new
gen zone brick size 1 1 2
model mohr
prop bulk 3e7 shear 1e7 coh 10e3 fri 15 ten 0
fix z ran z 0
fix x ran x 0
fix x ran x 1
fix y ran y 0
fix y ran y 1
ini dens 2000
ini szz -40e3 grad 0 0 20e3 ran z 0 2
ini syy -20e3 grad 0 0 10e3 ran z 0 2
ini sxx -20e3 grad 0 0 10e3 ran z 0 2
set grav 0 0 -10
solve
plo con sz
上面的例子中fix z ran z 0和fix z ran z -0.1 0.1有什么区别吗?
还有ini szz -40e3 grad 0 0 20e3 ran z 0 2中grad后的数代表什么意思?