题目如图示
命令流
finish
/clear,start
/prep7
!上旋
!建立点
K,1,0,0
K,2,10.6,0
k,3,10.6*2,0
k,4,10.6*3,0
!网格
L,1,2
L,2,3
L,3,4
!定义材料,单元划分
ET,1,beam4
mp,ex,1,2.1*10**8
mp,prxy,1,0.3
r,1,0.0270,0.00013530,0.00171,0.6,0.3,0,0,0,0,0
esize,,5
lmesh,all
!下旋
!定义点
K,6,10.6,0,-1.5
K,7,10.6,0,-1.5
K,9,10.6,0,-1.5
K,10,2*10.6,0,-1.5
K,11,2*10.6,0,-1.5
K,13,2*10.6,0,-1.5
K,5,0,0
K,8,10.6,0
k,12,2*10.6,0
K,14,3*10.6,0
!定义网格
L,5,6
L,7,8
L,9,10
L,11,12
L,13,14
!定义下旋材料,单元划分
lsel,s,line,,4,8,1
ET,2,link8
mp,ex,2,2.1*10**8
r,2,0.00696
mat,2
type,2
real,2
esize,,5
lmesh,all
allsel,all
!定义荷载
lsel,s,line,,1,3,1
esll
sfbeam,all,1,pres,7.6411,7.6411
allsel,all
FK,2,FZ,-11
FK,3,FZ,-11
!定义支座
dk,1 ,uy,0
dk,1 ,Ux,0
dk,1 ,Uz,0
dk,4 ,uy,0
dk,4 ,Ux,0
dk,4 ,Uz,0
!耦合点
CPINTF,ux
CPINTF,uy
CPINTF,uz
/solu
solve
/post1
etable,i,smisc,5
etable,j,smisc,11
plls,i,j,0.3
出错信息
*** WARNING *** CP = 21.141 TIME= 12:28:11
Small equation solver pivot term encountered at UZ DOF of node 31.
ANSYS automatically constrained this DOF. Check for an insufficiently
constrained model.
*** ERROR *** CP = 21.141 TIME= 12:28:11
The value of UZ at node 31 is 4.642971945E+12. It is greater than the
current limit of 1000000. This generally indicates rigid body motion
as a result of an unconstrained model. Verify that your model is
properly constrained.
如果我把 Link8改成beam4,计算正常,如果使用如命令流中的link8,出错见上面信息。
请有耐心的朋友帮我看看,谢谢。
[ 本帖最后由 ameise 于 2008-5-15 19:04 编辑 ] |