[求助]在做压电陶瓷的瞬态分析时出现了如下提示！！

jiangxuchu · 发表于 2006-3-23 11:20

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各位大虾，我做压电陶瓷的瞬态分析，在向
nsel,s,loc,x,10
cp,11,volt,all
*get,front,node,,num,min
ALLSEL

finish
antype,trans,new
trnopt,full
eqslv,sparse
betad,0.1/7650
d,front,volt,800
这时出现一个警告对话框：
Both solid model and finite element model boundary conditions have been
applied to this model. As solid loads are transferred to the nodes or
elements, they can overwrite directly applied loads.
求解完之后，压电陶瓷片一端的位移是0，不知到底哪一步出现了问题，请指教！谢谢！！

[ 本帖最后由 rodge 于 2008-3-14 03:36 编辑 ]

linlin820 · 发表于 2006-3-23 16:05

载荷有冲突，你给的代码不全，不知道具体原因，我转几个例子你比较找找毛病吧

（1）对压电陶瓷加z向电压，产生膨胀、收缩

/PREP7
/GRAPHICS,FULL
!############################## parameter #######################
*AFUN,DEG
VOL=0
VOH=20
!########################### Material property #################
!****************** 3---PZT **************************
et,3,solid5 ! UX,UY,UZ,TEMP,VOLT,MAG
!mp,nuxy,3,0.27
mp,dens,3,7.64e3 ! kg/m3
mp,perx,3,8.93e-9 ! F/m
mp,pery,3,8.93e-9 ! F/m
mp,perz,3,6.92e-9 ! F/m
mp,kxx,3,1
mp,murx,3,1
tb,anel,3 ! Anisotropic elastic matrix 72A??? 99.3.4
tbdata,1,11.565e10,6.489e10,6.229e10,0,0,0
tbdata,7,11.565e10,6.229e10,0,0,0
tbdata,12,9.298e10,0,0,0
tbdata,16,1.786e10,0,0
tbdata,19,1.786e10,0
tbdata,21,1.786e10tb,piez,3 ! Piezoelectric matrix 72A??? 99.3.4
tbdata,1,0,0,-12.3082
tbdata,4,0,0,-12.3082
tbdata,7,0,0,20.7574
tbdata,10,0,0,0
tbdata,13,0,17.0357,0
tbdata,16,17.0357,0,0!------------------------ model---------------------------
NUMSTR,KP,1
NUMSTR,LINE,1
NUMSTR,AREA,1block,0,10,0,5,0,1type,3
mat,3
esize,0.5
vmesh,all
!------------boundary condition-----------------------
nsel,s,loc,x,0
d,all,ux
d,all,uy
d,all,uz
! -------------COUPLE THE TWO FACE OF ELECTRODE -------------
nsel,s,loc,z,1
cp,11,volt,all
*get,ntop,node,,num,minnsel,s,loc,z,0
cp,21,volt,all
*get,nbot,node,,num,minALLSfinish
/eof
!-------------------------------------------
/soluantype,staticALLS
d,nTOP,volt,voh
d,nBOT,volt,volESEL,S,TYPE,,3
NSLE
D,ALL,TEMP
!D,ALL,MAG
ALLSnsel,all
esel,allsavesolvefini/eof

复制代码

linlin820 · 发表于 2006-3-23 16:06

（2）对压电陶瓷加x向电压，产生摆动

/PREP7
/GRAPHICS,FULL!############################## parameter #######################
*AFUN,DEGVOL=0
VOH=20!########################### Material property #################!****************** 3---PZT **************************
et,3,solid5 ! UX,UY,UZ,TEMP,VOLT,MAG
!mp,nuxy,3,0.27
mp,dens,3,7.64e3 ! kg/m3
mp,perx,3,8.93e-9 ! F/m
mp,pery,3,8.93e-9 ! F/m
mp,perz,3,6.92e-9 ! F/m
mp,kxx,3,1
mp,murx,3,1tb,anel,3 ! Anisotropic elastic matrix 72A??? 99.3.4
tbdata,1,11.565e10,6.489e10,6.229e10,0,0,0
tbdata,7,11.565e10,6.229e10,0,0,0
tbdata,12,9.298e10,0,0,0
tbdata,16,1.786e10,0,0
tbdata,19,1.786e10,0
tbdata,21,1.786e10tb,piez,3 ! Piezoelectric matrix 72A??? 99.3.4
tbdata,1,0,0,-12.3082
tbdata,4,0,0,-12.3082
tbdata,7,0,0,20.7574
tbdata,10,0,0,0
tbdata,13,0,17.0357,0
tbdata,16,17.0357,0,0
!------------------------ model---------------------------
NUMSTR,KP,1
NUMSTR,LINE,1
NUMSTR,AREA,1block,0,10,0,5,0,1type,3
mat,3esize,0.5vmesh,all!------------boundary condition-----------------------nsel,s,loc,x,0
d,all,ux
d,all,uy
d,all,uz! -------------COUPLE THE TWO FACE OF ELECTRODE -------------nsel,s,loc,x,10
cp,11,volt,all
*get,front,node,,num,minnsel,s,loc,x,0
cp,21,volt,all
*get,back,node,,num,minALLSfinish!-------------------------------------------
/soluantype,staticALLS
d,front,volt,voh
d,back,volt,volESEL,S,TYPE,,3
NSLE
D,ALL,TEMP
D,ALL,MAG
ALLSsavesolvefini/eof

