摘要
某电动车型空调箱在运转过程中出现低频轰鸣噪声问题,经试验确定该噪声集中在80~160Hz频率段。文章针对此危险频率段开展噪声源排查,通过局部模态试验与仿真分析,明确空调箱压风面为结构薄弱区域。对该区域进行结构优化后,分别开展仿真验证与试验验证。结果表明,危险频率段的噪声尖峰已完全消失,优化压风面结构强度对降噪的贡献量达3dB,为后续空调箱噪声、振动与声振粗糙度(Noise,Vibration and Harshness,NVH)性能正向开发提供有效技术参考。
A low-frequency noise problem occurred during operation of an electric vehicle air conditioning box.It was determined that this noise belonged to the frequency range of 80Hz to 160Hz by experiments.Noise sources were investigated for this dangerous frequency band.Through local modal tests and simulation analysis,the compressed air surface of the air conditioning box was a structurally weak area,and this structure was optimized.Finally,simulation verification and experimental verification were carried out on the optimized structure.The results show that the noise peak in the dangerous frequency band has disappeared.Optimizing the structural strength of the compressed air surface contributes 3dB to noise reduction,providing effective experience for the forward development of NVH performance of the air conditioning box.
作者
刘会
王浩
Liu Hui;Wang Hao(Xiezhong International Thermal Management System(Jiangsu)Co.,Ltd.,Nanjing 211100,China)
出处
《汽车电器》
2026年第2期119-122,共4页
Auto Electric Parts
关键词
NVH
空调箱
局部模态
噪声测试
仿真分析
性能优化
NVH
air conditioning box
local modal
noise test
simulation analysis
performance optimization
