针对声屏障的轨道交通的降噪研究

Noise Reduction for Sound Barrier in Rail Traffic

该文针对目前轨道交通中普遍使用的声屏障的降噪方案,提出了在轻轨轨道间增加双面吸声声屏障的新方案,以此来达到进一步降噪的目的。运用边界元方法,建立轨道声屏障降噪的边界元分析模型,利用边界元仿真软件SYSNOISE得到仿真结果,在此基础上预测声屏障的降噪效果。并研究分析了声屏障高度对降噪性能的影响,通过对比不同高度的降噪性能,得到最佳声屏障高度。最终通过对两种方案的降噪结果的对比,说明新的方案具有更好的降噪效果。

The paper gives a new method that can decrease the level of noise in the rail traffic. Comparing with the present method, the new method adds a sound barrier which can absorb noise between the railways of the light rail. Boundary Element Method （BEM） is presented for solving the acoustic problems. The BEM software SYSNOISE is used to get the simulative acoustic results. Comparing the results of different height of the sound barrier, we get the best height. Comparing the results of the two different methods, we draw the conclusion that the new method can decrease the level of noise in the rail traffic better.