制动盘弹性模量对制动尖叫影响的仿真分析  

Computational Analysis of Impact of Rotor Elastic Modulus on Disc Brake Squeal

作　　者：张立军[1,2] 唐传骏[1,2] 庞明[1,2] 孟德健[1,2] 余卓平[1,2] 

机构地区：[1]同济大学 新能源汽车工程中心,上海201804 [2]同济大学 汽车学院,上海201804

出　　处：《汽车工程学报》2013年第5期313-323,共11页Chinese Journal of Automotive Engineering

基　　金：国家自然科学基金(51175380);中央高校基本科研业务费专项资金

摘　　要：制动盘的弹性模量对制动尖叫具有重要影响。建立制动盘的有限元模型,分析弹性模量对自由模态和约束模态的影响,进而建立制动器的复模态有限元模型,分析弹性模量对不稳定模态频率的影响,同时从模态振型的角度探索弹性模量对模态耦合特性的影响,揭示弹性模量影响制动尖叫的规律。研究发现,弹性模量变化不改变自由和约束模态振型,但模态频率的平方与弹性模量呈正比例关系;不稳定模态频率-弹性模量曲线与约束模态频率-弹性模量曲线的吻合程度体现了制动盘对不稳定模态耦合的影响程度不同,需要根据不同的不稳定模态具体分析弹性模量的影响,以指导材料选型。The elastic modulus of brake disc has great influence on brake squeal. In this paper, a finite element model of a ventilated brake rotor was established to analyze the effect of elastic modulus on the free and constrained modal characteristics. And then a model with complex eigenvalues was established based on finite element method to study the impact of elastic modulus on the squeal. It was found that the variation of the disc elastic modulus has no change on either the fi＇ee or the constrained mode shapes. However, the square of the corresponding modal frequency is directly proportional to the elastic modulus. The difference between the instable frequency-elastic modulus curve and the constrained frequency-elastic modulus shows the different influence of rotor characteristics on the instable modal coupling. The effect of disc elastic modulus on each instable squeal mode must be carefully analyzed to aid the disc material selection.

关 键 词：制动尖叫 制动盘 弹性模量 结构模态 模态耦合 

分 类 号：U463.51[机械工程—车辆工程]