Question

学长，我看到您比较精通ansys的压电分析，想请教你个问题。

我在用plane13分析一个二维的压电平板。施加一个梯形的电压脉冲进行瞬态分析。我的命令流导入到ansys里头不报错，但是分析出来的结果显示，压电片没有产生变形。

/COM, ---------------------------------------------------------------
/COM, FINITE ELEMENT MODEL OF A PIEZOELECTRIC CIRCULAR PLATE
/COM, ---------------------------------------------------------------
A=100e-6
T=500e-6
V=40
/COM,
/COM, MATERIAL PROPERTIES OF LEAD ZIRCONATE TITANATE (PZT-5A)
/COM,
/COM, -- MATERIAL MATRICES (POLAR AXIS ALONG Y-AXIS): IEEE INPUT
/COM,
/COM, [s11 s13 s12 0 0 0 ] [ 0 d31 0 ] [ep11 0 0 ]
/COM, [s13 s33 s13 0 0 0 ] [ 0 d33 0 ] [ 0 ep33 0 ]
/COM, [s12 s13 s11 0 0 0 ] [ 0 d31 0 ] [ 0 0 ep11]
/COM, [ 0 0 0 s44 0 0 ] [ 0 0 d15]
/COM, [ 0 0 0 0 s66 0 ] [ 0 0 0 ]
/COM, [ 0 0 0 0 0 s44] [d15 0 0 ]
/COM,
/COM, - COMPLIANCE COEFFICIENTS, M2/N
S11=16.4E-12
S12=-5.74E-12
S13=-7.22E-12
S33=18.8E-12
S44=47.5E-12
S66=44.3E-12
/COM, - PIEZOELECTRIC STRAIN COEFFICIENTS, C/N
D15=5.84E-10
D31=-1.71E-10
D33=3.74E-10
/COM, - RELATIVE PERMITTIVITY AT CONSTANT STRESS
EP11=1730
EP33=1700
/COM, - DENSITY, KG/M3
RHO=7750
/NOPR

/PREP7
/COM,
/COM, -- MATERIAL MATRICES (POLAR AXIS ALONG Y-AXIS): ANSYS INPUT
/COM,
/COM, [s11 s13 s12 0 0 0 ] [ 0 d31 0 ] [ep11 0 0 ]
/COM, [s13 s33 s13 0 0 0 ] [ 0 d33 0 ] [ 0 ep33 0 ]
/COM, [s12 s13 s11 0 0 0 ] [ 0 d31 0 ] [ 0 0 ep11]
/COM, [ 0 0 0 s44 0 0 ] [d15 0 0 ]
/COM, [ 0 0 0 0 s44 0 ] [ 0 0 d15]
/COM, [ 0 0 0 0 0 s66] [ 0 0 0 ]

TB,ANEL,1,,,1 ! PZT-5A参数
TBDA,1,S11,S13,S12
TBDA,7,S33,S13
TBDA,12,S11
TBDA,16,S44

TB,PIEZ,1,,,1
TBDA,2,D31
TBDA,5,D33
TBDA,8,D31
TBDA,10,D15

TB,DPER,1,,,1
TBDA,1,EP11,EP33

TBLIS,ALL

MP,DENS,1,RHO

ET,1,PLANE13,7,,1 !plane13单元

RECTNG,0,A,0,T !建模画网格

ESIZE,10E-6
AMESH,1

NSEL,S,LOC,y,0 !位移约束
D,ALL,UY,0
NSEL,ALL

NSEL,S,LOC,Y,0 !耦合电压
CP,1,VOLT,ALL
*GET,NBOT,NODE,0,NUM,MIN
NSEL,S,LOC,Y,T
CP,2,VOLT,ALL
*GET,NTOP,NODE,O,NUM,MIN
NSEL,ALL

FINI
/SOLU
ANTYPE,TRANS !瞬态分析
TRNOPT,FULL
TINTP,,0.25,0.5,0.5
OUTRES,ALL,ALL
KBC,0

D,NBOT,VOLT,0
ALLSEL,ALL

TIME,2E-9
DELTIM,2e-9
D,NTOP,VOLT,0
ALLSEL,ALL

TIME,2E-6
DELTIM,2E-8
D,NTOP,VOLT,V
ALLSEL,ALL

TIME,12E-6
DELTIM,2E-8
D,NTOP,VOLT,V
ALLSEL,ALL

TIME,14E-6
DELTIM,2E-8
D,NTOP,VOLT,0
ALLSEL,ALL

SOLVE

Answer 1

你是不是没有把材料属性定义完整呢，好像是没有电阻率，以及电导率