patran错误代码.doc

ERROR LIST LATEST UPDATE: 20-FEB-2001 CURRENT ERROR LIST-This section includes a description of all known errors and generallimitations in all versions of MSC.Nastran. The field next to the error number indicates the version that the error is corrected. GL in this field stands for a General Limitation which indicates a fix is not planned. Continuous updates to the error list are available to MSC.Nastran clients on the MSC web page at . The site may be located by clicking on Services and Support.Major CapabilitiesA list of major capabilities is provided to assist the analyst is choosing key-words to search for to locate error that may impact their current project.Error DescriptionEach error has a heading with as many as three entries. The firstentry identifies the major capability affected and is also listed inthe major capabilities index. The second entry identifies either thename of the module in which an abnormal exit occurs or the card typeaffected if computed results are not satisfactory. (For abnormalexits, the last module name that appears in the Performance SummaryTable is usually the module where the exit occurs.) The third entrygives the symptoms of the error, such as, the MSC/NASTRAN system oruser message number printed just prior to termination or a descriptionof a machine-dependent error. Other symptoms might be missingoutput or wrong answers. Error reports are updated when more facts orbetter avoidance techniques become known.NOTE:Beginning with Version 68, MSC/NASTRAN has adopted a Version numberingsystem of the form XX.YY.ZZ, where XX is the major release, YYindicates a minor release with few enhancements and ZZ indicates errorcorrections. Note that modifications to the code that are requiredso that a specific machine runs the same as previous releases on othermachines are considered error corrections in this numbering scheme.Thus, there may not be any references in the error list to a specificrelease number. Keyword IndexThe Keyword Index has been removed from the error listSince the error list is maintained internally at MSC ina relational database and is provided to the user in variouselectronic formats search utilities have replaced the need for akeyword index and the maintenance of the keyword index has beendiscontinued.A list of the major categories follows:Accounting Acoustic Analysis Aeroelastic Analysis Authorization Axisymmetric Fluid Elements Beam LibraryBuckling Analysis Buckling & Differential StiffnessCase Control Complex Eigenvalues, Component Mode SynthesisComposites Cyclic SymmetryDBC/TRANS/ACCESSDMAPDatabaseDesign SensitivityDocumentation Dynamic ReductionDynamic Response AnalysisEigenvalue AnalysisElement Strain EnergyElementsEstimate ExecutiveExecutive LimitsExternal SuperelementsFile Management SectionFrequency ResponseFrequency Response and Random AnalysisGap ConstraintsGeometric NonlinearityGrid Point ForceGrid Point StressGrid Point Stress DiscontinuitiesHeat Transfer AnalysisHydroelastic AnalysisHyperelastic Nonlinear AnalysisInertia ReliefInstallationInterface ElementsIterative SolverLimitation on Problem SizeLoadsMSC/ACCESSMSGMESH, MSGSTRESS, MSGVIEWMaterial Nonlinear AnalysisMaterialsMatrix MethodsMethod SelectionMiscellaneousModal AugmentationNonlinear AnalysisNonlinear Eigenvalue AnalysisNonlinear Slide-Line AnalysisNonlinear Static AnalysisNonlinear Superelement AnalysisNonlinear Transient AnalysisNonlinear Transient Heat TransferOld Design SensitivityOnline Documentation Optimization/Design SensitivityP-Elements Parallel PerformancePlottingPostprocessingResponse SpectraRestarts Rigid Elements SSSALTERSSecuritySequencerSingle Point ConstraintsStatic Aeroelastic Analysis Static AnalysisSubmittal Superelements Thermal Stress Analysis Timing Estimate Transient Nonlinear Analysis Transient Response Analysis UtilitiesVirtual Mass 399; 70.5; Eigenvalue Analysis - CEAD, QRG - Unexpected Normalization Complex eigenvalue analysis with the inverse power method of eigenvalue extraction will always normalize to MAX. POINT normalization requests are ignored. The Version 70.5 Quick Reference Guide has been updated to indicate that point normalization is only available for the det method. 745; GL; Plotting - XYOUTPUT - UFM 688, UFM 687 In requesting XYOUTPUT, if the last frame request on an XYPLOT command is for an upper frame only, e.g., .(T1,), then the USER FATAL MESSAGE 688 or 687 will terminate the run. An avoidance is to explicitly insert 1000 for the component of the lower frame plot, e.g., .(T1,1000). 785; 69; MSGMESH, MSGSTRESS, MSGVIEW - MSGMESH, DIAG 29 - Infinite CPU Loop If MSGMESH is used with the link specification update feature, an infinite loop occurs. An infinite loop no longer occurs; UFM 53 will be issued indicating an incorrect format for the mesh entries. 