Sound transmission loss of windows on high speed trains

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Zhang, Yumei^1,2 ; Xiao, Xinbiao^1 ; Thompson, David^2 ; Squicciarini, Giacomo^2 ; Wen, Zefeng^1 ; Li, Zhihui^1 ; Wu, Yue^1

State Key Laboratory of Traction Power, Southwest Jiaotong University, China^1

Institute of Sound and Vibration Research, University of Southampton, United Kingdom^2

关键词: Car body structures;    High speed train (HST);    Low-noise designs;    Modal superposition method;    Sound transmission loss;    Spectral shapes;    Transmission paths;    Vibration velocity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012141/pdf
DOI  :  10.1088/1742-6596/744/1/012141

来源: IOP

【 摘 要 】

The window is one of the main components of the high speed train car body structure through which noise can be transmitted. To study the windows' acoustic properties, the vibration of one window of a high speed train has been measured for a running speed of 250 km/h. The corresponding interior noise and the noise in the wheel-rail area have been measured simultaneously. The experimental results show that the window vibration velocity has a similar spectral shape to the interior noise. Interior noise source identification further indicates that the window makes a contribution to the interior noise. Improvement of the window's Sound Transmission Loss (STL) can reduce the interior noise from this transmission path. An STL model of the window is built based on wave propagation and modal superposition methods. From the theoretical results, the window's STL property is studied and several factors affecting it are investigated, which provide indications for future low noise design of high speed train windows.