new
;第一步:静力计算阶段
config dyn
set dyn off
gen zone brick size 6 3 2
gen zone brick size 2 3 2 p0 0 0 2
gen zone brick size 2 3 2 p0 4 0 2
gen zone wedge size 1 3 2 p0 2 0 2
gen zone wedge size 1 3 2 p0 4 3 2 p1 3 3 2 p2 4 0 2 p3 4 3 4 &
p4 3 0 2 p5 4 0 4
model elastic
prop bulk 66667 shear 40000
ini dens 0.0025
set grav 0 0 -10
fix x range x -0.01 0.01
fix x range x 5.99 6.01
fix y range y -0.01 0.01
fix y range y 2.99 3.01
fix z range z -0.1 0.1
hist unbal
solve
save 11-3_1.sav
;第二步:动力计算阶段
set dyn on
def iniwave
per = 0.01
end
iniwave
def wave
wave = 0.5 * (1.0 - cos (2*pi*dytime/per))
end
free x y z ran z -0.1 0.1 ;去掉模型底部原有的静力条件
apply nquiet squiet dquiet ran z -0.1 0.1 ;静态边界条件
apply dstress 1.0 hist wave ran z -0.1 0.1 ;加动力荷载
apply ff ;施加自由场边界条件
group ff_corner
group ff_side ran x 0 6
group ff_side ran y 0 3
group main_grid ran x 0 6 y 0 3
set dyn time = 0 ;设置动力计算从0s开始
hist reset ;清空已有的历史信息
hist unbal
hist dytime
; 主体网格
hist gp xvel 2 1 0
hist gp xvel 2 1 5.0
; 柱体网格
hist gp xvel -1 -1 0
hist gp xvel -1 -1 5.0
; 平行于y方向的二维自由场网格
hist gp xvel -1 0 0
hist gp xvel -1 0 5.0
; 平行于x方向的二维自由场网格
hist gp xvel 2 -1 0
hist gp xvel 2 -1 5.0
solve age 0.015
save 11-3_2.sav
这是陈育民老师书上的一个例题,我有几个问题想问问各位。
1.静力状态下在z=0处只固定z方向,为什么后面动力计算free x y z ran z -0.1 0.1呢?
2.最后面主体网格是怎么形成的?
hist gp xvel 2 1 5.0是什么意思 啊?