Acoustic optimization design for the laying schemes on the composite roof structure of high-speed train

Leixin Huang, Xinbiao Xiao, Qi Wang, Ruiqian Wang, Jie Zhang and Yang Liu

International Journal of Rail Transportation, 2025, vol. 13, issue 5, 968-987

Abstract: If the weak sound insulation in the roof during high-speed train travel through tunnels can be addressed by adjusting the order of materials, this will meet design requirements for both economy and lightweight construction. This paper studies this problem. First, a prediction model for sound transmission loss (STL) of the roof was established to investigate the impact of different material placement schemes and optimize their arrangement. Then, the optimal placement schemes between the roof and floor were compared using STL tests. Finally, this study also examined how an optimal scheme mitigates power radiation from the roof into the train interior under typical mechanical excitations. The results indicate that the optimal laying scheme for the roof differs from that of the floor. By placing sound absorption materials on the inner side of aluminium extrusion and sound insulation materials on decorative plate, it effectively enhances vibro-acoustic characteristics of the roof.

Date: 2025
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DOI: 10.1080/23248378.2024.2400161

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International Journal of Rail Transportation is currently edited by Wanming Zhai and Kelvin C. P. Wang

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