文章摘要
陈江艳,杨兴国,杨诚.电动汽车拍振问题分析及改进[J].声学技术,2023,42(3):338~345
电动汽车拍振问题分析及改进
Analysis and optimization of beat vibration for an electric vehicle
投稿时间:2022-01-12  修订日期:2022-01-26
DOI:10.16300/j.cnki.1000-3630.2023.03.011
中文关键词: 电动汽车  压缩机  空调系统  拍振  传递路径
英文关键词: electric vehicle  compressor  air-conditioning system  beat vibration  transmission path
基金项目:重庆市教委科学技术研究资助项目(KJQN202004005)。
作者单位E-mail
陈江艳 重庆超力电器有限责任公司, 重庆 401122
重庆大学机械与运载工程学院, 重庆 400030 
 
杨兴国 重庆工商职业学院, 重庆 401520 790146442@qq.com 
杨诚 重庆大学机械与运载工程学院, 重庆 400030  
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中文摘要:
      某电动汽车的空调系统存在间歇性异常振动噪声,严重影响驾乘舒适性。文章首先采用分别运行法快速锁定了压缩机和冷却风扇为故障相关零部件,并基于零部件结构特征分析、拍振理论分析、时域数据分析和频谱分析确认该故障为拍振;然后通过传递路径分析及试验确认了该拍振故障的作用机理;最后针对压缩机和冷却风扇两个关键零部件,分别基于源、路径两个方面提出了多种改善措施并通过单品及整车验证确认了改善方案的有效性。分析结果表明,降低振源激励、提升传递路径隔振能力可有效处置拍振问题,车内噪声降低可达8.1 dB (A),降幅约为13.94%。
英文摘要:
      Intermittent abnormal vibration and noise is generated in the air conditioning system of an electric vehicle, which seriously affects the driving comfort. Firstly, the fault parts are identified as compressor and cooling fan by the separate operation method. The fault is confirmed to be the beat vibration by the structural analysis of parts, the theoretical analysis of beat vibration and the analyses of time domain data and spectrum. Then, the mechanism of the beat vibration is confirmed by transmission path analysis and test. Finally, for the two key components of compressor and cooling fan, a variety of improvement measures are proposed in terms of source and transmission path, and the effectiveness is verified by the parts and vehicle tests. The results show that the beat vibration can be effectively eliminated by reducing the excitation of vibration source and improving the vibration isolation of transmission path, and the vehicle interior noise can be reduced by 8.1 dB(A), the reduction ratio is about 13.94%.
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