单箱多室是不是与能用壳单元建模型

songid123

我想用壳单元建个单箱多室梁的模型，但是怎么也计算不了，总是有问题，希望高手指点

FINISH
/CLEAR
/PREP7
L =20
TF = 0.45
TH = -0.25
B = 18
H = 1.3
WPROTA,,90
BLC4,0,0,18,L
WPCSYS,-1
WPROTA,,90
WPOFFS,2.525
WPROTA,,90
WPROTA,,,90
*DO,I,1,6
BLC4,0,0,L,H
WPOFFS,,,2.59
*ENDDO
WPCSYS,-1
WPOFFS,2.525,-1.3
WPROTA,,90
BLC4,,,12.95,L
WPCSYS,-1
NUMMRG,ALL

ET,1,shell63
MP,EX,1,3.45E6
MP,PRXY,1,0.3
!MP,DENS,1,2.6e4  质量密度
R,1,TF
R,2,TH

ASEL,S,loc,y,0
ASEL,A,loc,y,-1.3
AATT,1,2,1

lesize,3,,,20
lesize,31,,,20
lesize,4,,,20
lesize,2,,,20
!esize,0.2
MSHKEY,1
AMESH,all
ASEL,S,,,2,7
AATT,1,1,1

lesize,6,,,13
lesize,10,,,13
lesize,14,,,13
lesize,18,,,13
lesize,22,,,13
lesize,26,,,13
MSHKEY,1
AMESH,all
MSHKEY,1
AMESH,ALL

/SOLU   
NSEL,S,LOC,Z,0
NSEL,R,LOC,Y,-1.3
D,ALL,ALL
NSEL,S,LOC,Z,20
NSEL,R,LOC,Y,-1.3
D,ALL,UX,0,,,,UY
SFL,5,PRES,10000
ALLSEL
SOLVE

si13

出现什么错误？

songid123

file://C:\Documents and Settings\Administrator\桌面\QQ截图20120411215050.png
file://C:\Documents and Settings\Administrator\桌面\QQ截图20120411215107.png

songid123

si13 发表于 2012-4-11 20:28
出现什么错误？

file://C:\Documents and Settings\Administrator\桌面\QQ截图20120411215050.png
file://C:\Documents and Settings\Administrator\桌面\QQ截图20120411215107.png
就是这两个，我是不是不能这样子建模型，因为看个例子是单箱单室的，所以就想建个单箱多室的，顶板底板厚度是0.45m，腹板是0.25m，所以分别实常数赋值，壳单元不是很了解，向您请教了，希望能指点一下

songid123

还有请教一下，两个实常数，要如何划分网格？