罐车运行过程中诱导振动引起的结构噪声排放

IF 1.9 Q3 ENGINEERING, MECHANICAL
Vibration Pub Date : 2022-09-14 DOI:10.3390/vibration5030037
J. Ďungel, J. Grenčík, P. Zvolenský
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引用次数: 1

摘要

铁路运输在能源消耗和空气污染方面被认为是相对环保的,但在噪音污染方面则相对不友好。传播到铁路周边地区的噪声和振动对居民造成了干扰。为了尽量减少这种噪音,已经通过了诸如TSI NOI之类的立法和法规,并对铁路运输产生的噪音和振动进行了研究。我们的团队也进行了这样的研究,重点是对铁路货车产生的噪音进行实验调查,在这个特殊的情况下,是对油罐车。我们使用有限元模型模拟了转向架和油箱的结构特征频率,以找到这些振动产生的振动和相应的噪声水平。将理论结果与冲击锤噪声测量结果和数字声相机噪声场可视化结果进行了比较。通过仿真和实测,确定了基本噪声源的主频率噪声域:滚动(40 ~ 63 Hz)、坦克(200 ~ 1000 Hz)、转向架(400 ~ 1600 Hz)和车轮(800 ~ 10000 Hz)。在实际运行条件下,以两种列车速度对铁路线进行了测量,以了解实际的外部噪声水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Emission of Structural Noise of Tank Wagons Due to Induced Vibrations during Wagon Operation
Railway transport is considered relatively environmentally friendly in terms of energy consumption and air pollution, but it is relatively unfriendly in terms of noise pollution. Noise and vibrations propagating to railroad surrounding areas are disturbing populations. In order to minimize this noise, legislation and regulations such as TSI NOI have been adopted and research of noise and vibrations generated by railway transport has been carried out. Such research has been carried out also by our team focused on experimental investigation of noise generated by railway wagons, in this particular case on tank wagons. We simulated the structural eigenfrequencies of both bogies and tanks using FEM models to find vibrations and corresponding noise levels generated by these vibrations. Theoretical results have been compared with results of measurements of noise generated by impact hammer and visualization of noise fields using a digital acoustic camera Soundcam. Based on the simulation and measurements, principal frequency noise domains of fundamental noise sources were determined—rolling (40–63 Hz), tank (200–1000 Hz), bogie (400–1600 Hz), and wheel (800–10,000 Hz). Measurements on the railway line under real operational conditions at two train speeds have been carried out, too, to see the actual external noise levels.
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CiteScore
3.20
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