应用数学和力学2023，Vol.44Issue(11)：1366-1377,12.DOI:10.21656/1000-0887.430368
基于模态自适应的大变形多体系统动力学分析
Dynamics Analysis of Large-Deformation Flexible Multibody Systems Based on the Adaptive Modal Selection Method
摘要
Abstract
During the modal truncation to reduce the model order of flexible multibody systems,the inappro-priate modal selection would impair the precision of dynamic responses,or even cause divergent solutions.Thus,an efficient method of adaptive modal selection based on the absolute nodal coordinate formulation(AN-CF)was proposed for large-deformation flexible multibody systems.The dynamic model for the system was es-tablished with the ANCF beam elements.The full modal sparse representation was used for the coordinates of the interior region.The sampling matrix was built through the Latin hypercube sampling to reduce the number of dynamic equations.The sparse modal coordinates'norm optimization problem was constructed with the sampling dynamic equations as constraints,to which the solution could give modes of significant contribution.Two examples show that,the numerical results are very close to the results of common methods and the com-putation efficiency markedly improves.关键词
柔性多体动力学/自适应选择/动态响应/绝对节点坐标法(ANCF)Key words
flexible multibody dynamics/adaptive selection/dynamic response/absolute nodal coordinate for-mulation(ANCF)分类
信息技术与安全科学引用本文复制引用
刘泽斌,李海艳,詹宏远,梁桂铭..基于模态自适应的大变形多体系统动力学分析[J].应用数学和力学,2023,44(11):1366-1377,12.基金项目
国家自然科学基金项目(51375297) （51375297）
