A SOLUTION PROCEDURE FOR LOWER BOUND LIMIT AND SHAKEDOWN ANALYSIS BY SGBEM-中国期刊网

摘要 ThesymmetricGalerkinboundaryelementmethod(SGBEM)insteadofthefiniteelementmethodisusedtoperformlowerboundlimitandshakedownanalysisofstructures.Theself-equilibriumstressfieldsareconstructedbyalinearcombinationofseveralbasicself-equilibriumstressfieldswithparameterstobedetermined.Thesebasicself-equilibriumstressfieldsareexpressedaselasticresponsesofthebodytoimposedpermanentstrainsandobtainedthroughelastic-plasticincrementalanalysis.Thecomplexmethodisusedtosolvenonlinearprogramminganddeterminethemaximalloadamplifier.Thelimitanalysisistreatedasaspecialcaseofshakedownanalysisinwhichonlytheproportionalloadingisconsidered.ThenumericalresultsshowthatSGBEMiseffcientandaccurateforsolvinglimitandshakedownanalysisproblems.

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A SOLUTION PROCEDURE FOR LOWER BOUND LIMIT AND SHAKEDOWN ANALYSIS BY SGBEM

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A SOLUTION PROCEDURE FOR LOWER BOUND LIMIT AND SHAKEDOWN ANALYSIS BY SGBEM

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