我先用特征值分析,可是求解完以后在后处理中没有数据。之后我用弧长法,可总是不收敛,用自动打开线性搜索和自动时间步长虽能收敛可是所得曲线于理论值有差距,且不光滑。麻烦各位大侠帮我看看。具体数据和命令流如下:拱用beam188,截面是圆钢管508×12,弹性模量是2.06e11pa,跨度是40米,矢跨比是0.25。
/units,si
/prep7 !define material and parameter!
et,1,beam188
mp,prxy,1,0.3
mp,ex,1,2.06e11
MPTEMP,1,0
SECTYPE, 1, BEAM, CTUBE, 1, 0
SECOFFSET, CENT
SECDATA,0.242,0.252,8,0,0,0,0,0,0,0
k,1, !modling!
k,2,40
k,3,20,10
LARC, 1, 2, 3
lesize,all,,,20
lmesh,all
finish
/solu ! give loads!
d,1,ux,0,,,,uy,uz
d,2,ux,0,,,,uz,uy
f,12,fy,-100
antype,0
outpr,all,all
outres,all,all
pstres,on
solve
save
FINISH
/solu
antype,1
bucopt,lanb,1
mxpand,1
outpr,all,all
outres,all,all
solve
save
finish
/post1
set,first,
finish
/solu
upcoord,0.01,off
save
antype,0
nlgeom,on
sstif,on
nsubst,100
arclen,on,4
outres,,1
f,12,fy,-600000
solve
save
finish
/post26
nsol,2,12,u,y
prod,3,2,,,,,,-1
prod,4,1,,,,,,600
/axlab,x,deflecion
/axlab,y,loads
xvar,3
plvar,4
finish |