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某电力机车司机室异常噪声测试分析及解决方案

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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.

Electric LocomotiveDriver's CabNoiseModeFlow Field

唐雨舟、陈哲、刘晓波

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中车株洲电力机车有限公司,湖南 株洲 412001

电力机车 司机室 噪声 模态 流场

2024

铁道技术监督
铁道科学研究院

铁道技术监督

影响因子:0.244
ISSN:1006-9178
年,卷(期):2024.52(1)
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