某微型车盘式制动器制动噪声分析

Analysis of a Minicar Disc Brake Noise

以制动器制动噪声产生机理为基础,针对某微型车制动过程中的噪声问题,使用有限元软件建立制动盘、制动块以及制动钳支架的模型,对零部件和制动器总成进行实模态和复模态分析。结合噪声试验判定制动器系统与制动噪声相关的不稳定模态,预测可能的噪声频率,找到各部件对制动噪声影响最大的几阶模态,进行结构优化。研究结果表明:通过对制动器系统的实模态和复模态分析,可以预测噪声发生时的频率、不稳定模态以及制动器部件的振动状态,通过结构参数优化可以实现降噪目的。

According to a minicar disc brake noise problem,this paper established the finite element model of the disc brake including the brake disc,brake pad and brake caliper bracket. Based on the brake noise generation mechanism,the real modal and complex modal analysis were carried out. According to the noise test the unstable modes relative to brake noise were determined,the noise frequency was predicted. The modes of components relative to noise were found out. Finally,the structure optimization was carried out. The results indicate that the frequency of brake noise,unstable modes and vibration state can be predicted through the real and complex modal analysis. It is a great help for reducing brake noise and structural optimization.