轨道交通高架桥结构边界对桥梁结构噪声影响研究  

Research on the Influence of Structural Boundary of Rail Transit Viaduct on the Structure-Born Noise

作　　者：周力[1] 罗雁云[1] ZHOU Li LUO Yan - yun(Institute of Rail Transit, Tongji University, Shanghai 200000, Chin)

机构地区：[1]同济大学铁道与城市轨道交通研究院,上海200000

出　　处：《安徽理工大学学报（自然科学版）》2016年第5期20-24,58,共6页Journal of Anhui University of Science and Technology:Natural Science

摘　　要：城市轨道交通在给人们出行带来便捷的同时,也给人们的生活带来了一些问题。针对城市轨道交通高架线在车辆运行过程产生的桥梁结构噪声问题,在车辆轨道动力学基础上,以双线单室箱型梁为对象,建立车轮-轨道-桥梁动力学耦合模型,通过模拟真实的车辆运行过程,计算出不同结构边界条件下桥梁在列车经过时的振动情况。建立桥梁声-固耦合模型,通过对比不同结构边界条件下桥梁结构噪声的声场场点声压,发现对桥梁边界进行约束能够降低桥梁结构噪声。Urban rail transit improves people＇s life, but meanwhile brings some problems. Aiming at the problem of the bridge structureborn noise caused by the urban rail transit, the wheels -rail -bridge coupling system was built basing on vehicle - track dynamics theory, and then the vibration level of box girder with different boundary conditions could be achieved in the simulation model, On this foundation, the acoustical -structure coupling model was established. It is found that the constraint of bridge boundary can reduce the structure noise level by calculating the sound field of bridge structure noise under different boundary conditions.

关 键 词：箱型梁 有限元 振动 结构噪声 

分 类 号：U24[交通运输工程—道路与铁道工程] TB123[理学—工程力学]