any later 5.4 release (including this interim release) is used

when resuming in an earlier 5.4 release such as the ANSYS, 5.4 initial

release (UP19970828) or the Connection release (UP19970930), then the

program will abort.  If you will be sharing databases with other 5.4

installations, you can avoid this problem by making sure that all of your

ANSYS 5.4 products (ANSYS, ANSYS/LS-DYNA, and ANSYS Connection) have the

most current ANSYS executable (UP19980310).



Additionally, Service Pack 4 contains all changes and corrections made in

ANSYS Service Packs 1 and 3. See the ANSYS Service Packs area in Software

Update Manager on the ANSYS Homepage for information about Service Packs

1 and 3.



Service Pack 6 contains an updated ANSYS License Manager Daemon

(ansys_lm).  This newer daemon corrects several Elan errors, including

the following Windows-specific problems:



License manager corrections

License files can disappear under certain circumstances.

The license manager does not always restart when the system is rebooted.

The license manager sometimes starts and stops for unexplained reasons.



                             ANSYS QA NOTICE



Page 3 of 3                                                       QA98-06



Information regarding User Programmable Features and re-linking ANSYS



The ANSYS 5.4 UP19980310 CD must be acquired in order to make use of

user-programmable features with this interim release.  Object files and

scripts that are required for re-linking the ANSYS program are included

on the CD but are not provided with Service Packs 4 and 6 on the ANSYS

Homepage.  If Service Packs 4 and 6 are obtained from the ANSYS Homepage

and installed and then a re-link (for user programmable features) is

subsequently performed, then the previously installed ANSYS Release will

be used by the re-link.  This will result in the loss of Service Pack 4

changes and corrections.



Beginning with this interim release, user-programmable features are no

longer supported on Intel NT 3.51 systems due to the unavailability of

compilers for this platform.  Also beginning with this interim release,

the following compilers are required in order to use user-programmable

features on Intel Windows 95 and Intel Windows NT 4.0 systems:

     Microsoft Visual C++ v5.0, Microsoft Service Pack 3

     Digital Visual Fortran v5.0B



Author:                                      Date: April 9,1998

                    Ken Rodlaszewski



Reviewed by QA:                              Date: April 9,1998

                    William J.  Bryan



Approval:                                    Date: April 9, 1998

                    David L.  Conover



                   ANSYS SUPPORT COORDINATOR BULLETIN



                                                                SCB 98-02



     Occasionally and apparently randomly, the Sun version of ANSYS 5.4

runs indefinitely, i.e. never completes, during ANSYS solution.  If this

occurs, we recommend that you simply try running the solution again.  Our

experience to date indicates that subsequent executions of the same ANSYS

solution are likely to run to completion.



     ANSYS Inc. and Sun Microsystems are working diligently to understand

and correct this problem.  Any progress made will be communicated in a

future Support Coordinator Bulletin.



Author:                                      Date: April 9,1998

                    Sam Murgie



Reviewed by QA:                              Date: April 9, 1998

                    William J.  Bryan



Approval:                                    Date: April 9, 1998

                    David L.  Conover



ANSYS



March 27, 1998



Dear Valued Customer:



In an ongoing effort of providing superior level service to our

customers, ANSYS is pleased to announce the availability of Interim

Product Releases.



Interim Releases contain product maintenance as well as changes needed to

support new ANSYS products.



The Interim Release will be provided to any new customer and also offered

to existing customers under a valid TECS ( Maintenance ) agreement or

lease agreement.



To make it easy for you to request the release, we have added a new

section on the ANSYS Homepage where you can down load the version at your

convenience.  ( Service - Software Update Manager)



Our objective is to be able to offer Interim Releases three to four times

a year.



Existing TECS and lease customers will be notified quarterly, through the

ANSYS Support Coordinator, via a QA Notice announcing availability and a

summary of any new interim releases.  The ANSYS Homepage (Service -

Software Update Manager) is always available for more timely notification

and content details.



If you have any questions, please contact your local ASD for additional

details or contact me at 724514-3094.



Sincerely,



Paul A.  Chilensky

Vice President, Customer Services



                   ANSYS SUPPORT COORDINATOR BULLETIN



                                                    BULLETIN NO: SCB98-01



This bulletin is being issued to inform users of the existence of an

undocumented form of the MP command with Lab = EMIS and to prevent

potential confusion or misuse when generating a radiation matrix in

AUX12.



