基于接触动力学的座圈动态响应仿真分析

Dynamic Response Simulation Analysis of Turret Race Based on Contact Dynamics

座圈是履带车辆上的一个关键件,根据接触动力学理论,对座圈子系统的动态响应进行了分析研究。首先结合有限元和多体动力学分析技术,创建面向柔性下座圈的整车刚柔混合模型。考虑座圈子系统中座圈与滚珠的动态接触关系,采用边界盒法搜索上座圈—滚珠—下座圈之间的接触状态,由Hertz接触理论建立非线性弹簧阻尼模型计算接触力。然后以典型工况下座圈动态响应分析为例,对整车样机进行接触动力学仿真分析,获得了柔性下座圈的应力分布及变化情况。

Turret race is a key component of a tracked vehicle. The dynamic response problem of turret race sub-system is analyzed and researched based on contact dynamics theory. Firstly, with finite element and multi-bod- ies dynamics analysis technology, a rigid-flexible mixture model of surface flexible down turret race in the vehicle is constructed. Considering the dynamic contact relationship between turret race and balls in turret race sub-system, bounding box method is adopted to detect the contact state among upper turret race, balls and down turret race. According to Hertz contact theory, a nonlinear spring-damper model is established to calculate contact force. And then, taking the turret race dynamic response analysis under typical operation state as an example, the dynamic simulation analysis of the vehicle prototype is accomplished to obtain stress distribution and variation of the flexible down turret race.