beam188单元蠕变无变化

finish
/clear
/prep7
/title,the analyse of the steel arch
et,1,82
cyl4,0.14,0.14,0.14,,0.135
allsel
smrtsize,5
amesh,all
secwrite,gg,sect,,1
sectype,1,beam,mesh
secoffset,cent,,,
secread,'gg','sect',,mesh
asel,all
aclear,all
adele,all,,,1
cyl4,0.14,0.14,0.135
allsel
smrtsize,5
amesh,all
secwrite,hnt,sect,,1
sectype,2,beam,mesh
secoffset,cent,,,
secread,'hnt','sect',,mesh
asel,all
aclear,all
adele,all,,,1
etdele,1
et,1,beam188
mp,ex,1,2.1e11
mp,dens,1,7800
mp,prxy,1,0.3
et,2,beam188
mp,ex,2,3.5e10
mp,dens,2,2600
mp,prxy,2,0.1667
n,1
n,2,0,0.6
type,1
mat,1
r,1
secnum,1
e,1,2
type,2
mat,2
r,2
secnum,2
e,1,2
tb,creep,2,,,2
tbdata,1,8e-10,1,0.3,0
/solu
d,1,all
f,2,fy,-161600
bfunif,temp,100
time,0.251584346
kbc,1
nsubst,500
outres,all,all
solve
finish
/post1
pldisp,1
为什么算出来的节点位移和加不加徐变没有任何变化呢