KEYWORDS:      Emissivity     EMIS      undocumented command AUX12



DESCRIPTION:



     An undocumented EMIS command exits in PREP7 and SOLUTION.  It is a

short form of the MP,EMIS,...  command and it exists to provide upward

compatibility of pre-Revision 5.0 input.  Users should be aware of the

difference between the undocumented PREP7/SOLUTION EMIS command and the

documented AUX12 EMIS command as well as how emissivity is defined for

AUX12 radiation matrix generation.



     The undocumented EMIS command defines the PREP7 material property

emissivity as described in pre Revision 5.0 User Manual documentation.

As with all material properties defined with the MP command, such a

defined emissivity material property is used as described in the Elements

Reference and the Theory Manual.  It is not used for emissivity in AUX12.

Note that only a few elements (ex. LINK31, SURF19, SURF22), as noted in

the Elements Reference, make use of the emissivity material property and

that these elements are not used to define radiating surfaces for AUX12.



LINK32 or SHELL57 elements must be used to define radiating surfaces for

AUX12.  The documented AUX12 EMIS command must be used in AUX12, as

described in Generating the AUX12 Radiation Matrix in chapter 4 of the

ANSYS Thermal Analysis Guide (section 4.4 of the Procedures Manual prior

to the 5.3 Release) to define the emissivity for radiation matrix

generation.



Potential Impact:



     If MP,EMIS or the undocumented form (EMIS) of the MP,EMIS command is

mistakenly used in PREP7 or SOLUTION to define an emissivity material

property value and no EMIS command is issued in AUX12 to define the

emissivity for radiation matrix generation, then the default emissivity

value of unity (1.0) will be used for the radiation matrix calculation in

AUX12.



AUTHOR:                                      DATE: February 3, 1998

                    Ken  Rodlaszewski



REVIEWED BY QA:                              DATE: February 3, 1998

                    William J.  Bryan



APPROVAL:                                    DATE: February 3, 1998

                    David L.  Conover



ANSYS



March 20, 1998



Dear Valued Customer:



ANSYS 5.5 is nearing beta release, with Q3 1998 availability.  This

upcoming release continues our commitment to provide state-of-the-art

problem solving capability for a variety of Multiphysics simulations.

Major enhancements are expected in the following areas.



     Geometry Import/Meshing:



     Improved geometry importation, beam meshing with orientation, a new

     quad surface mesher, sweep meshing in existing volumes.



     Structural Mechanics/Dynamics:



     2D and 3D flexible to flexible contact (simplified stiffness, low

     and high order element support, friction models, weak springs), new

     lower and higher order beam elements, Beam Tool for beam section

     definition, new 2D and 3D finite strain solid elements.



     Multiphysics:



     Advanced thermal boundary conditions, new pipe element, new surface

     elements, advanced turbulence models, Petro-Galerkin formulation for

     CFD, nonlinear harmonic electromagnetic analysis.



     Prep/ Graphics/ Post/ APDL:



     Faster graphics, Visual GUI Builder, space ball support, support of

     element shapes with PowerGraphics, 2D translucency, Windows metafile

     (.wmf) and enhanced metafile (.emf) support.



As part of our ongoing support, we are informing you of modifications to

supported hardware platforms and operating system levels that are

required for ANSYS 5.5.  Please review the enclosed attachment describing

the Hardware and System Support for ANSYS 5.5.  If you have any

questions, please contact your ANSYS Support Distributor.



We thank you for your understanding and cooperation as we make

improvements to the ANSYS Family of Products.  We are confident that you

will find much to be excited about in our upcoming release!



Sincerely,



Frank J.  Marx, PE



Hardware and System Support for ANSYS 5.5



The table below lists the hardware and the appropriate operating system

level for the ANSYS 5.5 Family of Products.  ANSYS/LS-DYNA runs on a

limited set of these platforms as indicated in the table.  The operating

system levels that are new or different from ANSYS 5.4 are preceded by an

asterisk


Table ANSYS 5.5 Supported Hardware


Table "ANSYS 5.4. CLASS3 ERROR SUMMARY" - Keyword Sort of All Revision 5.4




Table "ANSYS 5.4. CLASS3 ERROR SUMMARY" - Report Number Sort


Table "ANSYS 5.3. CLASS3 ERROR SUMMARY" - Report Number Sort




Table "ANSYS 5.3 ClASS3 ERROR SUMMARY" - Keyword Sort








*** END OF DOCUMENT ***


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