谈金龙客车前部电器控制盒的烧毁

金龙KLQ6796客车曾发生2次烧毁前部电器控制盒的事故，本文从烧毁的过程、现场特点出发，结合对前部电器控制盒的拆检，来分析引起烧毁的原因，并提出改进意见。     

汽车主销后倾角和内倾角的测量计算方法

精确计算、测量汽车主销后倾角、内倾角,对于车辆悬挂系统的设计、试验、检测具有重要的实际应用价值。通过分析悬挂及测量原理,从测量的角度建立了主销后倾角的几何模型,推导出主销角度的精确计算公式,并对近似公式进行了误差分析。结果表明:在主销角度较小且所设定转盘角度较小的情况下,经验值与精确值比较接近;当主销角度较大或所设定转盘角度加大的时候,经验值误差加大,利用经验近似公式计算的主销角度准确度明显降低。     

汽车驾驶员前视野测量装置的优化设计及应用

介绍一种汽车驾驶员前方视野测量装置优化设计的技术方案、装置结构、具体实施方法和应用效果。     

自卸车货箱与底盘总布置分析

目前国内几大重型汽车生产厂家主要以生产汽车底盘为主,货箱几乎全部依赖于委改厂家,而委改厂生产货箱时,由于受宽度限制,为使货箱尽可能大,只能将货箱加长,常常导致整车轴荷分配不均,用户在使用中出现车头"上翘"或者是方向"沉重"甚至车架下弯变形等现象。根本原因在于货箱的尺寸与整车轴距和轴荷没有很好的匹配布局。本文通过对车辆轴荷、轴距和货箱的相互之间内在关系,分析总结出货箱尺寸及轴距的经验计算公式,通过验证符合实际情况,能较好解决此类问题,敬请批评指正。     

VDS-A01客车前悬架系统仿真分析

以全承载客车VDS-A01作为研究对象,根据其整车参数及性能要求,对前悬架系统进行选型设计。采用系统动力学程序ADAMS/Car模块,建立前悬架系统虚拟样机模型,并进行运动学仿真分析。结果表明,仿真结果与设计试验结果相吻合,从而验证该方法的可行性以及VDS-A01设计的正确性。     

Effect of curved track support failure on vehicle derailment

In order to investigate the effect of curved track support failure on railway vehicle derailment, a coupled vehicle–track dynamic model is put forward. In the model, the vehicle and the structure under rails are, respectively, modelled as a multi-body system, and the rail is modelled with a Timoshenko beam rested on the discrete sleepers. The lateral, vertical, and torsional deformations of the beam are taken into account. The model also considers the effect of the discrete support by sleepers on the coupling dynamics of the vehicle and track. The sleepers are assumed to move backward at a constant speed to simulate the vehicle running along the track at the same speed. In the calculation of the coupled vehicle and track dynamics, the normal forces of the wheels/rails are calculated using the Hertzian contact theory and their creep forces are determined with the nonlinear creep theory by Shen et al [Z.Y. Shen, J.K. Hedrick, and J.A. Elkins, A comparison of alternative creep-force models for rail vehicle dynamic analysis, Proceedings of the 8th IAVSD Symposium, Cambridge, MA, 1984, pp. 591–605]. The motion equations of the vehicle/track are solved by means of an explicit integration method. The failure of the components of the curved track is simulated by changing the track stiffness and damping along the track. The cases where zero to six supports of the curved rails fail are considered. The transient derailment coefficients are calculated. They are, respectively, the ratio of the wheel/rail lateral force to the vertical force and the wheel load reduction. The contact points of the wheels/rails are in detail analysed and used to evaluate the risk of the vehicle derailment. Also, the present work investigates the effect of friction coefficient, axle load and vehicle speed on the derailments under the condition of track failure. The numerical results obtained indicate that the failure of track supports has a great influence on the whole vehicle running safety.     

铁道车辆用闸瓦的技术动向

本文从说明铁道车辆用闸瓦的种类入手,描述了既有线车辆的闸瓦与车轮的特性,说明了铁道系统中闸瓦的作用。     

Development of a real-time bogie test rig model based on railway specialised multibody software

The design of mechatronic systems of rail vehicles requires performing verification and validation in the real-time mode. One useful validation instrument is the application of software-in-the-loop, hardware-in-the-loop or processor-in-the-loop simulation approaches. All of these approaches require development of a real-time model of the physical system. In this paper, the investigation of the usage of the model of the locomotive's bogie test rig created in Gensys multibody software has been performed and the calculation time for each time step has been analysed. The verification of the possibility of the usage of such an approach for real-time simulation has been made by means of a simple data transferring process between Gensys and Simulink through the TCP/IP interface. The limitations and further development issues for the proposed approach have been discussed in this paper.     

摩托车和轻便摩托车辐条式车轮标准简介

摩托车和轻便摩托车辐条式车轮标准从3个方面对辐条式车轮的技术要求及试验方法进行了编制:1)对车轮的基本要求;2)对轮毂辐条孔的极限拉力、辐条、条母组件的极限拉力、条母的拧紧力矩等限值作出了规定;3)辐条式车轮的4项性能要求。通过试验验证,径向冲击试验合格率为60%,径向载荷疲劳试验合格率为83.3%,扭转疲劳试验合格率为100%,证明标准是可行的。     

前置低地板公交系列客车及底盘的开发

详细介绍了该系列客车和底盘主要配置及其特点,强调了同类前置客车国内首创的二级踏步结构、可左右调整的驾驶座椅机构、不等宽双内摆前门结构等多项创新技术的开发应用.整车实现了两级踏步,并且具有良好的动力性、经济性、舒适性、制动性及操纵稳定性,各项主要技术性能指标达国内领先水平.