School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China.
Environ Sci Pollut Res Int. 2021 Jun;28(23):29467-29483. doi: 10.1007/s11356-021-12417-8. Epub 2021 Feb 9.
The aerodynamic noise around the high-speed railway bridge is studied by the train-bridge-flow field numerical model and theory analysis. With the background of the Beijing-Shanghai high-speed railway line in China, based on the broadband noise sources method and acoustic analogy theory, both the intensity characteristics of near-field aerodynamic noise sources of the train and the spatial distribution characteristics of far-field aerodynamic noise around the bridge are analyzed. The results show that there is the largest sound source energy on the nose tip of the high-speed train; the fluctuating pressure between air and train surface contributes the most to aerodynamic noise; along the longitudinal direction of the bridge, the aerodynamic noise energy near the junction of train tail and body is the strongest; along the transverse direction of the bridge, the aerodynamic noise energy decreases gradually with the distance from the centerline of the railway; along the vertical direction, the aerodynamic noise energy is the strongest at a location of 1.2 m above the top surface of the rail; the train speed, train type, and the height variation of the bridge pier can affect the distribution of far-field aerodynamic noise.
通过列车-桥梁流场数值模型和理论分析研究了高速铁路桥梁周围的空气动力噪声。以中国京沪高速铁路线路为背景，基于宽带噪声源方法和声类比理论，分析了列车近场空气动力噪声源的强度特性和桥梁周围远场空气动力噪声的空间分布特性。结果表明，高速列车头部有最大的声源能量；列车表面的气流脉动压力对空气动力噪声的贡献最大；沿桥梁的纵向，列车尾部与车身连接处附近的空气动力噪声能量最强；沿桥梁的横向，空气动力噪声能量随距铁路中心线距离的增加而逐渐减小；沿垂直方向，轨顶以上 1.2m 处的空气动力噪声能量最强；列车速度、列车类型和桥墩高度变化都会影响远场空气动力噪声的分布。
