制动副间非线性时变摩擦导致的制动尖叫演变规律及抑制方法研究

项目名称： 制动副间非线性时变摩擦导致的制动尖叫演变规律及抑制方法研究

项目编号： No.51275022

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 刘献栋

作者单位： 北京航空航天大学

项目金额： 85万元

中文摘要： 汽车制动器制动尖叫已成为改善交通噪声环境亟待解决的问题。然而产生尖叫的机理非常复杂，涉及到非线性动力学、接触力学、摩擦学、声学、热学等多个学科。由于制动副表面摩擦特性、接触刚度、制动衬块材料阻尼等参数在制动过程中的非线性时变特性，使得所建描述制动器系统动态特性的模型不完善，致使至今仍无可靠的抑制制动尖叫的理论用于指导设计。本申请拟通过对制动副接触面摩擦特性随温度、转速等的时变性规律研究，建立非线性时变摩擦模型；在此基础上，融合摩擦学和结构动力学理论，建立制动器系统的非线性动力学模型；应用非线性动力学定性理论和瞬态动力学研究方法，揭示制动器系统的非线性时变力学行为；发展非线性系统信号的时频分析方法，获得制动尖叫随时变参数的演变规律及抑制方法；通过台架实验，验证所得制动尖叫演变规律和抑制方法。本研究可促进摩擦学、结构动力学、声学等学科的交叉融合和发展，同时可推动摩擦噪声抑制理论的进步与完善。

中文关键词： 非线性时变摩擦；制动尖叫；噪声抑制；演变规律；时频分析

英文摘要： Automotive brake squeal has become a challenging issue to reduce traffic noise. However, the generation mechanism of brake squeal is extremely complex, involving multiple disciplines such as nonlinear dynamics, contact mechanics, tribology and acoustics.Because of the nonlinear time-varying system parameters in braking, such as friction coefficient, contact stiffness and damping in brake pads, the existing models can not accurately represent the dynamic behavior of brake system. Consequently the perfect low noise brake design theory has not been proposed yet. In this project,the friction properties of contact surfaces of brake pair varying with temperature and relative slip velocity and other key parameters will be explored so as to establish the nonlinear time-varying friction model. Based on the tribology and structural dynamics theory, the nonlinear dynamic model of the brake system will aslo be established. The time-varying mechanics behaviors of the brake system will be investigated using the nonlinear dynamics theory and transient dynamic analysis methods. The time-frequency analysis method will be researched and applied to obtain the evolution law with time-varying parameters and suppression method of brake squeal. The bench test of brake squeal will also be performed to verify the evolution law and suppr

英文关键词： nonlinear time-varying friction；brake squeal；noise suppression；evolution law；time-frequency analysis