Model smoothing method of contact-impact dynamics in flexible multibody systems

被引：23

作者：

Zhang, Xingang ^{[1
]}

Qi, Zhaohui ^{[1
]}

Wang, Gang ^{[2
]}

Guo, Shudong ^{[1
]}

机构：

[1] Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Sch Ocean Sci & Technol, Panjin 124221, Peoples R China

来源：

MECHANISM AND MACHINE THEORY | 2019年 / 138卷

基金：

中国国家自然科学基金;

关键词：

Flexible multibody system; Contact-impact problem; LCP; Model smoothing method; Stiff ODEs; CABLE-PULLEY SYSTEMS; MECHANICAL SYSTEMS; COMPLIANT CONTACT; TIME INTEGRATION; FORCE MODELS; SIMULATION; FORMULATION; EQUATIONS; FRICTION; JOINTS;

D O I：

10.1016/j.mechmachtheory.2019.03.039

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An original model smoothing method for contact-impact dynamics in flexible multibody system is proposed in this work. First, the model smoothing method is applied to improve the computational efficiency, in which the instant stresses of flexible bodies are replaced by the time-averaged stresses in a short time during the modeling stage, the resulting equations of motion do not contain high frequency components. In the following, the fundamental issues of continuous contact force models are discussed. A smoothing method of modeling linear complementarity problem (LCP) is proposed for the dynamic analysis of flexible multibody system. This approach takes into account the permanent contact and impact, which has the great merit that can be used straightforward without switching contact models. Numerical results show that the model smoothing method is a new effective approach for the numerical analysis of contact-impact problems in flexible multibody system. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：124 / 148

页数：25

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