盘销系统摩擦尖叫瞬态动力学有限元模型

基于ABAQUS软件建立盘-销系统的瞬态动力学有限元模型,在验证模型正确性的基础上分析了系统的运动状态、摩擦副接触状态、系统能量馈入情况以及非线性频率耦合现象.研究发现:制动盘具有压紧翘曲和高频法向面外振动;销棒呈弯曲为主,扭转为辅的振动模式,且表现为纯滑动的极限环运动;接触压力分布周期性变化,法向力和摩擦力变化引起频率的变化;系统同时存在能量馈入和馈出,但占主要地位的能量馈入维持系统的摩擦尖叫.

Finite Element Modelling of Transient Dynamics of Frictional Squeal in Pin on Disc System

A transient dynamic finite element model of disc pin system was established with finite element analysis(FEA) software ABAQUS. The transient dynamics FEA model successfully predicted the disc and pin motion state, the frictional contact state and feed in energy of the system as well as nonlinear frequency coupling phenomenon of the disc pin frictional self excited vibration system. Results showed that, there existed simultaneously warp caused by mechanical action and high frequency normal vibration on disc. Vibration mode of the pin rod was bent based, supplemented by torsional vibration, and had pure sliding limit cycle. The contact pressure distribution had periodic variation characteristic, and the normal and friction force influenced the frequency. There existed simultaneously feed in and feed out energy in the system, and the feed in energy which was dominant in the system caused friction squeal.