网格节点速度方面的问题

gaohaozheng

new
gen zone brick size 3 3 3
model elas
prop bulk 3e8 shear 1e8
ini dens 2000
fix z ran z -0.1 0.1
fix x ran x -0.1 0.1
fix x ran x 2.9 3.1
fix y ran y -0.1 0.1
fix y ran y 2.9 3.1
set grav 0 0 -10
solve
app nstress -10e4 ran z 3 x 1 2 y 1 2
hist gp vel 1 1 2
plot vel
solve
求大神帮我看一下这个程序哪个地方出现问题了啊