我做的一个小模型，为什么空气层不能mesh？？

张路遥

我做了一个模型，可是空气层不能划分网格，请高手指点，代码如下：
/PREP7
emunit,mks     !定义电磁单位为国际标准单位，即μ0=4 Pi e-7 henries/meter

! 定义单元类型
ET,1,96
ET,2,96

! 定义材料
MP,MURX,1,1         !定义空气（磁导率=1）
HC=895000           !表示矫顽力895000
TB,BH,2,,30
TBPT,, 130.000000 , 0.100000000
TBPT,, 170.000000 , 0.200000000
TBPT,, 197.000000 , 0.300000000
TBPT,, 218.000000 , 0.400000000
TBPT,, 250.000000 , 0.500000000
TBPT,, 290.000000 , 0.600000000
TBPT,, 338.000000 , 0.700000000
TBPT,, 400.000000 , 0.800000000
TBPT,, 472.000000 , 0.900000000
TBPT,, 570.000000 , 1.00000000
TBPT,, 682.000000 , 1.10000000
TBPT,, 810.000000 , 1.20000000
TBPT,, 975.000000 , 1.30000000
TBPT,, 1600.00000 , 1.40000000
TBPT,, 2520.00000 , 1.50000000
TBPT,, 3520.00000 , 1.60000000
TBPT,, 4760.00000 , 1.70000000
TBPT,, 8300.00000 , 1.80000000
TBPT,, 12000.0000 , 1.90000000
TBPT,, 17000.0000 , 2.00000000
TBPT,, 23000.0000 , 2.10000000
TBPT,, 32000.0000 , 2.20000000
TBPT,, 42500.0000 , 2.30000000
TBPT,, 44500.0000 , 2.32000000
TBPT,, 48200.0000 , 2.35000000
TBPT,, 52200.0000 , 2.37000000
TBPLOT,BH,2,,,
/IMAGE,SAVE,BH2,JPEG       !将材料2的B-H曲线存储成bh2.jpg
mp,mgxx,2,hc
mp,mgyy,2,0
mp,mgzz,2,0          !定义永磁铁矫顽力

!建立模型
!建立永磁体
block,0,0.03,0,0.05,0,0.04  
block,0.080,0.111,0,0.05,0,0.04
!建立线圈
K, ,0.0400,0,0,0
k, ,0.0400,0,0.04,
k, ,0.0412,0,0.0,
k, ,0.0412,0,0.0388,
k, ,0.0436,0,0.0,
k, ,0.0436,0,0.0388,
k, ,0.0448,0,0.0012,
k, ,0.0448,0,0.04,
k, ,0.0472,0,0.0012,
k, ,0.0472,0,0.04,
k, ,0.0484,0,0.0,
k, ,0.0484,0,0.0388,
k, ,0.0508,0,0.0,
k, ,0.0508,0,0.0388,
k, ,0.0520,0,0.0012,
k, ,0.0520,0,0.04,
k, ,0.0544,0,0.0012,
k, ,0.0544,0,0.04,
k, ,0.0556,0,0.0,
k, ,0.0556,0,0.0388,
k, ,0.0580,0,0.0,
k, ,0.0580,0,0.0388,
k, ,0.0592,0,0.0012,
k, ,0.0592,0,0.04,
k, ,0.0616,0,0.0012,
k, ,0.0616,0,0.04,
k, ,0.0628,0,0.0,
k, ,0.0628,0,0.0388,
k, ,0.0652,0,0.0,
k, ,0.0652,0,0.0388,
k, ,0.0664,0,0.0012,
k, ,0.0664,0,0.04,
k, ,0.0688,0,0.0012,
k, ,0.0688,0,0.04,
k, ,0.0700,0,0.0,
k, ,0.0700,0,0.04,
l,17,18
l,19,20
l,21,22
l,23,24
l,25,26
l,27,28
l,29,30
lstr,31,32
lstr,33,34
lstr,35,36
lstr,37,38
lstr,39,40
lstr,41,42
lstr,43,44
lstr,45,46
lstr,47,48
lstr,49,50
lstr,51,52
lstr,17,19
lstr,21,27
lstr,23,25
lstr,29,35
lstr,31,33
lstr,37,43
lstr,39,41
lstr,45,51
lstr,47,49
lstr,18,24
lstr,20,22
lstr,26,32
lstr,28,30
lstr,34,40
lstr,36,38
lstr,42,48
lstr,44,46
lstr,50,52
FLST,2,36,4   
FITEM,2,25  
FITEM,2,26  
FITEM,2,43  
FITEM,2,52  
FITEM,2,53  
FITEM,2,27  
FITEM,2,28  
FITEM,2,44  
FITEM,2,45  
FITEM,2,29  
FITEM,2,30  
FITEM,2,55  
FITEM,2,54  
FITEM,2,31  
FITEM,2,32  
FITEM,2,46  
FITEM,2,47  
FITEM,2,33  
FITEM,2,34  
FITEM,2,56  
FITEM,2,57  
FITEM,2,35  
FITEM,2,36  
FITEM,2,48  
FITEM,2,49  
FITEM,2,37  
FITEM,2,38  
FITEM,2,58  
FITEM,2,59  
FITEM,2,39  
FITEM,2,40  
FITEM,2,50  
FITEM,2,51  
FITEM,2,41  
FITEM,2,42  
FITEM,2,60  
AL,P51X
APLOT   
FLST,2,1,5,ORDE,1   
FITEM,2,13  
VEXT,P51X, , ,0,0.0005,0,,,,
!建立钢板模型
block,-0.25,0.25,-0.011,-0.001,-0.25,0.25
!建立空气层
block,-0.3,0.3,-0.02,0.06,-0.3,0.3

vovlap,all
numcmp,volu          !将生成的体重新编号

vsel,s,volu,,1
vatt,2

vsel,s,volu,,2
vatt,2

vsel,s,volu,,4
vatt,1
vsel,s,volu,,5    !air
vatt,1
!建立单元类型，并划分网格
vsel,all
smrtsize,6
mshape,1,3d
mshkey,0
vmesh,all


!求解
finish
/sol
solve
finish

还有中间的线圈我想加交流电，有什么单元，怎么赋值

yqbird

钢板和线圈的材料属性都没有定义，然后给体赋属性时也没有定义单元类型，解决了这两个问题后，就可以剖分了。
只要创建一个宏设置载荷步，通过变量和函数就可以定义交流电了。

张路遥

谢谢这位兄台，但是能不能麻烦你说的具体些，我是新手搞不太清楚。

张路遥

我的这个错误提示是什么意思，好像和材料没什么关系吧

yqbird

很多东西都说不清楚，我建议你多看看Help里面的东西。
这个错误提示的意思就是说你剖分的结果中有些面的形状很不理想，要你选用三角剖分或者修改你的剖分精度然后重新进行剖分。

liuxiaotian

如此冗长的命令 那个神仙会每个字每个字的看一遍 还发现问题？？
大部分网格划分问题 是模型本身有问题
一个图 看个大概就能把一般的问题发现何必还一行行看命令呢

与人方便 才是与己方便

看模型 最下面 两个立柱中间 有非常细腻的弯曲部分
这里旁边就是大平面 忽然变成细小的弯折  如果用一个Body去建模 除非使用超细腻的网格 几十万块钱的电脑 普通的 硬拼网格尺寸 根本没法弄
切开
吧复杂的部分切开 切成一大堆 每个局部都非常简单的 在合并节点 每个局部都能方便的画网格 整体的网格才好