接触力模型对含间隙铰接副多体系统分析的影响

发布时间：2018-05-11 07:04

本文选题：多体系统 + 间隙铰接副　；参考：《西安交通大学学报》2017年11期

【摘要】：为研究接触力模型对含间隙铰接副多体系统动力学分析结果的影响,分析了不同接触力模型中阻尼系数和耗散能的计算方法及其优缺点,并以单球碰撞为例对比分析了各模型耗散能的大小。在此基础上,以含间隙铰接副曲柄滑块机构为例,研究了不同接触力模型对多体系统动力学计算的效率、稳定性及结果的影响。计算结果表明:接触力模型中耗散能的增加可以使多体系统动力学计算结果更快趋于稳定;选取适当的接触力模型可改善动力学方程的求解效率及结果稳定性。针对不同恢复系数,从稳定性、计算效率及适用范围三方面考虑,得出了相应的更具优势的接触力模型。
[Abstract]:In order to study the effect of contact force model on the dynamic analysis results of multi-body system with clearance, the calculation methods of damping coefficient and dissipation energy in different contact force models and their advantages and disadvantages are analyzed. The dissipation energy of each model is compared and analyzed by taking the single sphere collision as an example. On this basis, taking the crank slider mechanism with clearance as an example, the effects of different contact force models on the efficiency, stability and results of multi-body system dynamics calculation are studied. The results show that the increase of dissipative energy in the contact force model can make the dynamic calculation results of multi-body system more stable and the efficiency and stability of solving the dynamic equations can be improved by selecting the appropriate contact force model. Considering the stability, calculation efficiency and application range of different recovery coefficients, a more advantageous contact force model is obtained.
【作者单位】：西安交通大学现代设计及转子轴承系统教育部重点实验室;新加坡国立大学冲击力学实验室;
【基金】：国家自然科学基金资助项目(51175409,51775413)
【分类号】：TH113

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