关于执行nastran环境参数设置

Tuning&CustomizingtheMSC.NastranRuntimeEnvironmentTopics:AllocatingMemoryHowmemoryisusedUsingthe“estimate”programJob-submitkeywordsHandykeywordstoknowaboutCustomizingyoursettingsMakingyourownnastrcfileTopics:AllocatingMemoryHowmemoryisusedUsingthe“estimate”programJob-submitkeywordsHandykeywordstoknowaboutCustomizingyoursettingsMakingyourownnastrcfileMemory&MSC.NastranAllprogramsrequirecomputermemory(RAM)torunSowhathappensifaprogramneedsmoreRAMthanisavailable?Somedatagetstemporarily“swapped”outofRAMandiswrittenontodiskWriting&readingdataondiskismuchslowerthanfromRAMOperatingsystemusuallyhandlesswapMemory&MSC.NastranMSC.NastranmanagesitsownRAM-to-diskswappingProgram-specificswapiswaymoreefficientProgramknowswhatdataitisgoingtoneedandwhenitwillneeditOSswapisrandomMurphy’sLawappliestocomputers–thedatatheprogramneedswillhavejustbeendumpedtodiskMemory&MSC.NastranObjective:LetMSC.NastranmanageitsownuseofRAMSystem“manages”RAMforallrunningprogramsMSC.NastranmanageswithinitsownallocatedRAMTherefore:AllocateafixedamountofRAMforMSC.NastrantoworkwithatthestartofarunLetMSC.Nastranmanagehow/when/whattoswapwithinthisallocatedRAMMemory&MSC.NastranTotalSystemRAMRAMforSystemO/SRAMforMSC.NastranRAMforProgramYRAMforProgramXFreeRAMRAMforProgramZAmountallocatedforMSC.NastranshouldfitwithinavailablesystemRAMMemory&MSC.NastranSohowmuchRAMdoesanMSC.Nastranrunneed?DependsonproblemsizeToolittleinefficientexecutionToomuchinefficientexecutionrockHardplaceYouarehere050100150200250300050100150200MemoryAllocated(MB)Time(sec)ElapsedTime(sec)CPUTime(sec)AllocatedRAMv.TimeElapsedTimeCPUTimeMemory–howtomonitor***USERINFORMATIONMESSAGE4157(DFMSYN)PARAMETERSFORSPARSEDECOMPOSITIONOFDATABLOCKKLL(TYPE=RDP)FOLLOWMATRIXSIZE=167697ROWSNUMBEROFNONZEROES=3411018TERMSNUMBEROFZEROCOLUMNS=0NO.OFZERODIAGONALTERMS=0CPUTIMEESTIMATE=337SECI/OTIMEESTIMATE=2SECMINIMUMMEMORYREQUIREMENT=2024KWORDSMEMORYAVAILABLE=76090KWORDSMEMORYREQR'DTOAVOIDSPILL=6293KWORDSMEMUSEDBYBEND=3941KWORDSEST.INTEGERWORDSINFACTOR=16062KWORDSEST.NONZEROTERMS=28137KTERMSESTIMATEDMAXIMUMFRONTSIZE=1302TERMSRANKOFUPDATE=6LookforUIM4157in.f04file:MemoryavailableMemoryrequiredtoavoidspillMemory&MSC.NastranSohowmuchRAMdoesanMSC.Nastranrunneed?DependsonproblemsizeToolittleinefficientexecutionToomuchinefficientexecution“estimate”programcanhelpUsingthe“estimate”programRunthe“estimate”programfirsttogetRAM&disksizingrequirementsHowdoIdothat?msc2001estimateyour.bdfESTIMATE-(Version2001.0Oct22200218:02:53)Readinginputfile“your.bdf“Pleasewait...148648lines.MSC.NastranV2001.0BulkDataSummarySOL:101DOF:166619(counted)Suggestionsforrunningthisjobona32-bitsystem.Activerules:456111213Online2offile“your.bdf“:NASTRANSPARSE=1[Rule5]DeleteSPARSE=1.EstimatedResourceRequirementsona32-bitsystem:Memory:32.0MBDisk:952.7MBDBALL:676.1MBSCRATCH:338.1MBSCR300:112.9MBmsc2001estimateyour.bdfRAM&diskestimatesSpecificAdviceGeneralmodelsizeinfoSuggestionsforrunningthisjobona32-bitsystem.Activerules:456111213Online2offile“your.bdf“:NASTRANSPARSE=1[Rule5]DeleteSPARSE=1.Advice&activerulesSpecificAdviceAdviceandactiverulescanbefoundinthe“Installation&OperationsGuide”,Section6.2(Utilities/Estimate)5.SelectthesparsesolverDeleteSPARSEDeleteUSPARSEdensity12.0SPARSE=1USPARSE=0density12.0EstimatedResourceRequirementsona32-bitsystem:Memory:32.0MBDisk:952.7MBDBALL:676.1MBSCRATCH:338.1MBSCR300:112.9MBMemory&DiskestimatesRAM&diskestimatesBallparksizeestimatesFYI:Actualusagewas:Memory:30MBDBALL:702MBSCRATCH:68MBSCR300:101MBMemory&DiskestimatesActualmileagewillvary!Memory&diskusagedependupon:Solutiontype(statics,modes…)Scratchrun?SPCs,MPCs,rigidelementsElement-typemix(0-,1-,2-,3-D)EdgedensityOutputrequestsSuperelementsorreductionFormoredetail,use“verbose”keyword:msc2001estimateyour.bdfverbose=yesMSC.NastranV2001.0BulkDataSummarySOL:101Scratch:NoEigenvalueanalysis:NoSuperelement:NoMPCSID:1SPCSID:1Strainoutput:NoStressoutput:NoAUTOSPC:YesK6ROT:0FormGOATmatrix:NoGrids:316240-Delements:14511-Delements:458032-Delements:378043-Delements:0Memory&DiskestimatesSnippetfrom“verbose”outputAllocatedRAMv.Time050100150200250300050100150200MemoryAllocated(MB)Time(sec)ElapsedTime(sec)CPUTime(sec)EstimateMBestimate!ElapsedTimeCPUTimeTopics:AllocatingMemoryHowmemoryisusedUsingthe“estimate”programJob-submitkeywordsHandykeywordstoknowaboutCustomizingyoursettingsMakingyourownnastrcfileCommandlinekeywordsFormatofthe“nastran”command:nast2001*your.bdfkeyword1=value1keyword2=value2keyword3=value3…keywordn=valuenForexample:nast2001*your.bdfmem=200mbCommonKeywordsappend=[yes/no]out=pathjidtype=file-extpre=…&post=…pause=…sysn=…mem=…buffsize=…smem=…sdball&sscrscr=[yes/no/mini]news=[yes/no]old=[yes/no]SeeInstallation&OperationsGuide,AppendixBmem=estimateLet“estimate”dothework!(default)Run&loadresultsfrom“estimate”nast2001bdfmem=estimate050100150200250300050100150200MemoryAllocated(MB)Time(sec)ElapsedTime(sec)CPUTime(sec)EstimateMBestimate!ElapsedTimeCPUTimemem=sizeUser-sp