796; GL; Hydroelastic Analysis - AXIF - UFM 2047, UFM 2053 If the harmonics flag is set to NONE in Field 7 on the AXIF entry, then the Case Control command AXIS=FLUID may not be used. 827; GL; Response Spectra - DLOAD, RLOADi, TLOAD - UFM 2135 Scaled Response Spectra uses DLOAD Bulk Data entries. They point to DTI entries, and can violate the DLOAD rule that says the Li entries must be unique. However, the DLOAD entry is not checked if no RLOADi or TLOADi entries appear in the Bulk Data Section. It is therefore illegal to have RLOADi or TLOADi entries present when using scaled response spectra. If they are not present, the solution sequence will function properly. 868; 70.7; Miscellaneous - PUNCH - Incorrect Format STRESS(PUNCH) will not properly output the HEXA, PENTA, BEND, BEAM, TRIA6, or QUAD8 elements. Element margins of safety (ROD, CONROD, TUBE, and BAR elements) will produce poor punched formats if stress allowables are not given on the referenced MATi entries. 888; GL; Limitation on Problem Size - Rigid Elements - UFM 3008 The capacity for processing Rigid Elements in the GP4 module is limited since the entire nonzero RG matrix must be stored in memory. Splines are particularly bad. For example, let NS = the number of RSPLINEs (two dependent, five independent), R = the number of RBARs, and NG = the number of grids. Then, (350 X NS + 90 X R) (OC -7 X NG - 3 X BUFFSIZE). For example, if OC = 72000, NG = 1000 and BUFFSIZE = 4166, then the user is limited to 150 splines. 889; GL; Elements - CELAS - Unintended Constraints Scalar elements connected to noncolinear degrees of freedom introduce constraints which will not appear in the output. 890; GL; Grid Point Force - GPFDR - UFM 3008 The open core requirement for the GPFDR module can be as large as (6 X BUFFSIZE + 14 X number of grids) if the grids use a nonrectangular displacement coordinate system. For problems in basic coordinates, the grid requirement drops to 8 X number of grids. 903; GL; Elements - CONEAX, SORT2 - Incorrectly Formatted Output Conical shell problems do not prepare SORT2 output properly. In addition, the SORT2 requests generate unwanted and meaningless punched output. 916; GL; Plotting - XYPAPERPLOT - Missing Plot Output X-Y paper plots do not include all the features of a graphic plotter. Titles and MAX/MIN functions are about the only features supported. TICS, DIVISIONS, GRID LINES, and LOG SCALES are not supported. 1022; GL; Nonlinear Analysis - OLOAD - Wrong Answers The resultants for the applied loads are incorrect if cylindrical or spherical coordinates are used. This output is informational only and the solution is not affected. 1065; GL; Superelements - SEMA - SEMA FATAL MESSAGE Superelements may be excluded from assembly in SEKR and SELR (SEEXCLUDE). However, if all upstream superelements are excluded from a given superelement, then the program will fail. An avoidance is to put PARAM,NOUP,-1 in the first Case Control subcase for the failing superelement. 1086; GL; Plotting - CONTOUR - UFM 4212 Insufficient open core for contour plotting may result in a misleading message. The avoidance is to increase open core. 1103; GL; Dynamic Response - TRD, TRD1, FRRD, FRR - UFM 3005 If the MGIV method of real eigenvalue extraction computes modes for massless DOF with uncoupled stiffness terms, the eigenvalue is large (1.E+35) as it should be, but the generalized stiffness is 0.0 (it should also be 1.E+35). Null eigenvectors may be produced. An avoidance is to use PARAM,HFREQ or PARAM,LMODES to discard these bad modes in dynamics. 1125; GL; Sequencer - RESTART, PARAM,NEWSE - Wrong Answers If the sequence processor is used for any part of an analysis, it should be executed on all restarts which input data. The value of PARAM,NEWSEQ should remain unchanged in every run. 1183; GL; Eigenvalue Analysis - READ - Negative Term on Factor Diagonal If the user requests the eigenvector for an infinite frequency mode, the program may fail. An avoidance is to reduce the ND value on the EIGR bulk data entry to be less than N. The Nth eigenvector is numerical noise. 1308; 68; Aeroelastic Analysis - FA1 - Poor Answers The eigenvalue extractions by the PK and KE methods are performed in lower precision than most other calculations (single precision). Excessive truncation error may occur in some problems on short-word machines. The only machines that will not experience this problem are the CRAY, CDC and NEC computers. Contact MSC for avoidance procedure. 