间隙旋转铰接触碰撞自适应检测算法

摘要

Two relative motions of contact and separation exist between the journal and bear-ing of the clearance joint.To detect different motion states,the two-state model of clearance joint is refined to a two-state/three-stage model.Detection conditions of contact-impact are expressed with vector clearance and kinematics relations.An adaptive variable step detection algorithm is proposed and applied to dynamically analyze the crank and connecting rod mechanism with clear-ance joint.Finally,clearance joint dynamics response is obtained.%间隙旋转铰销轴和轴套间存在碰撞接触、分离两种相对运动状态。为检测不同运动状态，将间隙铰两状态模型细化为两状态3阶段模型(接触临界分离)，基于间隙矢量法和运动学关系构造接触碰撞检测条件，提出了3阶段自适应变步长检测算法。将检测算法用于含间隙铰曲柄连杆机构动力学分析，获得了间隙铰动力学响应，接触碰撞阶段运动特性呈现剧烈波动，分离阶段则连续光滑变化。