如附件中图片所示，请问如何对该实体划分网格啊？所建实体命令流如下：
a=5
b=5
c=10
m=1
deep=1.5
r=0.5
t=0.015
weiyi=0.5
pi=3.14
angle=30
y=b/2-deep
duanju=1
!单元定义
/prep7
*AFUN,DEG
ET,1,SOLID45
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,2,,8e6
MPDATA,PRXY,2,,0.37
TB,DP,2,,,
TBMODIF,1,1,5e6
TBMODIF,1,2,20
TBMODIF,1,3,
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,DENS,2,,1900
!创建点
k,1,-a/2,-b/2,0
k,2,a/2,-b/2,0
k,3,a/2,b/2,0
k,4,-a/2,b/2,0
k,5,-a/2,-b/2,c/2-m/2+b/2/TAN(angle)
k,6,a/2,-b/2,c/2-m/2+b/2/TAN(angle)
k,7,a/2,b/2,c/2-m/2-b/2/TAN(angle)
k,8,-a/2,b/2,c/2-m/2-b/2/TAN(angle)
k,9,-a/2,-b/2,c/2+m/2+b/2/TAN(angle)
k,10,a/2,-b/2,c/2+m/2+b/2/TAN(angle)
k,11,a/2,b/2,c/2+m/2-b/2/TAN(angle)
k,12,-a/2,b/2,c/2+m/2-b/2/TAN(angle)
k,13,a/2,-b/2,c
k,14,-a/2,-b/2,c
k,15,-a/2,b/2,c
k,16,a/2,b/2,c
!创建面
a,1,2,3,4
a,4,1,5,8
a,2,3,7,6
a,3,4,8,7
a,5,6,2,1
a,5,6,7,8
a,12,11,10,9
a,11,16,13,10
a,11,12,15,16
a,14,15,12,9
a,13,14,15,16
a,9,10,13,14
!创建体
va,1,2,3,4,5,6
va,7,8,9,10,11,12
!挖空
cyl4,0,y,r,,,,c
FLST,2,2,6,ORDE,2
FITEM,2,1
FITEM,2,-2
VSBV,P51X, 3
