Analyzing Way for Elastic Body in MBS Based on Superelement Method

机译：基于超单元法的MBS弹性体分析方法

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By the use of theories of Finite Element Method(FEM) and multibody system(MBS), the kinematics expression of elastic body in multibody system, its elastic deformation described with Rayleigh-Ritz method and its equation of motion based on d’Alembert law and Jourdain's virtual power principle are studied in detail. And the processing method to express the characteristic information of elastic body with FE means and to apply the information in vehicle system are also studied and analyzed. Based on above theories, the complete FE model of a frame in vehicle system is condensed by the superelement method, which greatly reduces the DOF of frame expressed in multibody system. And the precision of results is guaranteed simultaneously. Solutions of the frame show that the method presented here can solve elastic body in vehicle system exactly and fast, and has high precision, stability and reliability in concerned frequency range to meet the need of scientific researches and the practical analysis of structural vibration.

机译：利用有限元理论和多体系统理论，研究了多体系统中弹性体的运动学表达式，并利用d'Alembert定律和Rayleigh-Ritz方法描述了其弹性变形以及运动方程。详细研究了Jourdain的虚拟权力原则。并且研究和分析了用有限元手段表达弹性体特征信息并将其应用于车辆系统的处理方法。基于以上理论，采用超单元法对车辆系统框架的完整有限元模型进行了压缩，大大降低了多体系统中框架的自由度。同时保证结果的准确性。框架求解表明，本文提出的方法可以准确，快速地求解车辆系统中的弹性体，在相关频率范围内具有较高的精度，稳定性和可靠性，可以满足科学研究和结构振动的实际分析需要。

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《World Congress on Intelligent Control and Automation;WCICA 2010》|2010年|p.5533-5537|共5页
会议地点 Jinan(CN);Jinan(CN)
作者
Zhichun Sun; Zhili Zhou; Yan Li;
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作者单位

The Faculty of Mechanical and Precision Instrument Engineering Xi’an University of Technology Xi’an Shanxi Province China Jining Vocational Technology College Jining Shandong China;

School of Vehicle & Motive Power Engineering Henan University of Science and Technology Luoyang Henan China;

The Faculty of Mechanical and Precision Instrument Engineering Xi’an University of Technology Xi’an Shanxi Province China;

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multibody system; elastic body; FEM; Condensation Solution;

机译：多体系统弹性体有限元冷凝液;

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Analyzing Way for Elastic Body in MBS Based on Superelement Method

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