压电纵振动换能器,前盖板硬铝,压电陶瓷PZT-4,后盖板和预应力杆45钢。模型是面对称,而非轴对称,建立1/4模型。
问题:
1,在水中,谐响应分时,如何建立水环境并施加约束?
2,对称约束-----但运行时,只有一个轴的对称约束,另一个轴不知道是不显示还是无法施加
3,水环境中,无法提取压力值
4,水环境建模很差,望指点
程序如下:
/PREP7
!
ET,1,SOLID45,0
ET,2,SOLID5,3
ET,3,FLUID30
ET,4,FLUID130
R,4,0.2,0,0,0.072
ET,5,FLUID30,,1
!2(PZT-4)
MP,DENS,2,7.5E3
!弹性系数
TB,ANEL,2
TBDATA,1,13.2E10,7.1E10,7.3E10
TBDATA,7,13.2E10,7.3E10
TBDATA,12,11.5E10
TBDATA,16,3.0E10
TBDATA,19,2.6E10
TBDATA,21,2.6E10
!介电常数
MP,PERX,2,804.6
MP,PERY,2,804.6
MP,PERZ,2,659.7
!压电常数
TB,PIEZ,2
TBDATA,3,-4.1
TBDATA,6,-4.1
TBDATA,9,14.1
TBDATA,14,10.5
TBDATA,16,10.5
!(4#FE)
MP,DENS,1,7.8E3
MP,EX,1,2E11
MP,PRXY,1,0.28
!硬铝
MP,DENS,3,2.7E3
MP,EX,3,7.28E11
MP,PRXY,3,0.33
!水
MP,DENS,4,1030
MP,SONC,4,1460
!模型建立
K,1,0,0
K,2,0,5E-3
K,3,0,10E-3,20E-3
K,4,0,10E-3,23E-3
K,5,0,0,23E-3
K,6,33.5E-3,0
L,1,6
A,1,2,3,4,5
VDRAG,1,,,,,,1
!
CYLIND,0.002,,0,0.023,,90
VSBV,1,2
CYLIND,0.01,0.0025,0.023,0.059,,90
CYLIND,0.002,,,0.059,,90
CONE,0.01,0.0475,0.059,0.070,,90
/VIEW,1,1,1,1
/ANG,1
/REP,FAST
WPROTA,0,0,-90
WPOFFS,,,-0.0335
VSBW,4
VDELE,5,,,1
WPROTA,0,90,
WPOFFS,,0.0335,-0.0335
VSBW,6
VDELE,4,,,1
WPROTA,,,90
WPROTA,-90,,
WPOFFS,0,-0.0335,
WPOFFS,,,0.07
BLOCK,,0.0335,,0.0335,,0.002
WPOFFS,,,0.002
SPHERE,0.2,,,90
VSBW,6
VDELE,7,,,1
WPOFFS,,,-0.072
VGLUE,ALL
!材料赋值
VSEL,S,,,10
VSEL,A,,,7
VATT,1,,1
VSEL,S,,,1
VATT,2,,2
VSEL,S,,,9
VATT,3,,1
VSEL,S,,,4
VATT,4,,3
VSEL,S,,,6
VATT,4,,5
ALLSEL
!网格化
VSEL,S,,,1
VSWEEP,ALL
MSHAPE,1,3D
MSHKEY,0
FLST,5,5,6,ORDE,5
FITEM,5,4
FITEM,5,6
FITEM,5,-7
FITEM,5,9
FITEM,5,-10
VSEL, , , ,P51X
VMESH,ALL
ALLSEL
!定义无限边界
CSYS,2
ASEL,S,,,40
NSLA,S,1
TYPE,4
MAT,4
REAL,4
esurf
ALLSEL
!对称约束-----但运行时,只有一个轴的对称约束,另一个轴不知道是不显示还是无法施加
NSEL,S,LOC,X,0
DSYM,SYMM,X
NSEL,S,LOC,Y,0
DSYM,SYMM,Y
NSEL,ALL
ASEL,S,,,1
NSLA,S,1
CP,1,VOLT,ALL
*GET,N1,NODE,,NUM,MIN
D,N1,VOLT,0
ASEL,S,,,2
NSLA,S,1
CP,2,VOLT,ALL
*GET,N2,NODE,,NUM,MIN
D,N2,VOLT,20
NSEL,ALL
/SOLU
EQSLV,SPARCE
DMPR,0.01
ANTYPE,HARMIC
OUTRES,ALL,ALL
HARFRQ,7000,20000
NSUBST,26
KBC,1
SOLVE
/POST26
RFORCE,2,N1,AMPS
PI2=3.14159*2
CFACT,0,-1
PROD,3,2,1,,MHOS,,,,PI2
REALVAR,4,3,,,REAL3
IMAGIN,5,3,,,IMAG3
PLVA,4,5 |