A Study on Source Mechanism in the Interior Noise Problem of High Speed Trains

Koh, Hun Yeong; Kwon, Hyeok Bin; You, Won-Hee; Park, J. H.

doi:10.1007/978-3-540-74893-9_31

Cited by 3 publications

(1 citation statement)

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“…The inter-coach gap is also a source of high interior noise levels, particularly at frequencies below about 100 Hz, associated with an acoustic resonance of the cavity [116]. The size of the baffles at either side of the gap can be optimised to close the cavity [10].…”

Section: Other Sources 81 Inter-coach Gapmentioning

confidence: 99%

Recent developments in the prediction and control of aerodynamic noise from high-speed trains

Thompson

Iglesias

Liu

et al. 2015

International Journal of Rail Transportation

128

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At speeds above 300-350 km/h, the main source of noise from trains is the aerodynamic noise caused by the air flow over the train structure. The sound level increases with train speed at a rate of between 60 and 80 times the logarithm of the speed so that, as speeds increase further, the noise increases dramatically. The main aerodynamic noise is produced by the air flow passing over the pantograph, the train nose, the bogie region and cavities such as the pantograph recess and the inter-coach gap. Experimental and numerical methods for studying aerodynamic noise are reviewed including the use of microphone arrays, wind tunnels, computational fluid dynamics and semi-empirical methods. Potential mitigation measures that can control aerodynamic noise are also reviewed.

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Section: Other Sources 81 Inter-coach Gapmentioning

confidence: 99%