怎么梁在单元节点处力未传递，求高手指教，解答

风景

[img]I:\self study\ANSYS\exercise\截面chaoxiang\结果\部分未受力.bmp[/img]
下面是命令流
*SET,l,32   
*SET,h,5.5  
*SET,l1,4   
/prep7  
/units,si   
et,2,beam189
et,1,link8  
r,1,1.185e-3
mp,ex,1,3e11
mp,prxy,1,0.3   
k,1,
k,9,l   
kfill,1,9,7,2   
k,10,4,h
k,17,28,h   
kfill,10,17,6,11
*do,i,1,8   
l,i,i+1
*enddo  
*do,i,10,16
l,i,i+1
*enddo  
l,1,10  
l,9,17  
*do,i,2,8   
n,i,4*(i-1)
*enddo  
*do,i,1,7   
n,i+9,4*i,h
*enddo  
e,2,10  
e,10,3  
e,3,11  
e,11,4  
e,4,12  
e,4,13  
e,5,13  
e,13,6  
e,6,14  
e,15,6  
e,7,15  
e,7,16  
e,16,8  
lsel,s,loc,y,0  
cm,diliang,line
lsel,s,loc,y,0.01,h
cm,dingliang,line   
esel,all
cm,xuanliang,elem   
cmsel,s,xuanliang   
cmsel,s,diliang
cmsel,a,dingliang   
lesize,all,,,40
sectype,1,beam,i,dingliang  
secdata,0.3,0.3,0.2,0.01,0.01,0.01  
sectype,3,beam,i,diliang
secdata,0.4,0.4,0.3,0.01,0.01,0.01  
k,300,,,100000                                   !z
k,301,,100000   
CMSEL,S,DILIANG
CMPLOT  
latt,1,,2,,,301,3   
CMSEL,S,DINGLIANG   
CMPLOT  
lsel,r,loc,y,h  
latt,1,,2,,,301,1   
CMSEL,S,DINGLIANG   
CMPLOT  
lsel,u,loc,y,h  
latt,1,,2,,,300,1   
CMSEL,S,XUANliang   
CMPLOT  
TYPE,   1   
MAT,       1
REAL,       1   
ESYS,       0   
SECNUM,   1
alls
cmsel,s,diliang
cmsel,a,dingliang   
lmesh,all   
alls
nummrg,all  
nsel,s,loc,y,0  
nsel,u,loc,x,0.0001,31.9999
d,all,all   
nsel,s,loc,x,16
nsel,r,loc,y,0  
f,all,fy,-10000
nsel,s,loc,x,12,20  
nsel,r,loc,y,0  
nsel,u,loc,x,12.001,19.999  
f,all,fy,-5000  
finish  
/SOLu   
SOLVE   
finish  
/post1
plesol,s,eqv
PLDISP          !显示变形图
PRDISP

finish
求高手指教，多谢！