磁场和电磁力计算

dys1111

大家好:
        建立了一个简单的三维模型，通高频电的线圈产生磁场，现在的问题是频率变化时磁场不变，电磁力为0，感觉线圈中电流加载有问题，或是边界条件设置有误，请各位大牛看一下，不胜感激。以下是源程序：

/prep7  
/rgb,index,100,100,100,0
/rgb,index,80,80,80,13
/rgb,index,60,60,60,14
/rgb,index,0,0,0,15
CYLIND,0,0.12,0,0.293,0,30
CYLIND,0,0.065,0.04,0.253, 0,30
CYLIND,0.075,0.092,0.04,0.055, 0,30
CYLIND,0.075,0.092,0.058,0.073, 0,30
CYLIND,0.075,0.092,0.076,0.091, 0,30
CYLIND,0.075,0.092,0.094,0.109, 0,30
CYLIND,0.075,0.092,0.112,0.127, 0,30
CYLIND,0.075,0.092,0.13,0.145,0,30  
CYLIND,0.075,0.092,0.148,0.163,0,30
CYLIND,0.075,0.092,0.166,0.181,0,30
CYLIND,0.075,0.092,0.184,0.199, 0,30
CYLIND,0.075,0.092,0.202,0.217, 0,30
CYLIND,0.075,0.092,0.22,0.235, 0,30
CYLIND,0.075,0.092,0.238,0.253,  0,30
VOVLAP,all
NUMCMP,ALL                !压缩模型数目
VSEL,ALL

ET,1,SOLID117                      !ALUMINUM PLATE
ET,2,SOLID117,                        !COIL
ET,3,SOLID117                         !AIR   
emunit,mks           ! set magnetic units

MP,MURX,1,8  
MP,RSVX,1,2.1e-7   !metal
MP,MURX,2,1
MP,RSVX,2,1.75e-8  !coin
MP,MURX,3,1!air


vsel,s,volu,,1
vatt,1,1,1
esize,.005
vsweep,all


vsel,s,volu,,2,13  !choose coin
vatt,2,1,2,
esize,.008
esize,.008
vsweep,all
NSLA,S,1
CP,j,curr,ALL

vsel,s,volu,,14
vatt,3,1,3
esize,.008
mshkey,0
mshape,1,3d
vmesh,all

lsel,s,line,,162,163
lsel,a,line,,17
nsll,s,1
d,all,Az,0 !加磁力线平行边界条件

/SOLU
CSYS,1

ESEL,S,MAT, ,2
BFE,ALL,JS,, ,-0.84E8,
ESEL,ALL

ANTYP,HARM !谐性分析
HARFR,2000 !分析频率
allsel,all

solve

fancyfreer

需要有电磁力部分的117单元属性，是不是没选AZ VOLT啊，没有感应电流就没有电磁力吧？

dys1111

问题解决了，这个简单例子有两个错误，一是线圈中电流流向，二是导体的117设置。

liuxianlong

楼主你好，现在正在做电磁结构方面的研究，想跟楼主请教下，楼主能不能提供下正确的命令流呢，感激不尽！