这个程序的网格划分不对么？应该怎么划分呢？
newgen zone brick p0 0 0 0 p1 2 0 0 p2 0 0.5 0 p3 0 0 3 size 3 1 3
gen zone brick p0 2 0 0 p1 20 0 0 p2 2 0.5 0 p3 2 0 3 size 17 1 3 ratio 1.03 1 1
gen zone brick p0 2 0 3 p1 20 0 3 p2 2 0.5 3 p3 12 0 13 p4 20 0.5 3 p5 12 0.5 13 p6 20 0 13 p7 20 0.5 13 size 17 1 17 ratio 1.03 1 1
fix x y z range z -0.1 0.1
fix x range x 19.9 20.1
fix x range x -0.1 0.1
fix y
model elas
prop density 2000 bulk 3e9 shear 1e9
set gravity 0 0 -10.0
solve
ini xdisp 0 ydisp 0 zdisp 0
ini xvel 0 yvel 0 zvel 0
model mohr
prop density 2000 bulk 1.0e8 shear 3.0e7 coh 12380.0 tens 1.0e6 fric 20 dila 20
solve fos file slope3dfos1.save associated
plot set background white
plot fos cont ssi outline on vel red
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