【作者】 尹海涛；

【导师】 曾京；

【作者基本信息】 西南交通大学 ， 载运工具运用工程， 2004， 硕士

【摘要】 随着国民经济的飞速发展，铁路运输速度也在不断的提高，由此铁路噪声对铁路周边环境的影响也越来越严重，对于铁路噪声的防治问题则越来越重要，而铁路车轮的高频振动是产生铁路噪声的主要源动力。世界上不少国家早已经开始对降低铁路噪声进行研究，并取得了一定的成功，我国也正在开展降低铁路噪声的研究工作。本文结合国内、外铁路噪声的研究，主要进行铁路车轮高频振动的研究。 论文首先简要介绍了国内、外对铁路噪声的研究成果。接着对车轮和钢轨的滚动接触关系及相互作用力进行分析，对轮轨粗糙度功率谱密度进行分析。本文的重点是对一个轮对施加一定的位移功率谱，研究轮对的振动响应。首先建立了一个标准轮对的模型，是一个有9584个单元，12663个节点有限元模型，通过ANSYS有限元分析软件对其施加位移激励，进行频谱分析，得到轮对各部位的功率响应谱，以此分析轮对不同部位对于踏面激励的响应，从而得知轮对那一部位的振动对整个轮对的影响最大。根据这一分析结果，对轮对关键部位的几何结构进行优化，设计了两种新型低噪声轮对，并对这两种轮对进行有限元分析、比较。 研究结果表明，对轮对的轮箍、轮辐及其过渡部位的几何形状进行优化，可以有效的降低轮对的振动，进而降低由轮对产生的噪声。本文的研究工作为设计低噪声车轮提供了参考依据。更多还原

【Abstract】 With the rapid development of the national economy, the speed of the railway operation is raising continuously. So the infection of the railway noise on the environment is becoming serious and the prevention of railway noise is becoming more and more important. The high frequency vibration of the wheel is the primary source for the producing of railway noise. The railway noise problems have been paid attention by many countries in the world and some important achievements have been obtained. The noise problems are also studied in our country and the research is only in the initial stage. The main work of this thesis is on the studies of the high frequency vibration of the wheel on the basis of the work home and abroad.Firstly, the abroad and domestic researches on railway noise are described briefly. Secondly, the wheel/rail contact geometry, wheel/rail interactive forces and the wheel/rail roughness are studied. In this thesis, a wheelset finite element model with 9584 elements and 12663 nodes is set up by using the ANSYS software, and the modal shapes and dynamic responses of the different parts of the wheel are calculated. On the basis of analysis, two new low-noise wheelsets are designed and analysed.Through the research above, it can be concluded that the geometry of the spoke, the wheel-hoop and the part between the spoke and the wheel-hoop can be optimized that can reduce the vibration and the noise of the wheel. The work of this thesis can provide the theoretical base for the design of low-noise wheel for railway vehicles.更多还原