考虑非线性刚度的间隙球铰碰撞动力学建模与仿真

doi:10.13229/j.cnki.jdxbgxb.20211166

摘要/Abstract

摘要：

为提高间隙球铰建模分析的准确性，考虑接触体间的非线性接触刚度在碰撞中与机构的耦合特性，建模研究了不同恢复系数与碰撞初速度条件下球铰的接触碰撞特性。结果表明：接触刚度与迟滞阻尼系数避免了在真实接触过程中保持恒定的情况；改进的碰撞力模型更加精确地描述了球铰关节碰撞特性；恢复系数越大，接触力以及变形量的峰值越大，达到峰值时间越长，完成一次碰撞的时间越短；接触碰撞力和变形量随碰撞初速度的增加而迅速增大，完成碰撞的时间减小，更加准确地获得了球铰关节的碰撞特性，为汽车操纵稳定性的精确控制提供了力学基础。

关键词: 车辆工程, 间隙, 球铰, 接触碰撞, 有限元

Abstract:

In order to improve the accuracy of analysis of ball joint with clearance， the coupling characteristics between the non-linear contact stiffness of the contact bodies and the mechanism in the impact were considered， and the contact-impact characteristics of the ball joint was studied under the conditions of different restitution coefficients and initial impact speed. The results show that the contact stiffness and hysteresis damping coefficient avoid the situation that remains constant during the real contact process； the improved model describes the impact characteristics of the spherical joint more currently； the peak contact force and deformation is greater with increase of coefficient of restitution， the longer time it takes to reach the peak and shorter time to complete an impact； the contact-impact force and deformation increase rapidly with the increase of initial velocity， and the time to complete the impact decreases. The accuracy of obtaining the impact characteristics of the spherical joint provides a mechanical basis for the precise control of vehicle handling stability.

Key words: vehicle engineering, clearance, spherical joint, contact-impact, finite element

中图分类号:

U463.46

张树培,夏明悦,张玮,陈钊,陈义祥. 考虑非线性刚度的间隙球铰碰撞动力学建模与仿真[J]. 吉林大学学报(工学版), 2023, 53(8): 2227-2235.

Shu-pei ZHANG,Ming-yue XIA,Wei ZHANG,Zhao CHEN,Yi-xiang CHEN. Impact dynamic modeling and simulation for ball joint with clearance considering nonlinear stiffness[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(8): 2227-2235.

图/表 14

图1

图2

图3

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图5

表1

仿真参数"

参数	数值	参数	数值
球销半径/mm	14	球铰间隙/mm	0.1
球窝内表面半径	14.1	初始速度/（mm·s^-1）	1 000
球销弹性模量/GPa	$206$	球窝弹性模量/GPa	2.6
球销泊松比	0.3	泊松比	0.2
球销密度/（g·cm^-3）	7.82	球销密度/（g·cm^-3）	0.139

表1

图6

图7

图8

图9

图10

图11

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图13

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