低频制动啸叫2.7 kHz的噪声分析  

Noise Analysis for Low Frequency Brake Squeal at 2.7 kHz

作　　者：谢桃新 王迟 董冠龙 XIE Taoxin;WANG Chi;DONG Guanlong(Ford Motor Research&Engineering(Nanjing)Co.,Ltd.,Nanjing Jiangsu 211100,China)

机构地区：[1]福特汽车工程研究(南京)有限公司,江苏南京211100

出　　处：《汽车零部件》2023年第2期38-42,共5页Automobile Parts

摘　　要：针对制动噪声验收试验中出现的2.7 kHz低频制动啸叫进行了分析,通过对比制动卡钳与制动盘的固有频率在2.7 kHz处的分析结果,发现其两者在2.7 kHz处的频率差值约64 Hz时容易出现共振现象,进一步通过CAE分析了几种改变制动盘的固有频率的方案。结果表明:增加通风槽的V型结构与减少制动盘的厚度会使制动盘的固有频率减小,而减小制动盘的碳当量和增加制动盘的厚度会使制动盘的固有频率增加;制动盘的固有频率的减小会改善2.7 kHz的低频制动啸叫。最后基于增加通风槽的V型结构方案通过整车黄龙制动噪声试验验证。The 2.7 kHz low frequency brake squeal occurred during the brake noise sign-off test was analyzed.By comparing the analysis results of the natural frequencies of the brake caliper and the brake at 2.7 kHz, it was found that the resonance phenomenon was easy to occur when the frequency variation at 2.7 kHz is about 64 Hz.Further, several schemes to change the natural frequencies of the brake were analyzed by CAE.The results show that the natural frequency of the brake can be shifted down by increasing the V-shaped structure of the ventilation slot and reducing the brake thickness, while the natural frequency of the brake can be shifted up by decreasing the carbon equivalent of the brake and increasing the brake thickness.Reducing the natural frequency of the brake can be helpful for the 2.7 kHz low frequency brake squeal.Finally, the V-shaped structure scheme based on the addition of ventilation slot was verified by the vehicle Huanglong brake noise test.

关 键 词：低频制动啸叫 V型通风槽 固有频率 制动盘碳当量 

分 类 号：U467.493[机械工程—车辆工程]