某电力机车司机室异常噪声测试分析及解决方案  

Test Analysis and Solution of Abnormal Noise in Driver's Cab of an Electric Locomotive

作　　者：唐雨舟 陈哲 刘晓波 TANG Yuzhou;CHEN Zhe;LIU Xiaobo

机构地区：[1]中车株洲电力机车有限公司,湖南株洲412001

出　　处：《铁道技术监督》2024年第1期39-41,47,共4页Railway Quality Control

摘　　要：为查找某电力机车司机室异常噪声的产生原因,开展溯源分析。通过测试司机室异常噪声频率、分析噪声频率分布,推断异常噪声来自于司机室顶盖蒙皮。通过振动试验和声学模态测试,以及司机室头型流场分析,推测司机室异常噪声形成机理。研究结果表明,司机室内出现异常噪声时,内装板振动加速度在频率为225 Hz附近存在明显峰值,并且与顶盖蒙皮密切相关。在频率为225 Hz附近,司机室蒙皮、内装板与司机室声腔存在耦合共振响应,最终在司机室形成异常噪声。通过在司机室顶盖蒙皮下方增加加强筋板,消除了218 Hz~232 Hz异常振动频率,司机室再未出现异常噪声现象。In order to find out the causes of abnormal noise in the driver's cab of an electric locomotive,traceability analysis is carried out.By testing frequency of the abnormal noise in driver's cab and analyzing frequency distribu⁃tion,it is inferred that the abnormal noise comes from the top cover skin of driver's cab.Through vibration tests,acoustic modal tests and analysis of the flow field in the head of the driver's compartment,the formation mechanism of the abnormal noise in the driver's cab is hypothesized.The results show that when abnormal noise occurs in the driver's cab,the vibration acceleration of the interior panel has obvious peak value when the frequency is around 225 Hz,which is closely related to the top cover skin.When the frequency is around 225 Hz,the top cover skin of the driver's cab,interior panel and acoustic cavity in the driver's cab have coupling resonance response,and finally abnormal noise is formed in driver's cab.By adding stiffeners under the top cover of driver's cab,the abnormal vibration frequency from 218 Hz to 232 Hz was eliminated,and the abnormal noise phenomenon in driver's cab do not appear again.

关 键 词：电力机车 司机室 噪声 模态 流场 

分 类 号：U264.016[机械工程—车辆工程] U264.038[交通运输工程—载运工具运用工程]