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
________
fix z ran z -0.1 0.1
fix x ran x -0.1 0.1
fix x ran x 0.9 1.1
fix y ran y -0.1 0.1
fix y ran y 0.9 1.1
_____________
用elas model 求初始地应力,设置上面那种边界算的不对,下面的对,为什么啊,两者分别是什么意思,有什么区别呢?