Modelling,simulation and applications of longitudinal train dynamics

ABSTRACT

Significant developments in longitudinal train simulation and an overview of the approaches to train models and modelling vehicle force inputs are firstly presented. The most important modelling task, that of the wagon connection, consisting of energy absorption devices such as draft gears and buffers, draw gear stiffness, coupler slack and structural stiffness is then presented. Detailed attention is given to the modelling approaches for friction wedge damped and polymer draft gears. A significant issue in longitudinal train dynamics is the modelling and calculation of the input forces – the co-dimensional problem. The need to push traction performances higher has led to research and improvement in the accuracy of traction modelling which is discussed. A co-simulation method that combines longitudinal train simulation, locomotive traction control and locomotive vehicle dynamics is presented. The modelling of other forces, braking propulsion resistance, curve drag and grade forces are also discussed. As extensions to conventional longitudinal train dynamics, lateral forces and coupler impacts are examined in regards to interaction with wagon lateral and vertical dynamics. Various applications of longitudinal train dynamics are then presented. As an alternative to the tradition single wagon mass approach to longitudinal train dynamics, an example incorporating fully detailed wagon dynamics is presented for a crash analysis problem. Further applications of starting traction, air braking, distributed power, energy analysis and tippler operation are also presented.     

Optimum design of tilting bogie frame in consideration of fatigue strength and weight

This paper addresses the use of finite-element (FE) analysis to calculate the fatigue strength of a bogie frame, for the development of tilting trains in Korea. A multi-body dynamic analysis was performed to extract the load condition by tilting on curves. Using the results of the multi-body dynamic analysis and the load scenario setout in the UIC standard, FE analysis was performed to obtain the stress distribution and to calculate the fatigue strength. An attempt was made to minimize the weight of the bogie frame using a back-propagation artificial neural network (ANN). The results of this study reveal that the stresses at some nodes are near the fatigue limit in the Goodman diagram and by using back-propagation ANN, the weight of the bogie frame could be reduced by 4.7%.     

确定旅客列车合理开车范围的代数方法

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LKJ－93型列车运行监控记录装置记录系统

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地理信息系统及其在TMIS中的应用

阐述了GIS的基本概念及特点，详细论述了当前广泛应用的开发工具，重点介绍了Maplnfo开发平台及设计方法，研究并提出了在现有TMIS系统基础上构建货车追踪地理信息系统的设想及方案。     

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力集中式200km/h电动车组的微机控制系统

介绍了动力集中式２００ ｋｍ ／ｈ 电动车组微机控制系统、列车总线及控制、诊断功能，重点介绍电动车组微机系统的新功能和新特点。     

我国高速列车动力相对分散方式方案初探

通过深入分析主速列车动力集中与动力分散两种动力配置方式的特点。阐明了动力分散配置方式也能适应中国国情的观点。     

TM1型机车的微机控制系统

向伊朗出口的ＴＭ１型机车与双层客车组成两动十拖的推挽式动车组，两台机车配置在首尾两端。文章介绍了机车微机系统的三级控制及由列车总线、车厢总线、控制器总线组成的计算机网络，以及实现机车重联控制的技术关键。