长沙市轨道交通1号线车辆车内噪声特性分析

Internal noise characteristics analysis for Changsha Metro Line 1 vehicles

文章分析了长沙市轨道交通1号线车辆司机室和客室,在隧道内和隧道外两种运行工况下的噪声特性。根据实测结果,本项目双层地板及阻尼涂层的地板结构和型腔结构的顶盖结构,在隧道内和隧道外均起到了应有的作用。隧道内运行时,司机室噪声指标相对隧道外显著增加。根据测试结果,查找了车辆原因并提出了有效的整改措施,为后续新项目提供了设计优化方向。

This paper analyzes the noise property of saloon and cab for Changsha Metro Line 1 vehicles, when running in the tunnel and out of the tunnel. Based on the test result, double-layer floor and damper cling on the frame, and cavity layout roof have excellent sound insulation when train runs in and out tunnel. Noise level in cab increases when train runs in the tunnel. This paper finds the reason according to test, and advances reasonable proposal for follow-up project.