轨道交通桥梁减振降噪2020年度研究进展

随着高速铁路与城市轨道交通的快速发展,振动与噪声问题愈发突出。传统直立式声屏障对轮轨噪声降噪效果明显,当列车运行速度超过250 km/h时,其降噪量不足,为此,我国高速铁路正力推全封闭声屏障的建设。同时,随着钢桥或钢混组合桥在我国高速铁路和城市轨道交通中逐步得到广泛应用,钢桥或钢混组合桥的声辐射能力更强,具有频谱宽、幅值大和难控制等特点。因此,在环境敏感区域建造钢桥或钢混组合桥时,亟待解决其噪声控制问题。围绕“高速铁路声屏障降噪性能与动力特性”和“钢桥减振降噪”两个研究方向,简要评述了该方向的研究动态及发展趋势。

State-of-the-art review of vibration and noise reduction of rail transit bridges in 2020

With the rapid development of high-speed railway and urban rail transit, the problems of vibration and noise become more and more prominent. The noise mitigation of traditional vertical sound barrier is obvious on wheel rail noise, but it is insufficient when the train speed exceeds 250 km/h. Therefore, fully enclosed sound barrier is pushed the construction alongside high-speed railway. In recent years, steel bridges or steel-concrete composite bridges have gradually been widely applied in high-speed railway and urban rail transit. Steel bridges or steel-concrete composite bridges have greaterer sound radiation ability, wide spectrum, large amplitude and difficult to control. Therefore, it is urgent to solve the noise radiation issue when steel bridges or steel-concrete composite bridges are built in environmentally sensitive areas. Focusing on the two study directions of "noise reduction performance and dynamic characteristics of high-speed railway sound barrier" and "vibration and noise reduction of steel bridge", the research trends and development trend of this direction are briefly reviewed in this article.