ansys非线性屈曲分析求教
小弟对一个薄壁墩顺利进行特征值稳定分析之后求解非线性屈曲极限荷载，一直循环不止，求教！命令流如下：hm=1
w1=0.60
w2=0.40
w3=0.60
m=50
/filnam,sheel-pole
/view,1,1,1,1
/prep7
!国际单位制
!设计常量
h=50
wh=12!横向宽
wz=2.5 !侧面顶宽
wzb=wz+2*h/m !侧面底宽
k,1,0,h-hm/2,0
k,2,-wz/2+w3/2,h-hm/2,0
k,3,-wz/2-(h-hm/2)/m+w3/2,0,0
kgen,2,1,3,1,,,wh/2-w1/2
k,7,0,0,0
k,8,0,0,wh/2-w1/2
a,1,2,5,4
a,2,5,6,3
a,4,5,6,8
/PREP7
et,1,shell63,,1 !keopt(2)=1
mp,dense,1,2650
mp,ex,1,3.45e10
mp,prxy,1,0.1667
r,1,hm/2
r,2,w3
r,3,w2
r,4,w1
et,2,shell63 !刚性板
mp,dense,2,7850
mp,ex,2,3.45e12
mp,prxy,2,0.3
r,5,3
smrt,8 !应该指定分网精细度
allsel
asel,s,,,1
aatt,1,1,1
mshape,0,2d
mshkey,2
amesh,all
asel,s,,,3
aatt,1,4,1
mshkey,2
amesh,all
asel,s,,,2
aatt,1,2,1
mshkey,2
amesh,all
allsel
nsym,x,210,all
allsel
esym,,210,all
nummrg,node
allsel
!nsel,u,loc,z,0,0.01
nsym,z,420,all
allsel
esym,,420,all
nummrg,node
numcmp,node
nummrg,elem
numcmp,elem
a,1,2,3,7
asel,s,,,4
aatt,1,3,1
mshkey,2
amesh,all
!施加墩底约束
esel,s,type,,1
nsle,s,all
csys,0
nsel,r,loc,y,0
d,all,all
allsel
!各种工况下的荷载
/solu
antype,static
pstres,on
allsel
nsel,s,loc,y,h-hm/2,,
!acel,,9.8
f,all,fy,-100
allsel
solve
finish
/solu
antype,buckle
bucopt,subsp,5
!expass,on
!mxpand,2
solve
finish
/post1
set,first
*get,eigenload,mode,1,freq
pldisp,2
set,next
pldisp,2
finish
/config,nres,100
/prep7
tb,biso,1,1,2
tbtemp,0
tbdata,,2e8,0
upgeom,0.1,1,1,sheel-pole,rst
finish
/solu
antype,0
nlgeom,1
outres,all,all
arclen,1,0,0
arctrm,u,0.25e-5,node(0,h-hm/2,0),ux
nsubst,20,,,1
solve
finish
/post26
nsol,2,node(0,h-hm/2,0),u,x,deflection
rforce,3,node(0,0,0),f,y,load
/axlab,x,deflection
/axlab,y,load
xvar,2
plvar,3 看看再说 不过我建议版主把这个帖子发到ANSYS板块可能会很快得到解答，或者是楼主自己转过去 现传上《ANSYS Workbench基础教程与实例详解（第二版）》中的一个实例，
详细操作过程如下面的图片所示，希望对大家在WB中进行非线性屈曲分析有所帮助 这个数挺好的，不错，呵呵
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