沥青混凝土路面建模 分层模型怎样网格划分

这是我做的模型， 求高手帮我对每层划分一下网格
/prep7
et,1,solid45 !指定单元类型
mp,ex,1,1.2e9 !定义第一层性能参数
mp,prxy,1,0.35
mp,dens,1,2500
mp,ex,2,0.8e9 !定义第二层性能参数
mp,prxy,2,0.25
mp,dens,2,2400
mp,ex,3,0.8e9 !定义第三层性能参数
mp,prxy,3,0.25
mp,dens,3,2400
mp,ex,4,0.6e9 !定义第四层性能参数
mp,prxy,4,0.25
mp,dens,4,2200
mp,ex,5,0.5e8 !定义第五层性能参数
mp,prxy,5,0.35
mp,dens,5,1900
k,1,0,0,0
k,2,0,10.5,0
k,3,7.5,10.5,0
k,4,7.5,0,0
k,5,0,0,0.15
k,6,0,10.5,0.15
k,7,7.5,10.5,0.15
k,8,7.5,0,0.15
k,9,0,0,0.31
k,10,0,10.5,0.31
k,11,7.5,10.5,0.31
k,12,7.5,0,0.31
k,13,0,0,0.47
k,14,0,10.5,0.47
k,15,7.5,10.5,0.47
k,16,7.5,0,0.47
k,17,0,0,0.65
k,18,0,10.5,0.65
k,19,7.5,10.5,0.65
k,20,7.5,0,0.65
k,21,0,0,1.15
k,22,0,10.5,1.15
k,23,7.5,10.5,1.15
k,24,7.5,0,1.15
v,1,2,3,4,5,6,7,8
v,5,6,7,8,9,10,11,12
v,9,10,11,12,13,14,15,16
v,13,14,15,16,17,18,19,20
v,17,18,19,20,21,22,23,24