轮轨接触几何计算及其对动力学稳定性的影响
本文主要所做的工作如下：
（1）介绍了国内外的高速列车的发展现状以及轮轨接触几何对车辆稳定性的影响研究的进展及其必要性。
(2)对几种不同的轮轨接触几何计算方法进行分析。
(3)着重分析了单论对稳定性的基本特征及车辆稳定性的非线性稳定性的研究方法，对蛇形运动的成因特点及其危害进行了分析。
（4）对轮轨滚动接触几何的非线性参数有了一定的定义和阐释。分析了两种不同型面的轮对和相应型面钢轨匹配时的线性临界速度。进而对单轮对的稳定性进行了讨论分析。结合文献资料在Adams中建立轮对动力学模型，分析了在等效锥度相接近时，非线性参数的变化及其车辆动力学的响应。
毕业论文关键词：轮轨接触；投影轮廓；旋转体；
Wheel/rail contact geometry calculation, its influence on the dynamic stability
ABSTRACT: Chinese high-speed railway has entered into the age of high-speed and l mileage.Wheel-rail rolling contact will be a major impact on the stability of the high-speed vehicles.With the actual situation of the high-speed railway, thispaper compares several different methods of wheel-rail geomet calculated and studies on the vehiclesta bilivty on the wheel-rail contact geometry.
1n this paper, the following work.
(1)Present wheel-rail rolling contact geometry and vehicle stability study at home and abroad the necessity of stability studies.
(2) We alyze several different calculation methods of wheel-rail rolling contact and comp are the results of their calculations.
(3) Review the basic characteristics of sing wheel's stability and research methods of vehicle linear stability and nonlinear stability; analyze the concept of stability and the high-spend vehicles' snaking movement and its hazards.
(4) Define the linear and nonlinear parameters of the wheel-rail rolling contact.
Establish a simulated model of single stability, analyze different wheel-rail models' linear critical speed, discuss the stability of the single wheel.And then set up vehicle namics model in Adams/Rail，analyze the influence to the vehicle dynamic due to non-linear parameter changes at the same equivalent conicity.
KEYWORDS: Wheel-rail contact, projection profile, rotating body
目录
1 绪论 1
1.1 课题的目的和意义 1
1.2 国内外研究现状与水平 2
1.3 发展趋势 4
1.4 本课题的基本内容 4
2 轮轨接触几何计算 5
2.1 简介 5
2.2 基于迹线法的轮轨滚动接触几何计算 7
2.3 基于投影轮廓的轮轨滚动接触几何计算 10
2.3.1 轮对的参数化表示及坐标系转换 10
2.3.2 平行投影轮廓生成 11
2.3.3 投影轮廓必要的条件 12
2.3.4 投影轮廓的确定 13
2.3.5 三文迭代求解 13
2.4 几种计算方法的比较分析 14
2.4.1 车轮型面的选择 14