求助：交流电条件下电阻计算
本帖最后由 colinzhoucn 于 2012-10-24 20:46 编辑计算土体交流电条件下的电阻，选择solid231单元，取两个电极电供电1A，50Hz，另选两点测量交流电压，出错。LIST节点电位分布时出现以下警告：
The degree of freedom solution is not available.The PRNSOL commandis ignored.
这是为什么？
命令如下：
finish
/clear
!/UIS,MSGPOP,3
!/NERR,5,1000000,
*dim,v1,array,4,,
*dim,v2,array,4,,
*set,C_Py,0.12
*set,C_W,0.002
*set,E_h,0.10
*set,p,-20
*set,rho,14.8
*set,L_B,0.24
*set,W_B,0.15
*set,H_B,0.13 !参数和数组设定
/filename,Ren's Expriment_3D modeling
keyw,magelc,1
finish
!**************************************************************
*set,C_h,0.01
!**************************************************************
*set,K,0
/prep7
block,0,W_B,0,L_B,0.00,0.05!
block,0,W_B,0,L_B,0.05,0.13!
block,-0.01,W_B+0.01,C_Py-C_W/2,C_Py+C_W/2,H_B-C_h,H_B+0.01
FLST,2,2,6,ORDE,2
FITEM,2,1
FITEM,2,-2
VGLUE,P51X !GLUE布尔操作
FLST,2,2,6,ORDE,2
FITEM,2,1
FITEM,2,4
VSBV,P51X, 3 !DEVIDE布尔操作
HPTCREATE,AREA,2,0,COORD,0.075,0.015,0.05,
HPTCREATE,AREA,2,0,COORD,0.075,0.045,0.05,
HPTCREATE,AREA,2,0,COORD,0.075,0.075,0.05,
HPTCREATE,AREA,2,0,COORD,0.075,0.105,0.05,
HPTCREATE,AREA,2,0,COORD,0.075,0.135,0.05,
HPTCREATE,AREA,2,0,COORD,0.075,0.165,0.05,
HPTCREATE,AREA,2,0,COORD,0.075,0.195,0.05,
HPTCREATE,AREA,2,0,COORD,0.075,0.225,0.05,
!***************************************************************
/prep7
csys,0
et,1,231,,, !设置材料属性
!定义材料属性
mp,murx,1,1 !定义磁导率
mp,perx,1,25 !定义介电常数
mp,rsvx,1,rho !定义电阻率
!网格剖分
msha,1,3d
mshk,0
vmesh,all
n1=node(0.075,0.015,0.05)
n2=node(0.075,0.045,0.05)
n3=node(0.075,0.075,0.05)
n4=node(0.075,0.105,0.05)
n5=node(0.075,0.135,0.05)
n6=node(0.075,0.165,0.05)
n7=node(0.075,0.195,0.05)
n8=node(0.075,0.225,0.05)
/solu
antype,harmic
harfrq,50
f,n5,amps,1
f,n8,amps,-1
sbctran
solve
finish
/post1
va=volt(n6)-volt(n7)
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