abaqus分析收敛控制

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1、AbaqusAnalysisUser'sManual 7.2.1 Convergenceandtimeintegrationcriteria:overviewNumerouscontrolparametersareassociatedwiththeconvergenceandintegrationaccuracyalgorithmsinAbaqus/Standard.Theseparametersareassigneddefaultvaluesthatarechosentooptimizetheaccuracyande

2、fficiencyofthesolutionforawidespectrumofnonlinearproblems.Youcanchangethesolutioncontrolparameters,asdescribedinthefollowingsections:·Abriefsynopsisofthemoreimportantsolutioncontrolparameters,togetherwithadescriptionofthecircumstancesinwhichtheycanbeusedeffectiv

3、ely,isprovidedin“Commonlyusedcontrolparameters,”Section7.2.2.Thissectionislikelytobethemostusefulforthegeneraluserandshouldbereadfirst.·Abaqus/Standardincorporatesanempiricalalgorithmdesignedtosolvetheequilibriumequationsofnonlinearsystemsaccuratelyandeconomical

4、ly.Thecriteriausedtoestablishconvergenceofnonlinearincrementsandtheautomaticadjustmentofincrementsizebasedontheconvergenceratearedescribedin“Convergencecriteriafornonlinearproblems,”Section7.2.3.·Abaqus/Standardallowsyoutochoose“timeintegrationaccuracyparameters

5、”inproblemsthathaveaphysicaltimescale.Thealgorithmsthatusetheseparametersforautomaticallycontrollingtimeincrementsizesaredescribedin“Timeintegrationaccuracyintransientproblems,”Section7.2.4.·Abaqus/CFDallowsyoutochoosethecontrolparametersusedinanAbaqus/CFDtoAbaq

6、us/StandardortoAbaqus/Explicitco-simulationtoalleviateinstabilityandmeshdistortionduringtheanalysis.ModifyingthedefaultsolutioncontrolsThedefaultvaluesforthesolutioncontrolparametersneednotbeadjustedformostcases.Youcanresetthem,however,withinastepdefinition.Valu

7、esgivenforthesolutioncontrolparametersremainineffectfortheremainderoftheanalysisoruntiltheyarereset.Input File Usage:          *CONTROLSThe*CONTROLSoptioncanberepeated,ifnecessary,withdifferentparameters.Abaqus/CAE Usage:   Stepmodule:OtherGeneralSolutionControl

8、sEdit:toggleonSpecifyResettingalldefaultsolutioncontrolsYoucanrestoreallsolutioncontrolparameterstotheirdefaultvalues.Input File Usage:          *CONTROLS,RESETAbaqus