aovlap,all后材料属性发生了变化，为什么
下面的程序是我建立一个电机的一部分，但就是这一步出了问题，导致这以后的都不对。我先建立了三个面area，1、2、3然后用一个空气圆覆盖。我前面已经定义了1，2，3的三个面的材料属性，但是当我用第四个面覆盖后，再aovlap,all结果第三面的属性改掉了，变成空气了，而1，2的属性没有变。这是为什么呢？
大家看一下，谢谢各位了！
/units,si
!!!!!!!!!!!!!!!define the parameters needed
c_pi=3.1415926 ! define pi value
c_phase=3 ! define the phase number
pm_br=1.2 ! br(t)
pm_ur=1.05 ! ur
pm_u0=4e-7*c_pi ! u0
pm_hc=pm_br/pm_u0/pm_ur ! hc=br/u0/ur(a/m)
/prep7
!!!!!!!!!!!!!!!!!!!!Assign element type and material propertis
et,1,plane53
mp,murx,1,1 ! set realtive permeability for air to 1
mp,murx,2,1 ! set realtive permeability for coil to 2
tb,bh,3,1,38 ! set b-h curve for material 3:stator and
rotor iron_emd
tbpt,,40,0.432 ! hc: a/m; br:t
tbpt,,60,0.613
tbpt,,77.8,0.728
tbpt,,100,0.83
tbpt,,127,0.922
tbpt,,154,0.995
tbpt,,200,1.1
tbpt,,244,1.16
tbpt,,300,1.23
tbpt,,347,1.27
tbpt,,400,1.31
tbpt,,449,1.33
tbpt,,509,1.36
tbpt,,600,1.39
tbpt,,724,1.41
tbpt,,884,1.44
tbpt,,1040,1.45
tbpt,,1290,1.48
tbpt,,1570,1.5
tbpt,,1990,1.53
tbpt,,2430,1.56
tbpt,,2910,1.58
tbpt,,3490,1.61
tbpt,,4000,1.63
tbpt,,4880,1.66
tbpt,,6010,1.69
tbpt,,6960,1.72
tbpt,,8000,1.74
tbpt,,10000,1.78
tbpt,,12100,1.81
tbpt,,14300,1.84
tbpt,,17100,1.88
tbpt,,20000,1.91
tbpt,,24700,1.96
tbpt,,31000,2.0
tbpt,,36700,2.04
tbpt,,40000,2.05
tbpt,,133000,2.50
mp,mgxx,4,pm_hc !set hc for material 4:pms
mp,murx,4,pm_ur !set ur for material 4:pms
!!!!!!!!!!!!!!!!!model the stator
p=36
pitch=360/p
rso=0.15
rsi=0.113
g=0.001
roo=0.112
roi=0.101
rio=0.100
rii=0.030
l1=0.02 !定子平行齿的长度
l2=0.025 !转子平行齿的长度
!/pnum,line,1
!!!!!!!!!!!!!!!!!!建立一个齿的模型先定子
k,1
csys,1
k,3,rso,pitch/2
k,4,rso,-pitch/2
larc,3,4,1,rso !line1
k,5,rsi+0.0025+l1,pitch/2
k,6,rsi+0.0025+l1,-pitch/2
csys,0
k,7,sqrt((rsi+0.0025+l1)**2+0.004**2),0.004
k,8,sqrt((rsi+0.0025+l1)**2+0.004**2),-0.004
k,9,sqrt((rsi+0.0025)**2+0.004**2),0.004
k,10,sqrt((rsi+0.0025)**2+0.004**2),-0.004
lstr,3,5 !line2
larc,5,7,1,rsi+0.0025+l1 !line3
lstr,7,9 !line4
lstr,8,10 !line6
larc,6,8,1,rsi+0.0025+l1 !line7
csys,1
k,11,rsi+0.001,pitch/2-0.75
k,12,rsi+0.001,-pitch/2+0.75
k,13,rsi,pitch/2-0.75
k,14,rsi,-pitch/2+0.75
k,15,rsi,pitch/2
k,16,rsi,-pitch/2
lstr,9,11 !line8
lstr,10,12 !line9
lstr,11,13 !line10
lstr,12,14 !line11
larc,13,15,1,rsi !line12
larc,14,16,1,rsi !line13
larc,13,14,1,rsi !line14
lstr,5,15 !line15
lstr,6,16 !line16
lstr,4,6 !line17
lsel,s,,,3,4,1
lsel,a,,,7,11,2
lsel,a,,,14
al,all
asel,s,,,1 !area1
aatt,2,2,1,0
allsel,all
lsel,s,,,5,6,1
lsel,a,,,8,12,2
lsel,a,,,15
al,all
asel,s,,,2 !area2
aatt,2,2,1,0
allsel,all
lsel,s,,,1,10,1
lsel,a,,,13,16,3
al,all
asel,s,,,3 !area3
aatt,3,3,1,0
allsel,all
/pnum,mat,1
cyl4,0,0,rii,0,rso,360 !area4
aovlap,all aovlap命令必须在aatt之前 可是如果模型比较复杂的话，如果最后再aatt的话，元素是很难选择的啊！我试过的，用命令流文件根本无法实现啊！我和我师兄作的步骤是一样的，不知道为什么他的对，我的就不对！
非常感谢啊！ 就像我上面的程序，如果面比较多，aovlap后想要选择具体的面很难啊 你的命令很少了，慢慢来， 在完全建好模型之后就用
aovlap，all
然后用一个
numcmp，all
然后再显示面
这样就清楚多了 定义材料必须在模型处理前，然后定义材料，再划分网格，这是正确的步骤，如果前面定义的材料不对可以想办法重新更改材料，或者重新划分网格。
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