求助预应力怎么加？

zhentui

我按如下apdl做发现没有预应力文件 ，或者为0。是不是路径不对还是其他原因。
finish
/filename,try01,1
/prep7
et,1,42
ex,1,2e11
prxy,1,0.3
dens,1,7850
blc4,,,1,2
esize,0.1
amesh,all
/solu
nsel,s,loc,y,0
d,all,uy,0
nsel,s,loc,x,0
nsel,a,loc,x,1
d,all,ux,0
allsel
acel,,10,
instate,write,1,,s
solve
finish
/clear,nostart
/filname,try02
/prep7
et,1,42
ex,1,2e11
prxy,1,0.3
dnes,1,7850
blc4,,,1,2
esize,0.1
amesh,all
/solu
d,all,all
isfile,read,try01,ist,,2
isfile,list
outres,all,all
allsel
solve
finish
/filename,try03,1
/solu
lsclear,all
nsel,s,loc,y,0
d,all,uy,0
nsel,s,loc,x,0
nsel,a,loc,x,1
d,all,ux,0
allsel
ldread,reac,1,1,,,'try02','rst'
solve
sfl,3,pres,1e5
allsel
solve
/post1
plnsol,u,y