Finite element simulation prior to reconstruction of a steel railway bridge to reduce structure-borne noise
Finite element simulation prior to reconstruction of a steel railway bridge to reduce structure-borne noise
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DOI：
10.1016/j.engstruct.2011.11.001
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发表时间：
2012-02
影响因子：
5.5
通讯作者：
K. Alten;R. Flesch
中科院分区：
文献类型：
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作者：
K. Alten;R. Flesch
作为一座跨越多瑙河的铁路桥重建的一部分，在项目规划阶段进行了数值模拟，以研究对结构噪声辐射起重要作用的因素。参数研究集中在新桥的两种可能的施工技术上：一种是带有有碴轨道的正交异性钢桥面，另一种是具有预应力混凝土桥面板和嵌入式轨道系统的组合桥。其目的是找到结构振动方面的最佳解决方案，从而减少共振效应，因为桥梁部件的振动增加了滚动噪声，而共振效应比地面轨道更明显。随着铁路越来越多地修建在人口稠密的地区，这个问题已经成为环境影响评估的核心问题。本文描述的材料和结构模型所获得的结果已在下奥州的Tulln铁路桥上成功实施，同时还实施了其他降噪措施，如隔音屏障和钢轨打磨。
As part of the reconstruction of a railway bridge across the river Danube, numerical simulations were carried out during the planning stages of the project in order to investigate factors which play an important role in the radiation of structure-borne noise. The parameter studies centred around two possible construction techniques for the new bridge: an orthotropic steel deck with ballasted track, versus a composite bridge with a pre-stressed concrete deck plate and an embedded rail system. The aim was to find the optimum solution in terms of structural vibration and thus reduce resonance effects which are perceived more strongly than for tracks at-grade, as the vibration of bridge components adds to the rolling noise. Seeing as rail tracks are increasingly built in densely populated areas, this problem has become a core issue during environmental impact assessments. The results acquired from the material and structural modelling described herein were successfully implemented in the Tulln railway bridge in Lower Austria, alongside other noise-reducing measures such as sound barriers and rail grinding.