基于传递路径的电动汽车车内噪声贡献量分析  

Testing and Analysis of Interior Noise about Electric Vehicles Based on Transfer Path

作　　者：赖诗洋 Lai Shiyang

机构地区：[1]重庆工程职业技术学院智能制造与交通学院,重庆402260

出　　处：《时代汽车》2024年第24期107-111,共5页Auto Time

基　　金：重庆市教委科学技术研究项目(KJQN202103412);重庆工程职业技术学院科研课题(2024KJB01022)。

摘　　要：传递路径分析是汽车领域常用的声振测试分析方法,为识别某电动汽车车内噪声来源,区分各噪声激励对车内噪声的影响程度,基于工况传递路径分析方法,以驾驶员耳旁声压信号为响应,以路面噪声、风噪、电机噪声为激励,建立该车车内噪声贡献量分析模型,进行0至100km/h加速工况下的贡献量分析,并针对某一峰值声压处的贡献量做具体分析。结果表明,左前轮胎的结构路径对加速工况下车内噪声的贡献量最大,其输入显著大于其他路径,后续分析可据此对结构进行相应的优化改进。Transmission Path Analysis(TPA)is a commonly used acoustic and vibration testing and analysis method in the automotive industry.To identify the sources of interior noise in an electric vehicle and diff erentiate the infl uence of various noise sources on the interior noise,an operational transfer path analysis(OTPA)method was employed.Acoustic signal at the driver's ear was treated as the response.Road noise,wind noise,and motor noise were considered as excitations.A contribution analysis model for the interior noise of the electric vehicle was established and analyzed under 0-100km/h acceleration conditions.Specifi c analysis was conducted for the contributions at the peak sound pressure levels.The results indicated that the structural path from the left front tire contributes the most to the interior noise during acceleration,with a signifi cantly higher input than other paths.Subsequent analyses can be based on these fi ndings to optimize and improve the structure accordingly.

关 键 词：工况传递路径分析 贡献量分析 路噪 传递函数 

分 类 号：U46[机械工程—车辆工程]