【作者】 章天杨；

【导师】 邱延峻；

【作者基本信息】 西南交通大学 ， 道路与铁道工程， 2010， 硕士

【摘要】 随着我国大规模的铁路提速改造工程的实施,以及大力发展高速客运专线的需要,无砟轨道开始大量应用。但是普通的板式轨道也产生了一些难以克服的问题,比如刚度太大,易开裂,不易维修养护等,其中之一就是严重的噪声危害。在各种铁路噪声中,轮轨滚动噪声随着列车速度的提高成为主要的噪声源。目前控制轮轨滚动噪声的措施主要是通过改善和优化轨上结构来实现的,而很少考虑轨下基础对噪声的影响。沥青混凝土作为一种良好的材料在高速公路上得到了大量的应用,其弹性好、防水、易于维修等优点都是水泥混凝土不具备的。本论文依托课题——成灌城际铁路全断面沥青混凝土强化基床表层路基结构试验研究,利用Abaqus有限元软件,建立ACRS-1型、ACRS-2型和普通板式3种结构的轮轨滚动噪声模型,分别对其轮轨滚动噪声进行数值仿真模拟,通过计算和比较,分析了不同轨下基础的噪声水平。本文主要的研究内容和成果如下：(1)建立包含沥青混凝土轨下基础的轮轨滚动噪声模型；(2)通过计算比较,分析沥青混凝土轨下基础的降噪性能,结果显示,ACRS-1型结构比普通板式轨道降噪2dB(A)左右；(3)对ACRS-1型结构进行参数敏感性分析,发现噪声随着沥青层厚度的增大而减小,随着沥青层温度的增大而增大,但是这种变化不是很明显。更多还原

【Abstract】 With the implementation of China’s large-scale railway speed improvement and transformation, and a strong need for the development of high-speed passenger line, ballastless track began large applicated. But ordinary slab track also produced a number of difficult issues to overcome, such as great stiffness, too easy to crack, hard to maintance, one of them is a serious noise hazard. In a variety of railway noise, wheel/rail rolling noise, as the train speeds increase to become a major noise source. Currently measures in control of wheel-rail rolling noise mainly by improving and optimizing the rail structure to achieve, but rarely considered the impact of the foundation under rail. Asphalt concrete as a good material get a lot of applications in the highway, having the advantages of good elasticity, waterproof, easy to maintain that the cement concrete is not available. This thesis relying on the subject-the study of the embankment structure test for the full section of asphalt reinforced foundation of Chengdu-Dujiangyan inter-city rail, using Abaqus finite element software, establish the wheel/track noise model of three kinds of structures that is ACRS-1 type, ACRS-2 type and ordinary slab track. With the numerical simulation of the wheel/track noise of these structures, through calculation and comparison, this thesis analyses the noise level of different foundations under rail.The mian content and results of the study are as follows:(1) Established the wheel/rail rolling noise model with asphalt concrete foundation under track;(2) By calculating and comparative, analysed the noise reduction performance of asphalt concrete foundation under rail, the results showed that the noise of the ACRS-1 type is 2dB(A) lower than the ordinary slab track’s.(3) Through the Parameter Sensitivity Analysis of the ACRS-1 type, found that the noise decreases with the increase of the thickness of asphalt layer, increases as the increase of the temperature of the asphalt layer, but this change is not obvious.更多还原