关于热耦合做屈曲褶皱的疑问！！！

shaoyun1987

各位版友同志，本人做一个0.05mm厚的薄膜在不均匀温度分布的情况下的褶皱产生情况，原来用的是shell157,转变单元shell63.可以实现屈曲与非线性计算。只是算出来位移等都不是对称的情况。有些怀疑，也没试验来验证。
下面有老师说shell157是热电单元，我就选用shell57，结构时转变单元依旧是shell63，可是虽然热分析时可以得到相同的结果，但是屈曲分析时却不能成功，请问大家为什么呢？
下面是命令流，大家可以帮忙看一下，不甚感激！
finish
/clear,nostart
/filename,2010-3-26-thermal-force
/title,tuobang
/units,si
/prep7
et,1,shell157
r,1,0.00005
mp,kxx,1,0.3
rectng,0,1,0,1
esize,0.02
amesh,all
finish
!
/solu
antype,static
nsel,s,loc,x,0
d,all,temp,20
nsel,s,loc,x,1
d,all,temp,150
allsel
outpr,basic,all
solve
finish
!
/prep7
etchg,tts
mp,ex,1,2.2063e8
mp,alpx,1,-1e-4
mp,alpy,1,-1e-4
mp,prxy,1,0.38
allsel
!
/solu
antype,static
pstres,on
nsel,s,loc,x,0
d,all,all
nsel,s,loc,x,1
d,all,ux,0.003
asel,all
ldread,temp,,,,,,rth
allsel
solve
finish
!
/solu
antype,1
bucopt,subsp,16,0,0
bucopt,lanb,20,0,0
mxpand,1,0,0,0,0.001
solve
finish
!
/prep7
upgeom,0.01,1,1,'2010-3-26-thermal-force','rst',''
!
/solu
antype,0
nlgeom,1
autots,on
neqit,25
lnsrch,on
nropt,full,,off
deltim,0.04,0.000001,0.04
outres,erase
outres,all,1
rescontrl,dedine,all,1,1
allsel
solve
finish

shaoyun1987

不会吧，这个问题都没人理睬？

shaoyun1987

大家来看看嘛，论坛的人气明星呢

shaoyun1987

这么有价值的课题没人理啊