基于支持向量回归的地铁受电弓滑板磨耗趋势预测模型研究

针对列车供电系统中重要组成部分之一的受电弓滑板磨耗问题，设计了一款预测模型对地铁受电弓滑板磨耗趋势进行有效的拟合和预测，弥补了现有的检测系统只能对受电弓进行实时检测的不足。利用线性支持向量回归（SVR-Linear）、最小二乘支持向量回归（LSSVR）和优化后的最小二乘支持向量回归（MI-LSSVR）对检测系统得到的受电弓滑板数据进行训练和拟合，并利用训练后的模型实现滑板磨耗的预测，其中，MI-LSSVR的拟合精度最高，达到97.3%。此外，利用地铁行走的里程数据进行预测，提前得到下一次运行后的滑板厚度，在滑板即将磨耗到限时进行预测，可得到滑板还能承受的运行里程，减少受电弓检修人员的工作量，提高受电弓的使用效率。     

SPOPS statement of methods

The Simulation Programme for Overhead contact lines – Pantograph System (SPOPS) is based on a two-dimensional finite element model of an overhead contact line and a lumped mass model for a pantograph. The SPOPS allows for a lateral change of contact points between the pantograph and the contact wire and for the rolling motions of contact strips in the pantograph model. Thus, the programme can consider the stagger of a contact wire in a dynamic simulation. Either a penalty method or a Lagrange multiplier method can be chosen to model the contact phenomenon between a pantograph and a contact wire. According to pantograph–catenary benchmark results, the simulation results obtained from the SPOPS are very close to the average values of the simulation results obtained from programmes implemented in the benchmark work in all cases, including a three-dimensional (3-D) case. These benchmark results demonstrate that the SPOPS is as accurate as other fully 3-D simulation programmes while utilising minimal computational efforts.     

The results of the pantograph–catenary interaction benchmark

This paper describes the results of a voluntary benchmark initiative concerning the simulation of pantograph–catenary interaction, which was proposed and coordinated by Politecnico di Milano and participated by 10 research institutions established in 9 different countries across Europe and Asia. The aims of the benchmark are to assess the dispersion of results on the same simulation study cases, to demonstrate the accuracy of numerical methodologies and simulation models and to identify the best suited modelling approaches to study pantograph–catenary interaction. One static and three dynamic simulation cases were defined for a non-existing but realistic high-speed pantograph–catenary couple. These cases were run using 10 of the major simulation codes presently in use for the study of pantograph–catenary interaction, and the results are presented and critically discussed here. All input data required to run the study cases are also provided, allowing the use of this benchmark as a term of comparison for other simulation codes.     

接触网弹性链形悬挂的弓网关系检测

本文论述了弓网关系检测的目的、内容、具体方法和检测数据对施工的指导作用,提出了“受电弓限界”的概念,介绍了国外接触网的静、动态评价标准和弹性链形悬挂施工的关键技术。     

高速受流性能探讨

简述高速情况下影响机车受流性能的几个主要因素及其机理， 并对提高受流性能提出了简统化的设想。     

摆式列车受电弓倾摆机构运动学分析

对于动力分散的摆式电动车组,带受电弓的车体倾摆时,受电弓也要作相应的倾摆,才能保证受电弓与接触网的正常接触。文章根据受电弓技术要求,运用ADAMS软件,对基于四连杆机构的被动式受电弓倾摆机构进行了几何建模以及运动学分析。对倾摆机构尺寸参数进行了优化,使受电弓在车体倾摆过程中始终处于正常工作范围之内,以确保受电弓正常受流,为受电弓倾摆机构的设计开发提供了依据。     

新开发的受电弓弓头碳滑板安装法

从运用的观点来看,受电弓弓头碳基滑板的安装方法是非常重要的.碳滑板一般用带贴紧钢套包层的楔型榫制成,或用能夹紧整个碳滑板的金属装配架制作,用螺栓固定在受电弓弓头上.作者开发了其他3种新的安装方法.并阐述了日本在过去20多年里对碳基滑板材料所进行的开发,以及对所开发的安装方法进行试验室试验或现场试验的结果.     

700系电动车组用单臂型受电弓

阐述了700系电动车组用单臂型受电弓的研制过程。通过一系列的试验表明,单臂型受电弓具有结构简单、噪声低的优点。     

接触网受电弓动态实时视频监控系统的研究

本文对电气化铁道接触网受电弓动态实时视频监控系统的组成、主要功能和特点、关键技术、系统调试进行了介绍,并且阐述了其先进性与实用性,为电气化铁道提供了一种全新的科技手段。     

大风情况下接触网—受电弓故障浅析

本文对大同铁路分局近年来在大风下发生的弓网故障进行了详尽的分析,找出了发生故障的规律和原因,提出了一些改造方案和建议并得以实施,取得了良好效果,有一定的参考价值。