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我做一条传输线,外半径是0.3cm,长度为2m,内径由0.2778m到0.046m,在内外半径之间填充介质,相对磁导率为1,相对介电常数为80,电阻率为3e4,我只对介质区域建模,在外半径的整个面上上施加了磁通量平行边界条件。在z=0的面上,内外半径上施加一个矩形200ns的矩形脉冲。x=0.3上,点位为0,脉冲加到x=0.2778上。
这是我写的apdl命令,不是道对不对?
/filname,transmissionline,1
/title,tapered line
/prep7
et,1,solid97 自由度为ax,ay,az,volt
mp,murx,1,1
mp,perx,1,80
mp,rsvx,1,3e4
k,1,0.2778
k,2,0.3
k,3,0.046,,2
k,4,0.3,,2
k,5,,,0.5
k,6,,,1
a,1,2,4,3
vrotat,1,,,,,,5,6,360,2
vglue,all
vadd,all
vatt,1,,1,0
esize,3
vmesh,all
csys,1
nsel,s,loc,x,0.3
d,all,az,0
nsel,all
asel,s,loc,z,0
nsel,s,loc,x,0.2778
cm,nv,node
asel,all
nsel,all
asel,s,loc,z,0
nsel,s,loc,x,0.3
d,all,volt,0
asel,all
nsel,all
!脉冲加载
/solu
antype,transient
tintp,,0.25,0.5,0.5
timint,off,all
time,1e-7
deltim,1e-7,,,1
autots,-1
kbc,1
d,nv,volt,0
solve
timint,on,all
time,3E-07
deltim,3E-07,,,1
autots,-1
kbc,1
d,nv,volt,50000
solve
time,4.00000E-07
d,nv,volt,0
solve
求解后,会有这个错误:
there are electrical current conduction elements and electrostatic elements in the nodel.
they both use VOLT degrees of freedom but the respective formulations are NOT compatible.
This analysis is not valid. |