某车型中高速工况热制动车身抖动分析与控制  

Analysis and Control of the Vehicle’s Brake Judder under Medium and High Speed Hot Braking Condition

作　　者：岳川元 张军 杨朝 沈蜜 万鑫[1,2] 杨诚 YUE Chuanyuan;ZHANG Jun;YANG Zhao;SHEN Mi;WAN Xin;YANG Cheng(School of Automotive Engineering,Chongqing University,Chongqing 400044,China;Chongqing Chang’an Auto Oushang R&D Center,Chongqing 400023,China;Geely Automobile Research Institute,Hangzhou 310000,China)

机构地区：[1]重庆大学汽车工程学院,重庆400044 [2]重庆长安汽车股份有限公司欧尚研究院,重庆400023 [3]吉利汽车研究院,杭州310000

出　　处：《噪声与振动控制》2019年第5期96-101,共6页Noise and Vibration Control

摘　　要：某前驱车型在高速、热车工况进行中度制动时出现方向盘摆振及车身抖动问题。经制动抖动整车道路试 验与整车悬架系统、方向盘模态测试分析,最终确定是由于制动盘热变形导致制动盘厚薄差(DTV)增长,引起的激励 频率与悬架系统纵向固有频率、方向盘旋转模态频率相重合产生共振。通过更改制动盘通风结构增加冷却效能,以及 调整悬架系统刚度特性改变纵向固有频率的方法有效解决了该车型制动抖动问题。The steering wheel shimmy and body judder arise in the condition of medium and high speed hot braking process.During the braking process,the increase of the thermal deformation of the brake disc leads to the growth of the DTV of the brake disc and the vibration excitation is generated and transmitted to the body and the steering wheel.After investigation and analysis,it is determined that the judder is caused by the overlap resonance between the excitation frequency caused by the brake disc DTV and the natural frequencies of the suspension system and the steer wheel.By changing the ventilation structure of the brake disc to increase the cooling efficiency and adjust the stiffness of the suspension system to change its natural frequency,the brake judder problem of the vehicle is effectively solved.

关 键 词：振动与波 制动抖动 悬架系统 转向系统 模态分析 DTV 

分 类 号：TH12[机械工程—机械设计及理论]