| On aerodynamic noises radiated by the pantograph system of high-speed trains | |
Yu HH(喻华华) ; Li JC(李家春); Zhang HQ(张会琴); Li, JC (reprint author), Chinese Acad Sci, Inst Mech, LMFS, Beijing 100190, Peoples R China.
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| Source Publication | Acta Mechanica Sinica
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| 2013 | |
| Volume | 29Issue:3Pages:399-410 |
| ISSN | 0567-7718 |
| Abstract | Pantograph system of high-speed trains become significant source of aerodynamic noise when travelling speed exceeds 300 km/h. In this paper, a hybrid method of non-linear acoustic solver (NLAS) and Ffowcs Williams–Hawkings (FW–H) acoustic analogy is used to predict the aerodynamic noise of pantograph system in this speed range. When the simulation method is validated by a benchmark problem of flows around a cylinder of finite span, we calculate the near flow field and far acoustic field surrounding the pantograph system. And then, the frequency spectra and acoustic attenuation with distance are analyzed, showing that the pantograph system noise is a typical broadband one with most acoustic power restricted in the medium-high frequency range from 200 Hz to 5 kHz. The aerodynamic noise of pantograph systems radiates outwards in the form of spherical waves in the far field. Analysis of the overall sound pressure level (OASPL) at different speeds exhibits that the acoustic power grows approximately as the 4th power of train speed. The comparison of noise reduction effects for four types of pantograph covers demonstrates that only case 1 can lessen the total noise by about 3 dB as baffles on both sides can shield sound wave in the spanwise direction. The covers produce additional aerodynamic noise themselves in the other three cases and lead to the rise of OASPLs. |
| Keyword | Aerodynamic Noise Nlas Fw–h Acoustic Analogy Pantograph System High-speed Train |
| Subject Area | 流动噪声与控制 |
| URL | 查看原文 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000323736400011 |
| Funding Organization | The project was supported by the National Key Technology R&D Program (2009BAG12A03) and the Knowledge Innovation Project of Chinese Academy of Sciences of China (KJCX2-EW-L02-1). |
| Department | LMFS水环境流体力学(LEM) |
| Classification | 二类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47363 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Li, JC (reprint author), Chinese Acad Sci, Inst Mech, LMFS, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Yu HH,Li JC,Zhang HQ,et al. On aerodynamic noises radiated by the pantograph system of high-speed trains[J]. Acta Mechanica Sinica,2013,29,3,:399-410. |
| APA | Yu HH,Li JC,Zhang HQ,&Li, JC .(2013).On aerodynamic noises radiated by the pantograph system of high-speed trains.Acta Mechanica Sinica,29(3),399-410. |
| MLA | Yu HH,et al."On aerodynamic noises radiated by the pantograph system of high-speed trains".Acta Mechanica Sinica 29.3(2013):399-410. |
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