我用的是shell63号单元，可是在求解的时候不知道为什么总单元实常数提示出错，以及相应的材料属性出错，请各位帮我看看啊！（我用的单位是mm）如果有错请问如何改正？谢谢~
/CLEAR
/FILNAME,ANALYSIS
/TITLE,FENXI
/PREP7
et,1,63
r,1,0.02 !三个不同的板厚度
r,2,0.04
r,3,0.012
mp,ex,1,2e11！三种材料特性
mp,prxy,1,0.3
mp,dens,1,5800
mp,ex,2,2e11
mp,prxy,2,0.3
mp,dens,2,6000
mp,ex,3,2e11
mp,prxy,3,0.25
mp,dens,3,7800
K,1
K,2,1000
K,3,1000,2000
K,4,0,2000
k,5,0,0,5000
l,1,2
l,2,3
l,3,4
l,4,1
l,1,5
ADRAG,1,2,3,4,,,5
ldele,5,,,1
NUMMRG,ALL, , , ,LOW
NUMCMP,ALL
k,9,235,500,5000
k,10,765,500,5000
k,11,765,1500,5000
k,12,235,1500,5000
a,5,6,7,8
a,9,10,11,12
asba,5,6
AGEN,3,7,,,,,-2500, ,0
mat,1
r,1
type,1
ASEL,s,,,1,3,2,
AESIZE,all,100,
mat,2
r,2
type,1
ASEL,s,,,2,4,2,
AESIZE,all,100,
mat,3
r,3
type,1
ASEL,s,,,5,7,,
AESIZE,all,50,
allsel,all
MSHAPE,0,2D
MSHKEY,0
amesh,all
/solu
asel,s,loc,z,0
DA,all,all,,
asel,s,loc,z,5000
DA,all,all,,
allsel,all
nsel,s,,,6600,6604,4
f,all,fy,1020000
allsel,all
solve