噪声与振动控制2016，Vol.36Issue(6)：126-130,196,6.DOI:10.3969/j.issn.1006-1335.2016.06.025
无砟轨道-箱梁结构振动传递及参数影响分析
Parameter Analysis of Vibration Transmission of Ballastless Track and Box-girder Bridge Systems
摘要
Abstract
With the wide use of the track-bridges in railroad transportation engineering, the vibration and noise problem of the bridge structure caused by high speed trains is being paid close attention to. In this paper, with a 32 m ballastless-track box-girder bridge as an object, the numerical model of the coupled system of the track, slab, CA mortar, concrete base and the box girder is set up for the analysis of the vibration transmissibility and parameters influence of the bridge vibration. The result shows that the attenuation of the low frequency vibration below 10 Hz is slower than the higher frequency vibration;the lateral vibration level below 10 Hz of the web of the box girder is about 10%of that of the vertical vibration, however, both lateral vibration and vertical vibration are nearly in the same level for the frequencies above 10 Hz;appropriate bridge supports have some vibration reduction effect for the low-frequency vibration, while the flexible fasteners have a vibration reduction effect for the box-girder bridge in the high-frequency range of vibration, and the CA mortar layer stiffness has less impact on the vibration of the bridge structure;the fasteners with low stiffness can reduce the vibration of the bridge but can intensify the track vibration. The results are helpful for the vibration and noise reduction design of the track bridges.关键词
振动与波/无砟轨道/箱梁/传递Key words
vibration and wave/ballastless track/box girder/transmission分类
数理科学引用本文复制引用
罗锟,雷晓燕,曾少辉..无砟轨道-箱梁结构振动传递及参数影响分析[J].噪声与振动控制,2016,36(6):126-130,196,6.基金项目
国家自然科学基金资助项目(U1134107，51268015）；江西省研究生创新专项资金资助项目(YC2015-B061) （U1134107，51268015）；江西省研究生创新专项资金资助项目(YC2015-B061）