复制代码

linlin820 · 发表于 2006-3-23 16:07

（3）对压电陶瓷加x向位移（压力），产生电压，电压会让结构z变形

/PREP7
/GRAPHICS,FULL
!############################## parameter #######################
*AFUN,DEGVOL=0
VOH=20!########################### Material property #################!****************** 3---PZT **************************
et,3,solid5 ! UX,UY,UZ,TEMP,VOLT,MAG
!mp,nuxy,3,0.27
mp,dens,3,7.64e3 ! kg/m3
mp,perx,3,8.93e-9 ! F/m
mp,pery,3,8.93e-9 ! F/m
mp,perz,3,6.92e-9 ! F/m
mp,kxx,3,1
mp,murx,3,1tb,anel,3 ! Anisotropic elastic matrix 72A??? 99.3.4
tbdata,1,11.565e10,6.489e10,6.229e10,0,0,0
tbdata,7,11.565e10,6.229e10,0,0,0
tbdata,12,9.298e10,0,0,0
tbdata,16,1.786e10,0,0
tbdata,19,1.786e10,0
tbdata,21,1.786e10tb,piez,3 ! Piezoelectric matrix 72A??? 99.3.4
tbdata,1,0,0,-12.3082
tbdata,4,0,0,-12.3082
tbdata,7,0,0,20.7574
tbdata,10,0,0,0
tbdata,13,0,17.0357,0
tbdata,16,17.0357,0,0!------------------------ model---------------------------
NUMSTR,KP,1
NUMSTR,LINE,1
NUMSTR,AREA,1block,0,10,0,5,0,1type,3
mat,3esize,0.5vmesh,all!------------boundary condition-----------------------nsel,s,loc,x,0
d,all,ux
d,all,uy
d,all,uznsel,s,loc,x,10
d,all,ux
d,all,uy
d,all,uz,-0.01!-------------------------------------------
/soluantype,staticALLSESEL,S,TYPE,,3
NSLE
D,ALL,TEMP
D,ALL,MAG
ALLSsavesolvefini/eof

复制代码

说明:没有贴出结果，请自己运行比较各个例子的结构变形，电压分布,进行研究.

转自:simwe 作者:ansyssimulation

fnaaa · 发表于 2006-4-13 19:20

请指教

jiangxuchu · 发表于 2006-4-14 09:46

谢谢！对5楼的同志我的回答是肯定的。

fnaaa · 发表于 2006-4-14 17:36

那矩阵是怎么算出来的.请问

AaronSpark · 发表于 2006-5-31 06:57

建议看一下《ANSYS高级工程有限元分析范例精选》这本书吧

xuruikl · 发表于 2008-3-24 14:37

那个警告的问题倒不是很大
只是提示你既在有限元模型上加载了，也在几何模型上加载了
程序会自动转换到有限元模型上的

kch0341155 · 发表于 2009-8-27 14:29

对Z向加电压产生膨胀收缩
! -------------COUPLE THE TWO FACE OF ELECTRODE -------------
nsel,s,loc,z,1
cp,11,volt,all
*get,ntop,node,,num,min

nsel,s,loc,z,0
cp,21,volt,all
*get,nbot,node,,num,min

ALLS

finish
/eof
!-------------------------------------------
/solu

antype,static

ALLS
d,nTOP,volt,voh
d,nBOT,volt,vol

ESEL,S,TYPE,,3
NSLE
D,ALL,TEMP
!D,ALL,MAG
ALLS

nsel,all
esel,all

前面的我都看懂了能不能麻烦哪位大大解释下后面部分的 APDL命令干什么用的？

ton121212 · 发表于 2010-4-10 13:35

后面的就是施加电压荷载吧，volt不就是voltage吗，嘿嘿

6055066 · 发表于 2011-7-10 15:50

HAODONGXI

lulu_19870913 · 发表于 2012-3-11 22:52

很好的东西哦

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[结构分析] [求助]在做压电陶瓷的瞬态分析时出现了如下提示！！

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