帮我看看一个命令，为什么不能计算
fini/clear
/prep7
et,1,beam188
mp,ex,1,206000
mp,prxy,1,0.3
sectype,1,beam,L
secdata,50,50,4,4
et,2,mpc184
r,1,1,1,1,1,1
k,1,
k,2,150
k,3,450
k,4,750
k,5,1050
k,6,1350
k,7,1650
k,8,1800
l,1,2
l,2,3
l,3,4
l,4,5
l,5,6
l,6,7
l,7,8
lesize,all,50
latt,1,,1
secnum,1
lmesh,all
DK,1,UX
DK,1,UY
DK,1,UZ
DK,1,ROTX
DK,8,UY
DK,8,UZ
DK,8,ROTX
n,50,150,-81.3,
n,51,450,-81.3,
n,52,750,-81.3,
n,53,1050,-81.3,
n,54,1350,-81.3,
n,55,1650,-81.3,
n,56,150,-81.3,-17
n,57,450,-81.3,-17
n,58,750,-81.3,-17
n,59,1050,-81.3,-17
n,60,1350,-81.3,-17
n,61,1650,-81.3,-17
type,2
real,1
e,2,50
e,5,51
e,11,52
e,17,53
e,23,54
e,29,55
e,56,50
e,57,51
e,58,52
e,59,53
e,60,54
e,61,55
allsel
nsel,s,node,,56,61,1
f,all,fy,-337
f,all,fz,306
allsel
/solu
solve
/post1
plnsol,s,int
esel,s,type,,1
看你的命令流，应该可以计算的，但是可能不能显示应力结果
不知出现什么问题？你可以看一下节点位移的结果是否存在。
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