纯电动汽车车身泄压阀引起的低频涡声耦合问题识别分析
Analysis and identification of low frequency vortex-acoustic coupling problem caused by decompression air vent of electric vehicle
沈龙 1张军 2黄应来 2李欣 1宋琼1
作者信息
- 1. 浙江智马达智能科技有限公司 宁波 315336
- 2. 吉利汽车研究院宁波有限公司 宁波 315336
- 折叠
摘要
由于纯电动汽车底部平整,高速行驶时可能容易诱发气流与车身泄压阀耦合,从而引起车内低频噪声问题,严重降低乘坐舒适性.以某纯电动汽车高速行驶低频涡声耦合问题的测试排查分析过程为例,系统地介绍了低频涡声耦合问题的发生机理,设计了一种用于验证低频噪声问题的静置试验方法,识别出影响低频噪声的关键要素,并设计了泄压阀罩工程化方案,实车验证了方案的有效性,这对于解决纯电动汽车低频涡声耦合问题和前期开发问题识别具有借鉴和参考价值.
Abstract
Due to the flat bottom of electric vehicle(EV),it is easy to stimulate low-frequency sound at high speed,which seriously reduces ride comfort.In this paper,a EV decompression air vent low-frequency vortex-acoustic coupling problem at high speed is taken as the research object.The mechanism of low frequency vortex-acoustic coupling problem is systematically introduced.A static test method is designed to verify the low frequency noise problem,and the key factors affecting the low frequency noise are identified.The effectiveness of the scheme is verified by the vehicle subjective evaluation and objective test.This paper has important engineering guiding significance for solving the low-frequency sound problem.
关键词
泄压阀/空腔/涡/自激振荡/耦合Key words
Decompression air vent/Cavity/Vortex/Self-sustained oscillation/Coupling引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据