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1、!ANSYS響應(yīng)譜分析!響應(yīng)譜分析實例-平板結(jié)構(gòu)finish/CLEAR/FILENAME,example,1/PREP7/TITLE,DYNAMICLOADEFFECTONSIMPLY-SUPPORTEDTHICKSQUAREPLATE!定義單元類型ET,1,SHELL281!定義厚度SECTYPE,1,SHELLSECDATA,1,1,0,5!定義材料屬性MP,EX,1,200E9MP,NUXY,1,0.3MP,ALPX,1,0.1E-5MP,DENS,1,8000!定義模型N,1,0,0,0N,9,0,10,0FILLNGEN,5,4
2、0,1,9,1,2.5N,21,1.25,0,0N,29,1.25,10,0FILL,21,29,3NGEN,4,40,21,29,2,2.5EN,1,1,41,43,3,21,42,23,2EGEN,4,2,1EGEN,4,40,1,4FINISH/SOLUANTYPE,MODAL!定義分析類型為模態(tài)分析MODOPT,REDUCMXPAND,16,,,YESSFE,ALL,,PRES,,-1E6!施加面載荷D,ALL,UX,0,,,,UY,ROTZ!施加約束D,1,UZ,0,0,9,1,ROTXD,161,UZ,0,0,169,1,ROT
3、XD,1,UZ,0,0,161,20,ROTYD,9,UZ,0,0,169,20,ROTYNSEL,S,LOC,X,.1,9.9NSEL,R,LOC,Y,.1,9.9M,ALL,UZ!選擇主自由度NSEL,ALLSOLVE*GET,F,MODE,1,FREQFINISH/SOLUANTYPE,SPECTR!定義分析類型SPOPT,PSD,2,ON!利用前兩階模態(tài)并計算應(yīng)力PSDUNIT,1,PRES!定義功率譜為面載荷譜DMPRAT,0.02PSDFRQ,1,1,1.0,80.0PSDVAL,1,1.0,1.0LVSCALE,1!比例使用載
4、荷因子PFACT,1,NODEPSDRES,DISP,RELPSDCOMSOLVEFINISH/eof/POST1SET,3,1!讀取位移/VIEW,1,2,3,4PLNSOL,U,ZPRNSOL,U,ZFINISH/SOLUTIONANTYPE,HARMIC!重新定義求解類型HROPT,MSUP!利用模態(tài)疊加法HROUT,OFF,ONKBC,1HARFRQ,1,80DMPRAT,0.02NSUBSTEP,10SOLVEFINISH/POST26FILE,,rfrqPRCPLX,1NSOL,2,85,U,Z!定義變量PSDDAT,6,1,1
5、.0,80,1.0PSDTYP,2PSDCAL,7,2PSDPRTPRVAR,2,7!繪制變量曲線*GET,P,VARI,7,EXTREM,VMAX*status,parm/VIEW/AXLAB,Y,PSD(M^2/HZ)PLVAR,7FINISH
