IMECH-IR  > 流固耦合系统力学重点实验室
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.
Source PublicationActa Mechanica Sinica
2013
Volume29Issue:3Pages:399-410
ISSN0567-7718
AbstractPantograph 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.
KeywordAerodynamic Noise Nlas Fw–h Acoustic Analogy Pantograph System High-speed Train
Subject Area流动噪声与控制
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Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000323736400011
Funding OrganizationThe 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).
DepartmentLMFS水环境流体力学(LEM)
Classification二类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47363
Collection流固耦合系统力学重点实验室
Corresponding AuthorLi, 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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