Sound Source Localisation for a High-Speed Train and Its Transfer Path to Interior Noise

Jie Zhang,Zhihui Li,Xinbiao Xiao,Xiaozhen Sheng

doi:10.1186/s10033-019-0375-1

Jie Zhang, Zhihui Li + Show 2 more

Open Access

https://doi.org/10.1186/s10033-019-0375-1

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Abstract

Noise is one of the key issues in the operation of high-speed railways, with sound source localisation and its transfer path as the two major aspects. This study investigates both the exterior and interior sound source distribution of a high-speed train and presents a method for performing the contribution analysis of airborne sound with regard to the interior noise. First, both exterior and interior sound source locations of the high-speed train are identified through in-situ measurements. Second, the sound source contribution for different regions of the train and the relationships between the exterior and interior noises are analysed. Third, a method for conducting the contribution analysis of airborne sound with regard to the interior noise of the high-speed train is described. Lastly, a case study on the sidewall area is carried out, and the contribution of airborne sound to the interior noise of this area is obtained. The results show that, when the high-speed train runs at 310 km/h, dominant exterior sound sources are located in the bogie and pantograph regions, while main interior sound sources are located at the sidewall and roof. The interior noise, the bogie area noise and the sound source at the middle of the coach exhibit very similar rates of increase with increasing train speed. For the selected sidewall area, structure-borne sound dominates in most of the 1/3 octave bands.

Highlights

In recent years, China’s high-speed railway has developed rapidly
They found that the use of the moving irregularity model without considering wheel/track parametric excitation may lead to underestimation of the noise level
For high-speed trains, there is still a lack of joint analysis of interior sources and exterior sources, especially the quantitative analysis of the transfer contribution from the exterior to the interior, which is precisely the key to control the interior noise. This study investigates both exterior and interior sound source distributions of a high-speed train and presents a method for contribution analysis of airborne sound to the interior noise

Summary

Introduction

Noise is one of the key issues for operating high-speed railways [1,2,3,4,5], with sound source localisation and its transfer path as the two main aspects. The major noise sources for a high-speed train are wheel/rail rolling noise and pantograph aerodynamic noise [6, 7]. Remington [8] and Thompson [9] conducted comprehensive research on mechanism of generation and ways to predict the wheel/rail noise. Wu et al [10] studied the rolling noise generated by wheel/track parametric excitation. They found that the use of the moving irregularity model without considering wheel/track parametric excitation may lead to underestimation of the noise level

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Conclusion