ANSYSHelpViewer(压电仿真)

chanicalpr oductsonly)arestatic,modal,harmonic,andtransient.

Todoapiezoelectricanalysis,youneedtouse oneoftheseelementtypes:

PLANE13,KEYOPT(1)=7coupled- fieldquadrilateralsolid

SOLID5,KEYOPT(1)=0or3coupled-fieldbrick

SOLID98,KEYOPT(1)=0or3coupled- fieldtetrahedron

PLANE223,KEYOPT(1)=1001,coupled- field8-nodequadrilateral

SOLID226,KEYOPT(1)=1001,coupled- field20-nodebrick

SOLID227,KEYOPT(1)=1001,coupled- field10-nodetetrahedron

TheKEYOPTsettin gsactivatethepiezoelectricdegreesoffreedom,displac emen

SOLID5

and

SOLID98

,settingKEYOPT(1)=3activa testhepiezoel

ectriconlyoption.

< br>Largedeflections,stressstiffeningeffects,andpre stresseffectsareavailablevi

athe

< br>NLGEOM

and

PSTRES

commands.(Seethe

CommandReference

formorein

StructuralAnal ysisGuide

and

Structures

withGeometricNonlinearities

ofthe

MechanicalAPDLTheoryReference

f ormore

informationonthesecapabilities.)C urrent-technologyelements

PLANE223

,

SO

LID226

and

SOLID227

alsosupportalinearpe rturbationpiezoelectricanalysis.(Se

e

LinearPerturbationAnalysis

inthe

StructuralAnalysisGuide

forin formationabo

uttheprocedure.)

For

PLANE13

,largedeflectiona ndstressstiffeningcapabilitiesareavailableforK

EYOPT(1)=

SOLID5

and

SOLID98

,largedeflectionandstres sstiffeningcapa

bilitiesareavailableforK EYOPT(1)=tion,smalldeflectionstressstiffening

Foralarge-deflectionpiezoelectricanalys is,youmustusenonlinearsolutioncom

eralin formationonthesecommands,refer

to

SetSolutionControls

inthe

StructuralAnalysisGuide

.

For sampleanalyses,see

Example:Piezoelectric Analysis

and

Example:Piezoelec t

ricAnalysiswithCoriolisEffect

.

ndRecommendationsforPiezoel ectricAnalysis

Theanalysismaybestatic,m odal,harmonic,transient,orprestressedmodal,harm

onic,portantpointstorememberare:

?

Formodalanalysi s,

czosisnotsupp

ortedunlessus ing

Lev_Diff

=5onthe

PCGOPT

command.

?

Forstatic,fullharmonic,orfulltransienta nalysis,selectthesparsemat

rix(SPARSE)so lverortheJacobiConjugateGradient(JCG)

dingonthechosensystemofunitsormaterialpro pertyvalues,theasse

lvingill-conditioned

matrices,theJCGiterativesolvermayconver getothewrongsolution.

Theassembledmatrix typicallybecomesill-conditionedwhenthemag

nitudesofthestructuralDOFandelectricalDOFstartto varysignifican

tly(morethan1e15).

?

Fortransientana lyses,specify

ALPHA

= 0.25, < /p>

DELTA

=0.5,and

THETA

=0.5onthe

TINTP

com mand(

MainMenu>Pr

eprocessor>L oads>Time/Frequenc>TimeIntegration

).

?

Alinearperturba tionpiezoelectricanalysisisavailableonlywith

PLANE

223

,

SOL ID226

,and

SOLID227

elements.

?

For

PLANE13

,

SOLID5

,and

SOLID98

,theforce labelfortheVOLTDOFis

PLANE223

,

SOLID226

,and