某乘用车加速车内轰鸣声的测试诊断与降噪整改  

TEST DIAGNOSIS AND NOISE REDUCTION RECTIFICATION OF ACCELERATING VEHICLE INTERIOR BOOMING NOISE OF A PASSENGER CAR

作　　者：刘钢[1] 王圣波 臧泽楠 杨依 LIU Gang;WANG ShengBo;ZANG ZeNan;YANG Yi(Project Dept.,FAW Haima Automobile Co.,Ltd.,Haikou 570216,China;The Department of Industry and Information Engineering,Vocational Technology College of Hainan,Haikou 570216,China)

机构地区：[1]一汽海马汽车有限公司项目部,海口570216 [2]海南职业技术学院工业与信息学院,海口570216

出　　处：《机械强度》2021年第6期1479-1484,共6页Journal of Mechanical Strength

基　　金：国家科技支撑计划项目(2013BAG07B00);海南省自然科学基金项目(121MS059);海南省高等学校教育教学改革研究项目(Hnjg2017ZD-23)资助。

摘　　要：基于轰鸣声的产生机理和传递路径,阐述了不同路径轰鸣声相应的控制策略。针对某乘用车的加速车内轰鸣声问题,介绍了基于传递路径对轰鸣声进行诊断时,不同路径相应的排查方法;并在确定该问题来自进气系统的结构传递路径后,进一步分析出:中冷器支架处有对应频率的模态,所以发动机激励在此处被放大,并与车身声腔模态耦合,最终形成了车内的轰鸣声;进而明确对中冷器安装支架结构和中冷器隔振进行优化的方案,提高中冷器支架模态,提升隔振效果,减小能量传递,消除模态耦合,使问题得以解决,对乘用车的轰鸣声控制有一定参考价值。Based on the generation mechanism and transmission path of the roar, this paper expounds the corresponding control strategies for the roar of different paths. Aiming at the roaring noise in the accelerating car of a passenger car, the corresponding troubleshooting methods for different paths when the roaring sound is diagnosed based on the transmission path are introduced;and after determining that the problem comes from the structural transmission path of the intake system, further analysis: There is a mode with a corresponding frequency at the intercooler bracket, so the engine excitation is amplified here, and coupled with the body acoustic cavity mode, and finally forms the roar of the car;furthermore, it is clear that the intercooler installation bracket structure and the The optimized plan for cooling vibration isolation is to improve the mode of the intercooler support, improve the vibration isolation effect, reduce energy transfer, eliminate modal coupling, and solve the problem. This article has certain reference value for the roar control of passenger cars.

关 键 词：乘用车 轰鸣声 路径分析 结构传递 模态耦合 测试诊断 

分 类 号：TH122[机械工程—机械设计及理论] U467.493[机械工程—车辆工程]