!EX9.5 大變形預應力模態分析
finish
/clear
/prep7
et,1,beam3
mp,ex,1,2.1e11
mp,prxy,1,0.3
mp,dens,1,7800
r,1,0.06,0.00045,0.3
k,1
k,2,6
l,1,2
lesize,all,,,20
lmesh,all
dk,1,all
fk,2,fy,-1e6
fk,2,fx,-6e6
finish
/solu
antype,0
nlgeom,on
pstres,on
nsubst,20
outres,all,all
ematwrite,yes
solve
finish
/solu
antype,2
upcoord,1,on
pstres,on
modopt,lanb,3
mxpand,3
psolve,eiglanb
finish

/solu
expass,on
psolve,eigexp
finish

/post1
set,list