非线性屈曲不收敛（符命令流）

shimly521

帮助看一下我的非线性屈曲分析为什么不收敛啊！！！好郁闷啊！！:'(
finish
/clear,start
/filname,pipeline-5,1
/title,buckling of pipeline
/com,structural
/unit,si
/config,nres,1100000
*set,max_deffect,0.004

*dim,x,,10
*dim,y,,10
*dim,z,,10

/PREP7
l=30
e=6
ET,1,BEAM189
MP,EX,1,2e11
MP,PRXY,1,0.3
!define section data   
SECTYPE,1,BEAM, CTUBE,,0   
SECOFFSET, CENT  
SECDATA,0.295,0.299,,0,0,0,0,0,0,0

!define keypoints  
/view,1,1,1,1

k,1,
k,2,0,0,l
l,1,2
LATT, 1, , 1, , , , 1   
esize,e
lmesh,all

save
finish
/solu
d,1,ux
d,1,uy
d,1,rotx
d,2,ux
d,2,uy
d,2,uz
allsel
fk,1,fz,1
allsel
pstres,on
outrr,,1
solve
save
finish
/solu
antype,1
bucopt,subsp,1,0,0
subopt,1,
mxpand,1,0,0,0,0.001
solve
finish
/post1
set,list
set,first
*get,pressure1,mode,1,freq
nsort,u,sum
*get,max_disp_sum,sort,,max
*set,scale_factor,max_deffect/max_disp_sum
/prep7
f,1,fz,1.2*pressure1

upgeom,scale_factor,1,1,'pipeline-5','rst',''
finish
/solu
antype,0
nlgeom,on
nsubst,10000
arclen,on,2
arctrm,l

solve
finish

/post26
nsol,2,7,u,y,uy_2
prod,3,1,,,,,,1.2*pressure1,1,1
/axlab,x,Dis-x(m)
/axlab,y,Pres(Pa)
xvar,2
plvar,3
prvar,3

[ 本帖最后由 xinyuxf 于 2007-3-17 19:43 编辑 ]

AaronSpark

运行过程中出现警告：

Both solid model and finite element model boundary conditions have been
applied to this model.  As solid loads are transferred to the nodes or  
elements, they can overwrite directly applied loads.

载荷有问题，参考下面两个帖子
http://forum.vibunion.com/forum/viewthread.php?tid=35223
http://forum.vibunion.com/forum/viewthread.php?tid=31708

shimly521

好像不是这个原因啊