共旋框架下二维柔性多体动力学分析策略

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中图分类号：0313.7 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202310039

Abstract：This paperproposes anaccrateandeficient solutionstrategyforanalyzing dynamic responsesofflexiblemultibodysys tems.Intheproposedstrategyflexiblestructuresaremodeledinthecorotationalframe，thenthediscretemathematicalmodelis solvedbyanoptimizedcompositemethod.Duetotheintroductionofthecorotationalframe，someadvancedlinearelementsanbe directlyemployed，dramaticallydecreasingcomputationalcosts.Foraccuratelycalculatingdnamicresponses，anoptimizedtee sub-stepcompositemethod isdeveloped whereinalgorithmic parametersareoptimizedforminimizing local truncationerrors.The optimizedcompositemethdaievessecondderaccracyuncondiionalstabilityandcontrollblestabilitySomeclacalfle ibledynamicsystemsaresolved inthispaper，and numericalresultsshowthatcomparedtothecurrntlypopular solutionstrategy based on the absolute nodal coordinate formulation and the Generalized- α method，under the same computational accuracy，our strategy has great superiorities in efficiency.

Keywords：multibodydynamic;flexible multibodysystems;corotational frame;parameters optimization;compositemethod

具有强非线性、大变形、大转动和大量自由度的柔性多体系统在航空航天、机械制造等领域广泛存在[12]。（剩余10527字）