研讨会二部分应用了冲击频谱一使用选项结响应nastran培训workshop09b.pptxVIP

Workshop#9(PartII)AppliesTheShockSpectrumApplytheshockspectrumgeneratedinPartIandsumtheresponseusingtheSRSSoption.Includemodesupto1000Hzusing3%criticaldamping.

Workshop9(Part2)Usethefollowingpartialinputfileasastartingpoint$$wkshp9b.dat$$casecontrol,add:appropriatesolutionsequence$$bulkdata,add:applytheresponsespectrumcurvesgeneratedinrun9a.$usethesrsssummingmethod.$IDSEMINAR,PROB9bTIME30CENDTITLE=RESPONSESPECTRUMANALYSISSUBTITLE=USINGCALCULATEDSHOCKRESPONSELABEL=SHOCKWILLBEINPUTINZDIRECTIONECHO=UNSORTEDSET111=ALLDISPLACEMENT=111SPC=200SUBCASE1METHOD=100SDAMP=200DLOAD=500$

Workshop9(Part2)BEGINBULK$$PLATEMODELDESCRIBEDINNORMALMODESEXAMPLE$INCLUDEplate.bdfPARAM,COUPMASS,1PARAM,WTMASS,0.00259$$BOUNDRYCONDITIONSFOR`CLAMPEDMODES$SPC1,200,1245,1,12,23,34,45$$PLACEBIGFOUNDATIONMASS(BFM)ATBASE$TOSTIMULATE`CLAMPEDMODES$CMASS2,110,1000.,23,3$$RBEMASSTOREMAININGBASEPOINTS$RBE2,101,23,3,1,12,34,45$$SUPORTCARDTOIDENTIFYEXCITATIONDOFS$SUPORT,23,3$$EIGENVALUEEXTRACTION$MUSTBEMASSNORMALIZED(DEFAULT)$eigrl,100,0.,1000.$$TABLETOSPECIFYDAMPINGFORUSEINTHEANALYSIS$TABDMP1,200,CRIT,,0.,0.03,1000.,0.03,ENDT$$SPECIFICATIONOFSHOCKSPECTRUMTOBEUSED$$MODALFREQUENCYRANGECANBESELECTEDUSINGPARAM,LFREQ,0.1PARAM,HFREQ,1000.$ENDDATA

SolutionFileForWorkshop#9(PartII)IDSEMINAR,PROB9b

SOL103

TIME30

CEND

TITLE=RESPONSESPECTRUMANALYSIS

SUBTITLE=USINGCALCULATEDSHOCKRESPONSE

LABEL=SHOCKWILLBEINPUTINZDIRECTION

ECHO=UNSORTED

SET111=ALL

DISPLACEMENT=111

SPC=200

SUBCASE1

METHOD=100

SDAMP=200

DLOAD=500

$

BEGINBULK

$

$PLATEMODELDESCRIBEDINNORMALMODESEXAMPLE

$

INCLUDE’plate.bdf’

PARAM,COUPMASS,1

PARAM,WTMASS,0.00259

$

$BOUNDRYCONDITIONSFOR‘CLAMPED’MODES

$

SPC1,200,1245,1,12,23,34,45

$

$

$PLACEBIGFOUNDATIONMASS(BFM)ATBA