关于ansys梁架的应力分析问题

单元4、74 Z坐标出现问题，why，高手指点
APDL：:~
/prep7
/pnum,node,on
n,1
n,10,,9
fill,1,10,8
ngen,2,10,1,10,1,1.5
ngen,2,20,1,10,1,1.5,,1.5
ngen,2,30,1,10,1,,,1.5
et,1,1
r,1,8e-4
et,2,4
r,2,2.26e-3,2.1e-6
type,1
*do,i,1,9
e,i,i+10
e,i+10,i+20
e,i+20,i+30
e,i,i+30
*enddo
*do,j,1,4
*do,i,10*(j-1)+1,10*j-1
e,i,i+1
*enddo
*enddo
*do,i,1,9
e,i,i+11
e,i+11,i+20
e,i+20,i+31
e,i+31,i
*enddo
type,2
e,10,20
e,20,30
e,30,40
e,10,40
*do,i,1,4
d,(i-1)*10+1,all,0
*enddo
sfbeam,110,2,pres,,12.5e3
finish
/solu
solve
finish
/post1
pldisp,1
presol,s,equ