ansys桁架屈曲分析实例
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一、桁架结构屈曲分析实例
命令流
！步骤一前处理
/TITLE,buckling of a frame
/PREP7
ET,1,BEAM4
R,1,2.83e-5,2.89e-10,2.89e-10,0.01,0.01, ,
RMORE, , , , , , ,
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,1.5e11
MPDATA,PRXY,1,,0.35
RPR4,3,0,0,86.6025e-3,
VOFFST,1,1, ,
/VIEW,1,1,1,1
/ANG,1
/REP,FAST
VDELE, 1
FLST,2,5,5,ORDE,2
FITEM,2,1
FITEM,2,-5
ADELE,P51X
LPLOT
FLST,5,3,4,ORDE,2
FITEM,5,7
FITEM,5,-9
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
LESIZE,_Y1, , ,20, , , , ,0
FLST,5,6,4,ORDE,2
FITEM,5,1
FITEM,5,-6
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
LESIZE,_Y1, , ,3, , , , ,0
FLST,3,6,4,ORDE,2
FITEM,3,4
FITEM,3,-9
LGEN,15,P51X, , , , ,1, ,0 /PLOPTS,INFO,3
/PLOPTS,LEG1,1
/PLOPTS,LEG2,1
/PLOPTS,LEG3,1
/PLOPTS,FRAME,1
/PLOPTS,TITLE,1
/PLOPTS,MINM,1
/PLOPTS,FILE,0
/PLOPTS,LOGO,1
/PLOPTS,WINS,1
/PLOPTS,WP,0
/PLOPTS,DATE,2
/TRIAD,LTOP
/REPLOT NUMMRG,KP, , , ,LOW NUMCMP,KP NUMCMP,LINE FLST,2,93,4,ORDE,2 FITEM,2,1
FITEM,2,-93 LMESH,P51X
FINISH
！步骤二获得静力解/SOL
ANTYPE,0 NLGEOM,0 NROPT,AUTO, , LUMPM,0
EQSLV, , ,0, PRECISION,0 MSAVE,0 PIVCHECK,1 PSTRES,ON TOFFST,0,
/PNUM,KP,0
/PNUM,LINE,0
/PNUM,AREA,0
/PNUM,VOLU,0
/PNUM,NODE,1
/PNUM,TABN,0
/PNUM,SVAL,0
/NUMBER,0
/PNUM,ELEM,0
/REPLOT
/ZOOM,1,SCRN,1.332160,0.608101,1.398657,0.533799 FLST,2,3,1,ORDE,3
FITEM,2,1
FITEM,2,-2
FITEM,2,5
/GO
D,P51X, , , , , ,ALL, , , , ,
/AUTO,1
/REP,FAST
/ZOOM,1,SCRN,-0.654929,-0.576816,-0.635371,-0.619832 FLST,2,3,1,ORDE,3
FITEM,2,934
FITEM,2,-935
FITEM,2,938
/GO
F,P51X,FZ,-1
/PNUM,KP,0
/PNUM,LINE,0
/PNUM,AREA,0
/PNUM,VOLU,0
/PNUM,NODE,0
/PNUM,TABN,0
/PNUM,SVAL,0
/NUMBER,0
/PNUM,ELEM,0
/REPLOT
/STATUS,SOLU
SOLVE
FINISH
！步骤三获得特征值屈曲解
/SOLU
ANTYPE,1
BUCOPT,LANB,10,0,0
/STATUS,SOLU
SOLVE
FINISH
！步骤四扩展解
/SOLU
EXPASS,1
MXPAND,10,0,0,1,0.001,
/STATUS,SOLU
SOLVE
FINISH
！步骤五后处理/POST1
SET,LIST
SET,FIRST PLDISP,2
/AUTO,1
/REP,FAST
/VIEW,1,1
/ANG,1
/REP,FAST SET,LIST,999 SET,,, ,,, ,3
/REPLOT
SET,LIST,999 SET,,, ,,, ,5
/REPLOT
SET,LIST,999
/REPLOT
SET,LIST,999 SET,,, ,,, ,7
/REPLOT
SET,LIST,999 SET,,, ,,, ,9
/REPLOT AVPRIN,0, , ETABLE, ,LS,1 PRETAB,LS1 PLETAB,LS1,NOAV SET,FIRST
/REPLOT
/VIEW,1,1,1,1
/ANG,1
/REP,FAST SAVE
FINISH
/EXIT,NOSAV。