1357; 70.5; Aeroelastic Analysis - GI - Poor Accuracy The linear splines used to connect structural and aerodynamic degrees of freedom are sensitive to modeling techniques, particularly on short-word machines. This included all machines except CRAY, CDC and NEC. It is good practice to have the spline axis coincide with the structural grid points, and to avoid discontinuities in the lines joining structural grid points by using separate splines on each side of the discontinuity. 1405; GL; Elements - HEXA - Stress Discontinuities Transitioning mesh densities by connecting two elements to one with midside nodes causes local stress perturbations, because the assumed displacement shapes at the interface are not compatible. An avoidance is to use PENTA elements to change the mesh size. 1551; GL; Eigenvalue Analysis - READ - Eigenvalues Not Found The wrong reason for termination may be given if the region for search listed on the EIGB or EIGR bulk data entry does not include negative eigenvalues or if NE is underestimated. An avoidance is to increase the number of roots desired (ND) and the number estimated (NE) to ensure all roots in the region are found. 1575; 69; Dynamic Response - VDR - No Output If an OUTPUT(XYPLOT) command is in case control, but there are no other XYPLOT commands, all printed output requests are ignored. An avoidance is to put in XYPLOT requests or remove the OUTPUT(XYPLOT) command. 1581; GL; Elements - SOL 64, 66 - Various Symptoms of Numerical Instability If flat plate models have out-of-plane singularities when unloaded, but have enough angle between adjacent plates to constrain singularities in the deformed state, various numerical problems such as overflow, machine-dependent messages from trigonometric functions, or other problems may arise. An avoidance is to use PARAM,K6ROT,1.0 to provide stiffness for the out-of-plane singularities. 1584; GL; Geometric Nonlinearity - GNFM - SFM 3007 If PARAM,TESTNEG,-2 is used in SOL 64, and grid point singularities exist, the computational zeroes they cause on the diagonal of the factor of the stiffness matrix can be small negative numbers, leading to the error message SYSTEM FATAL MESSAGE 3007. PARAM,TESTNEG,-2 should not be used in Subcase 1. PARAM,AUTOSPC,YES will remove this type of singularity. 1664; GL; DMAP - Dummy Elements - Wrong Answers User-written element subroutines that use OXFORM=5 produce incorrect results from the EMA module. The values of OXFORM=3 or 4 may be used instead. 1679; 66; Elements - QUAD4,TRIA3 - Wrong Answers When the MID4 option of the PSHELL card is used to simulate offset of the element centerline from the grid point plane, the element is somewhat too stiff. The error increases with the ratio of offset to element width. An avoidance is to use RBAR elements to model the offsets . 1712; GL; Frequency Response Analysis - RANDOM - SWM 3002, UWM 979 If a non-existent point is referenced in an output request when there are multiple subcases, the RANDOM module will cease processing at that point and issue SYSTEM WARNING MESSAGE 3002. The following user warning message is now issued: 0* USER WARNING MESSAGE 979, AN XY-OUTPUT REQUEST FOR POINT OR ELEMENT ID 2000 -ACCE- CURVE IS BEING PASSED OVER. THE ID COULD NOT BE FOUND IN DATA BLOCK 102 1738; 66; Grid Point Stress - Preface - UFM 603 If the SURFACE Case Control card has a continuation card, and the first words that appear on this card are OUTPUT SYSTEM, the error occurs. An avoidance is to start the continuation with another word. 1739; 66; DMAP - DIAG 4 - Addressing ERROR If DIAG 4 is used on restart, the program may exit abnormally at the start of the run. The DIAG 4 cross reference output for Label Names will be incorrect if no labels exist in the DMAP, and the parameter section of the cross reference will not contain any parameters although parameters are present. An avoidance is to put a label in the DMAP. 1758; GL; Cyclic Symmetry - Restarts - Various In superelement static cyclic symmetry (SOL 81), some restart paths do not function well. The following restart paths have been demonstrated to work, using the indicated input and DMAP Alters. Other types of restarts can be made, using these techniques. A. Conventional Superelement Restarts. Use the same techniques applicable to noncyclic symmetry superelement analysis. 1. Exit during Phase I. 2. Structural Changes in a Superelement. 3. Load Change Restart B. Time Limit in a Harmonic Loop SET N = 0, residual only SEMG = N PARAM,RESDUAL,-1 (bulk data) Input all bulk data, or use PARAM,NODATA,-1 and delete all the bulk data except PARAM entries. C. Loads Change in One Tip Superelement, Same Number of Loading Conditions, Same Load SET N = include changed superelement plus all downstream S.E.s including the residual structure. SELR = N SELG = N PARAM,DLOAD,-1 Input all loads. (Conventional Superelement Restart.) D. Additional Output (Not required in MSC/62) Harm