patrannastran教程第11章隨機(jī)響應(yīng)分析

常見(jiàn)的例子如引起的地基運(yùn)動(dòng)、海洋波浪高度和頻率、航天器和高聳建筑物MSC/NASTRAN對(duì)隨機(jī)響應(yīng)分析是作為頻率響應(yīng)后處理進(jìn)行的。輸入包括頻率MSC/NASTRAN 1)單輸入分析（完全相關(guān)輸入如需要Hja(ω由情況控制卡RANDOMSID自譜密度，J=K,X為大于0的整數(shù)，Y為TID=0,IDSEMINAR,PROB10SOL111TIME30TITLE=RANDOM YSIS-BASEEXCITATIONSUBTITLE=USINGTHEMODALMETHODWITHLANCZOSECHO=UNSORTEDSPC=SET111=33,55,ACCELERATION(SORT2,PHASE)=METHOD=FREQUENCY= =RANDOM=DLOAD=XTGRID=YESYTGRID=YESXBGRID=YESYBGRID=YESYTLOG=YESXTITLE=YTTITLE=ACCELRESPONSEBASE,MAGNITUDEYBTITLE=ACCELRESPONSEATBASE,PHASEXYPLOTACCELRESPONSE/9999(T3RM,T3IP)YTTITLE=ACCELRESPONSEATTIPCENTER,YBTITLE=ACCELRESPONSEATTIPCENTER,PHASEXYPLOTACCELRESPONSE/33(T3RM,T3IP)YTTITLE=ACCELRESPONSEATOPPOSITECORNER,MAGNITUDEYBTITLE=ACCELRESPONSEATOPPOSETECORNER,PHASEXYPLOTACCELRESPONSE/55(T3RM,T3IP)$$PLOTOUTPUTISONLYMEANSOFVIEWINGPSD$XGRID=YESYGRID=YESXLOG=YESYLOG=YESYTITLE=ACCELPSDATLOADEDCORNERXYPLOTACCELPSDF/9999(T3)YTITLE=ACCELPSDATTIPCENTERXYPLOTACCELPSDF/33(T3)YTITLE=ACCELPSDATOPPOSITECORNERXYPLOTACCELPSDF/55(T3)$BEGINBULK$INCLUDE’$GRID,9999,,0.,0.,$RBE2,101,9999,12345,1,12,23,34,$SPC1,101,12456,$CONM2,6000,9999,,$$MAT1,1,.1,,.1,$$EIGENVALUEEXTRACTION$EIGRL,100,,$$SPECIFYMODAL$TABDMP1,100,+,0.,.03,10.,.03,$$POINTLOADINGATTIP$RLOAD2,100,600,,,$TABLED1,+,10.,1.,1000.,1.,$DAREA,600,9999,3,$$SPECIFYFREQUENCY$$SPECIFYSPECTRAL$RANDPS,100,1,1,1.,0.,$TABRND1,+,20.,0.1,30.,1.,100.,1.,500.,+,1000.,.1,

IDSEMINAR,PROB11SOL111TIME30TITLE=FREQUENCYRESPONSEWITHPRESSUREANDPOINTLOADSSUBTITLE=USINGTHEMODALMETHODWITHLANCZOSECHO=UNSORTEDSPC=1SET111=11,33, CEMENT(PLOT,PHASE)=111METHOD=100FREQUENCY= =RANDOM=SUBCASELABEL=PRESSURELOADDLOAD=100LOADSET=SUBCASELABELCORNERLOADDLOAD=200LOADSET=$OUTPUT$XTGRID=YESYTGRID=YESXBGRID=YESYBGRID=YESYTLOG=YESYBLOG=NOXTITLE=FREQUENCYYTTITLE=DISCEMENTRESPONSEATLOADEDCORNER,MAGNITUDEYBTITLE=DISCEMENTRESPONSEATLOADEDCORNER,PHASEXYPLOTDISPRESPONSE/11(T3RM,T3IP)YTTITLE=DISCEMENTRESPONSEATTIPCENTER,MAGNITUDEYBTITLE=DISCEMENTRESPONSEATTIPCENTER,PHASEXYPLOTDISPRESPONSE/33(T3RM,T3IP)YTTITLE=DISCEMENTRESPONSEATOPPOSITECORNER,MAGNITUDEYBTITLE=DISCEMENTRESPONSEATOPPOSITECORNER,PHASEXYPLOTDISPRESPONSE/55(T3RM,T3IP)$$PLOTOUTPUTISONLYMEANSOFVIEWINGPSD$XGRID=YESYGRID=YESXLOG=YESYLOG=YESYTITLE=DISPPSDATLOADEDCORNERXYPLOTDISPPSDF/11(T3)YTITLE=DISPPSDATTIPCENTERXYPLOTDISPPSDF/33(T3)YTITLE=DISPPSDATOPPOSITECORNERXYPLOTDISPPSDF/55(T3)$BEGINBULK$$MODELDESCRIBEDINNORMALMODES$INCLUDE’$$EIGENVALUEEXTRACTION$EIGRL,100,10.,$$SPECIFYMODAL$TABDMP1,100,+,0.,.03,10.,.03,$$FIRST$RLOAD2,100,300,,,$TABLED1,+,10.,1.,1000.,1.,$$UNITPRESSURELOADTO$LSEQ,100,300,$PLOAD2,400,1.,1,THRU,$$SECOND$RLOAD2,200,600,,,$$POINTLOADATTIP$DAREA,600,11,3,$$SPECIFYFREQUENCY$FREQ1,100,20.,20.,$$SPECIFYSPECTRAL$$TABRND1,+,20.,0.1,30.,1.