车轮双侧踏面制动尖叫噪声和颤振的有限元分析  

A FINITE ELEMENT ANALYSIS OF THE SQUEAL AND CHATTER PROPENSITY FOR A DOUBLE PADS-WHEEL BRAKE SYSTEM

作　　者：陈光雄[1] 戴焕云[1] 曾京[1] 周仲荣[1] 

机构地区：[1]西南交通大学摩擦学研究所牵引动力实验室,四川成都610031

出　　处：《工程力学》2009年第4期234-239,共6页Engineering Mechanics

基　　金：教育部新世纪优秀人才项目(NCET-06-0798);国家自然科学群体项目(50521503)

摘　　要：建立了铁路客车车轮双侧踏面制动系统的有限元模型,利用ABAQUS软件对该制动系统进行制动摩擦尖叫噪声和颤振的有限元复特征值预测分析。在有限元模型中,闸瓦与车轮之间的法向力根据接触计算确定,不需假设接触弹簧。该模型考虑了制动系统部件材料特性、摩擦系数、转动速度和闸瓦压力对尖叫噪声和颤振的影响。分析结果显示,闸瓦压力角对制动尖叫和颤振有重要影响,当闸瓦压力角α=5°时,制动系统发生尖叫噪声和颤振的可能性最低。计算结果还显示,摩擦系数越大,系统发生尖叫噪声和颤振的趋势就越大。A finite element model of a double pads-wheel brake system for railway passenger vehicles was established. The squeal and chatter propensity of the brake system was predicted using ABAQUS software. In the model, the direct contact coupling at the wheel/pads interface is applied to obtain normal contact forces, so there is no need to introduce contact springs at the interface. The model takes into account the effects of material properties, friction coefficient, rotational speed of the wheel and the normal force acting on pads. The analysis result shows that the pressure angle between the normal line of pads and horizontal line has a distinct effect on the occurrence of squeal and chatter. When the angle is 5°, the generation propensity of squeal and chatter is largely suppressed. It also demonstrates that the squeal and chatter is more likely to occur with increasing coefficient of friction.

关 键 词：制动 噪声 尖叫 颤振 摩擦 有限元 

分 类 号：TH117[机械工程—机械设计及理论]