Abstract: Based on modeling and complex modal analysis, the concept of brake pressure distribution is put forward to solve the problem of howling in automobile disc brake. When the pressure distribution of the friction plate is large, the total deformation of the friction plate is the largest, and the probability of noise is greater. Based on the results of the noise, vibration and harshness (NVH) of SAE-J-2521 bench, a method for predicting brake pressure distribution is obtained through case study. Due to the uneven pressure distribution, the pressure distribution can be improved by reducing the area of the friction plate screw-in end, so as to improve the performance of brake noise. Through case analysis, the single parallel "J" chamfer scheme is added to optimize the pressure distribution of the friction plate and improve the performance of brake noise.

Key words: Pressure distribution; Single chamfer; Screw in side; Brake squeal

摘要： 针对汽车盘式制动啸叫的问题，提出了制动压力分布的概念，基于建模和复模态分析， 得出制压力分布均匀时，其摩擦片的总变形量最小，噪声发生的概率最小。而摩擦片旋入端 的压力分布大时，其摩擦片的总变形量最大，噪声发生的概率越大。通过案例分析，基于 SAE-J-2521 的噪声、振动与声振粗糙度（NVH）台架结果，得出预测制动压力分布的方法。 由于压力分布不均匀的原因，可以使用减小摩擦片旋入端的面积来改善压力分布，从而提升 制动噪声表现，通过案例分析，增加单平行“J”倒角方案，优化摩擦片的压力分布，提升制 动噪声的表现。

关键词: 压力分布；单倒角；旋入侧；制动啸叫