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各位好,我仿照VM190做了一个仿真,仿真的模型为一个缠绕有线圈的U形铁芯,下方为一个铁试块,周围全是空气。我想观察铁芯末端和试块之间的B,但是计算时会有No constraints have been defined using the D command和Coefficient ratio exceeds 1.0e8 - Check results.这样的警告。是不是与边界条件有关??
还要用D来增加什么边界条件呢?这是我第一次做3d的磁场仿真,错误之处,还请各位帮忙指出,谢谢,谢谢了!
/PREP7
SMRT,OFF
ET,1,SOLID98,10 ! 10-NODE TETRAHEDRAL, MAG OPTION
ET,3,SOURC36 ! CURRENT SOURCE ELEMENT
EMUNIT,MKS ! MKS UNITS
!定义各个参数
I=1 ! CURRENT(AMPS)
N=100 ! TURNS
COIL_L=0.02 ! COIL LENGTH
COIL_R=0.008 ! COIL RADIUS
COIL_T=0.0005 ! COIL THICKNESS
IRON_L=0.06 ! IRON LENGTH
IRON_W=0.01 ! IRON WIDTH
IRON_H=0.03 ! IRON HEIGHT
SPE_L=0.08 ! SPECIMEN LENGTH
SPE_W=0.03 ! SPECIMEN WIDTH
SPE_H=0.03 ! SPECIMEN HEIGHT
LIFTOFF=0.005 ! LIFTOFF BETWEEN IRON AND SPECIMEN
GAP=0.01
R,2,1,N*I,COIL_T,COIL_L ! COIL CONSTANT SET 1:COIL TYPE, CURRENT, THICKNESS, LENGTH
!材料属性
MP,MURX,1,1 ! RELATIVE PERMEABILITY OF AIR
MP,MURX,2,4000 ! RELATIVE PERMEABILITY OF IRON
mp,murx,3,4000 ! relative permeability of specimen
!生成sourc36线圈
N,1,COIL_R,LIFTOFF+IRON_H-IRON_W/2,0 ! CREATE NODES TO LOCATE COIL
N,2,0,LIFTOFF+IRON_H-IRON_W/2+COIL_R,0
N,3,0,LIFTOFF+IRON_H-IRON_W/2,0
TYPE,3 ! SOURCE ELEMENT TYPE
REAL,2
E,1,2,3 ! DEFINE COIL ELEMENT
!创建铁芯
BLOCK,-IRON_W/2,IRON_W/2,LIFTOFF,LIFTOFF+IRON_H,IRON_L/2,IRON_L/2-IRON_W
BLOCK,-IRON_W/2,IRON_W/2,LIFTOFF+IRON_H-IRON_W,LIFTOFF+IRON_H,IRON_L/2-IRON_W,-(IRON_L/2-IRON_W)
BLOCK,-IRON_W/2,IRON_W/2,LIFTOFF,LIFTOFF+IRON_H,-(IRON_L/2-IRON_W),-IRON_L/2
!创建铁试块
BLOCK,-SPE_W/2,SPE_W/2,-SPE_H,0,SPE_L/2,-SPE_L/2
!空气
BLOCK,-SPE_W/2-GAP,SPE_W/2+GAP,-SPE_H-GAP,LIFTOFF+IRON_H+GAP,-SPE_L/2-GAP,SPE_L/2+GAP
VOVLAP,ALL ! OVERLAP AIR, IRON AND SPECIMEN
numcmp,volu
vsel,s,volu,,2,4,1 !iron
vatt,2,1,1
vsel,s,volu,,1 !specimen
vatt,3,1,1
vsel,s,volu,,5 !air
vatt,1,1,1
vsel,all
vsel,s,mat,,2 !MESH IRON
esize,0.003
mshk,0
msha,1,3d
VMESH,all
vsel,s,mat,,3 !MESH SPECIMEN
esize,0.003
mshk,0
msha,1,3d
VMESH,all
vsel,s,mat,,1
esize,0.003
mshk,0
msha,1,3d
VMESH,all !MESH AIR
nsel,all
FINISH
/SOLU
ANTYPE,STATIC
MAGSOLV,3
FINISH
[ 本帖最后由 perch88 于 2009-1-6 15:25 编辑 ] |
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