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用Cmatrix算平板电容器电容,SYMFAC取1,得到的电容为理论值的1/4左右,不知是模型的问题,还是SYMFAC的取值问题。
命令流:
finish
/clear
/filname,trans_2D_C,1
/prep7
et,1,121
mp,perx,1,2.25 !介电常数
!KEYOPT,1,3,1
RECTNG,10/1000,11/1000,10/1000,150/1000
RECTNG,39/1000,40/1000,10/1000,150/1000
RECTNG,0,80/1000,0,180/1000
AOVLAP,all
NUMCMP,AREA
allsel
ASEL,s,area, ,3
AATT,1, ,1,0,
SMRT,4
MSHAPE,1,2D
MSHKEY,0
AMESH,3
lsel,s,line,,5,6
nsll,s,1
cm,cond1,node
lsel,s,line,,1,4
nsll,s,1
cm,cond2,node
allsel
finish
/sol
cmatrix,1,'cond',2,0
SOLVE
FINISH
计算结果:
*** Lumped Capacitance Matrix ***
Self Capacitance of conductor 1. = 0.27281E-10
理论计算值9.956*e-11,差了4倍,然而对称系数取4的话,虽然结果很吻合,却是没有道理,请教版主!file:///C:/DOCUME%7E1/zhang/LOCALS%7E1/Temp/moz-screenshot.jpg |
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