浅谈减缓机车车轮剥离

分析了当前机车车轮剥离的一种原因 ,提出减缓我国机车车轮马氏体剥离和制动剥离的方法。     

车轮踏面剥离试验研究

剥离是车轮踏面失效的主要类型。车轮剥离一般分为2种类型,一类是由滚动接触疲劳应力作用引起的剥离;另一类是由热作用和机械作用引起的剥离,主要有制动剥离和擦伤剥离。2种类型的车轮剥离实际上都与轮轨表面摩擦力直接相关。本文主要通过模拟试验研究轮轨摩擦力对车轮剥离的影响。     

软弱地基条件下大型矿石堆场斗轮机基础的设计与研究

通过建立矿石堆场地基的二维有限元模型,对矿石堆场下软弱地基的应力变形进行模拟计算,计算中采用了土体的线弹性模型和剑桥模型进行对比分析。重点研究了各种工况下堆场地基的水平、竖向变形问题,对荷载作用下斗轮机基础的长桩基、短桩基以及片筏基础设计方案进行计算,并与无基础方案进行对比分析,得出各种工况下不同基础的变位情况。计算研究成果直接为工程地基处理方案的确定及斗轮机基础的详细设计提供了依据。     

货车轮对的运用可靠性

分析了货车轮对在运用中出现故障的原因,提出了提高轮对使用期限的方法和轮对修复的具体措施。     

系统参数对独立轮对轻轨车辆动力学性能的影响

研究在轴重相同条件下,车辆相关结构参数及悬挂参数变化对独立轮对型式轻轨车辆系统动力学性能的影响特性,特别是研究通过曲线时的轮轨作用力、脱轨系数、摩擦功率的变化情况以及在轨道随机不平顺激扰作用下车辆乘坐舒适度指标变化特性。     

车轮降噪阻尼器在北京地铁车辆上的应用

噪声防治是城市轨道交通面临的一大课题,而控制轮轨噪声则是从源头来治理轨道交通噪声。文章对北京地铁车辆的轮轨噪声进行了测试和分析,并率先在地铁13号线车辆上采用了车轮降噪阻尼器,通过对比实验表明它对消除中高频轮轨噪声具有明显的作用。     

沥青路面车辙问题浅析

通过对原材料组成,结构、荷载等方面的分析,阐述了沥青路面车辙形成的原因,结合施工经验提出了一些预防车辙的具体措施。     

纤维对微表处混合料性能影响分析

微表处是一种性能优良的养护技术,在我国得到广泛的应用.检验了微表处用原材料的技术指标,在满足规范的要求上以试验分析为基础,通过使用不同纤维以及纤维的添加量,分析这些因素对微表处混合料轮辙变形试验的影响.     

Field measurements of the evolution of wheel wear and vehicle dynamics for high-speed trains

This investigation demonstrates the wheel wear evolution and related vehicle dynamics of high-speed trains with an operating distance (OD) of around two million kilometres. A long-term experimental test lasting two years was conducted to record the wheel profiles and structural vibrations of various trainsets. The wheel wear, namely the profile shape, worn distribution and wheelset conicity, is investigated for several continuous reprofiling cycles. Typical results are illustrated for the stability analysis, and the ride quality is examined with increasing OD. In addition, the vibration transition characteristics between suspensions are investigated in both the time and frequency domains. The experiments show that the dominant wear concentrates on the nominal rolling radius, and the wear rate increases with OD because of the surface softening resulting from the loss of wheel material. The vibration of structural components is aggravated by the increase of the equivalent conicity of the wheelset, which rises approximately linearly with the wheel wear and OD. High-frequency vibrations arise in the bogie and car body related to the track arrangement and wheel out-of-roundness, causing the ride comfort to worsen significantly. Additionally, the system vibration characteristics are strongly dependent on the atmospheric temperature. Summaries and conclusions are obtained regarding the wheel wear and related vehicle dynamics of high-speed trains over long operating times and distances.     

轮边减速器行星齿轮机构仿真分析与试验研究

行星齿轮机构是轮边减速器的关键部件。本文以某公司新开发的轮边减速器为模型,在SolidWorks中建立其三维模型,运用ANSYS Workbench有限元分析软件对其进行接触应力分析,查找其薄弱环节。仿真分析结果与台架试验结果基本一致,为轮边减速器的设计提供参考和指导。