某电动车型空调箱NVH性能分析与优化

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中图分类号：U463.851 文献标识码：A 文章编号：1003-8639（2026）02-0119-04

Analysis and Optimization of NVH Performance of an Electric Vehicle's Air Conditioning Box

LiuHui，WangHao

（Xiezhong International Thermal Management System （Jiangsu） Co.，Ltd.，Nanjing 2111Oo，China）

【Abstract】A low-frequency noise problem occurred during operation of an electric vehicle air conditioning box. It was determinedthatthis noise belonged tothe frequencyrangeof 8OHz to16OHz by experiments.Noise sources were investigatedforthis dangerous frequency band.Through local modal tests and simulation analysis，thecompressed air surface of theair conditioning box wasa structurallweak area，and this structure was optimized.Finally，simulation verification and experimental verification were caried outonthe optimized structure.Theresults show that the noise peak inthe dangerous frequency band has disappeared.Optimizing the structural strength of the compressed air surface contribues 3dB tonoisereduction，providing efectiveexperience fortheforwarddevelopmentof NVHperformanceof the air conditioning box.

【Key words】NVH;air conditioning box;local modal；noise test；simulation analysis；performance optimization

0 引言

随着工业技术革新与消费需求升级，现代交通工具的声振品质已成为衡量产品性能的指标之一。（剩余4087字）