CAJ | 학술논문

在制动噪声的有限元分析方法中，复特征值方法预测得到的不稳定频率过于保守，而瞬态分析方法在理论上可以得到较为真实的不稳定频率。考虑制动闸片与制动盘接触点间的摩擦力耦合作用，基于建立的高速动车轮盘制动系统的有限元模型，采用瞬态分析法对高速动车轮盘制动系统进行摩擦自激振动分析，并与复特征值分析法得到结果的进行比较。结果表明，接触面间法向接触力的振动主频与闸片法向振动的主频一致；制动系统瞬态动力学分析得到的振动主频与其复特征值分析得到的不稳定频率基本相符。
재제동조성적유한원분석방법중，복특정치방법예측득도적불은정빈솔과우보수，이순태분석방법재이론상가이득도교위진실적불은정빈솔。고필제동갑편여제동반접촉점간적마찰력우합작용，기우건립적고속동차륜반제동계통적유한원모형，채용순태분석법대고속동차륜반제동계통진행마찰자격진동분석，병여복특정치분석법득도결과적진행비교。결과표명，접촉면간법향접촉력적진동주빈여갑편법향진동적주빈일치；제동계통순태동역학분석득도적진동주빈여기복특정치분석득도적불은정빈솔기본상부。
There are two analysis methodologies available for predicting brake squeal using the finite element method, namely,complex eigenvalue analysis method and dynamic transient analysis method. Not all the unstable frequency ob-tained using complex eigenvalue analysis method can be observed in experiments,while transient analysis method is able to predict real unstable frequency in theory. A transient dynamic model of a wheel-disc brake system of EMU was estab-lished to study friction-induced self-excited vibration of the brake system,in which the friction coupling between brake pads and disc was imposed. Results show that the value of the dominant vibration frequency of the contact force between the brake pad and disc is consistent with that of the normal vibration of the brake pad. The dominant vibration frequency obtained by the transient analysis method is very close to the value of the unstable frequency obtained by the complex ei-genvalue method.