我最近做压电分析,通过采用在压电陶瓷上加电压,使圆环形薄板产生弯曲振动的仿真分析。
结构如下:上为带8个齿的弹性体(铝)
下为环形压电陶瓷(极化方向沿Z轴;陶瓷沿环形八个分区)
在一个分区加载电压(一面330v,一面0v),进行谐响应分析(由模态分析得f=7086hz)
求解结果如下图所示:
最后两个图为位移图,图中出现两个突起是什么原因所致?
各位高手看看是哪里出了错?
附APDL:
finish
/clear
/prep7
*SET,H,2e-3!
*SET,r1,22e-3!
*SET,r2,25.5e-3!
*SET,r3,40e-3!
*SET,h1,0.5e-3!
*SET,h2,0.8e-3!
*SET,r5,33e-3
*SET,r6,38e-3
*SET,M,3e-3
*SET,theta,0
et,1,solid95
et,2,solid226,1001
et,3,mesh200,7
! MP,Lab,MAT,C0,C1,C2,C3,C4 p
mp,ex,1,20.1e10
mp,dens,1,7810
mp,prxy,1,0.29
mp,dens,2,7450
mp,ex,2,13.2e10
mp,prxy,2,0.32
! -- Piezoelectric coefficients, pC/um2
*SET,e11,0.171
*SET,e14,-0.0406
tb,PIEZ,2
tbdata,1,e11
tbdata,4,-e11
tbdata,7
tbdata,10,0,-e11,0
tbdata,13,e14
tbdata,16,0,-e14,0
! -- Dielectric constants
emunit,EPZRO,8.854e-6! pF/um
mp,PERx,2,4.43
mp,PERy,2,4.43
mp,PERz,2,4.63
mp,dens,3,7450
mp,ex,3,13.2e10
mp,prxy,3,0.32
! -- Piezoelectric coefficients, pC/um2
*SET,e11,0.171
*SET,e14,-0.0406
tb,PIEZ,3
tbdata,1,-e11
tbdata,4,e11
tbdata,7
tbdata,10,0,e11,0
tbdata,13,-e14
tbdata,16,0,e14,0
! -- Dielectric constants
emunit,EPZRO,8.854e-6! pF/um
mp,PERx,3,4.43
mp,PERy,3,4.43
mp,PERz,3,4.63
csys,1
k,1,r1,,-h2/2
k,2,r2,,-h2/2
k,3,r2,,-H/2
k,4,r2,,-H/2-h1
k,5,r5,,-H/2-h1
k,6,r6,,-H/2-h1
k,7,r3,,-H/2-h1
k,8,r3,,-H/2
k,9,r3,,H/2
k,10,r6,,H/2
k,11,r5,,H/2
k,12,r2,,H/2
k,13,r2,,h2/2
k,14,r1,,h2/2
k,15,r5,,-H/2
k,16,r6,,-H/2
k,17
K,18,0,,H
*do,i,1,13
L,i,i+1
*enddo
l,1,14
l,3,15
l,15,16
l,5,15
l,11,15
l,6,16
l,10,16
l,8,16
lplot
al,1,2,15,18,11,12,13,14
al,18,16,20,10
al,8,9,20,21
al,3,4,17,15
al,5,19,16,17
al,6,7,21,19
lsel,s,,,18,20,2
lsel,a,,,8
lesize,all,,,3
lsel,s,,,3,7,4
lsel,a,,,17,19,2
lesize,all,,,2
lsel,s,,,6,9,3
lsel,a,,,21
lesize,all,,,2
lsel,s,,,12,14,2
lsel,a,,,2
lesize,all,,,1
lsel,s,,,1,13,12
lesize,all,,,4
lsel,s,,,11,15,4
lsel,a,,,4
lesize,all,,,8
lsel,s,,,10,16,6
lsel,a,,,5
lesize,all,,,5
lsel,all
aglue,all
asel,s,area,,1,3,1
!AATT,MAT,REAL,TYPE,ESYS,SECN
aatt,1,,3
allsel,all
!asel,s,area,,4,6,1
!aatt,2,,3
allsel,all
Vrotat,1,2,3,4,5,6,17,18,360,8
wpoffs,0,0,H/2
cyl4,0,0,r5,22.5,r6,26,M
cyl4,0,0,r5,67.5,r6,71,M
cyl4,0,0,r5,112.5,r6,116,M
cyl4,0,0,r5,157.5,r6,161,M
cyl4,0,0,r5,202.5,r6,206,M
cyl4,0,0,r5,247.5,r6,251,M
cyl4,0,0,r5,292.5,r6,296,M
cyl4,0,0,r5,337.5,r6,341,M
!vadd,all
vglue,all !体粘接
vsel,s,volu,,57,64,1
vatt,1,,1
allsel,all !
vsel,s,,,4,6,1
vsel,a,,,16,18,1
vsel,a,,,28,30,1
vsel,a,,,40,42,1
!VATT,MAT,REAL,TYPE,ESYS
vatt,2,,2
allsel,all
vsel,s,,,10,12,1
vsel,a,,,22,24,1
vsel,a,,,34,36,1
vsel,a,,,46,48,1
vatt,3,,2
allsel,all
allsel,all
vsweep,all
finish
/solu
antype,harmic
hropt,full
solcontrol,on
csys,1
nsel,s,loc,x,r1
nplot
d,all,all
allsel,all
eplot
asel,s,area,,160,166,3
da,all,volt,300 !
allsel,all
asel,s,area,,144,151,7
asel,a,area,,157
da,all,volt,0
harfrq,7086, !
nsubst,1
allsel,all
solve
FINISH
|