弓网滑动电接触摩擦力特性与建模研究

2018年7月电工技术学报Vol.33 No. 13 第33卷第13期TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Jul. 2018 DOI：10.19595/https://www.360docs.net/doc/da10028729.html,ki.1000-6753.tces.170698

弓网滑动电接触摩擦力特性与建模研究

郭凤仪陈明阳陈忠华时光回立川

（辽宁工程技术大学电气与控制工程学院葫芦岛 125105）

摘要电气化铁路受电弓与接触网（弓网）系统的载流摩擦性能是影响列车受流和受电弓滑板磨损的关键因素。该文利用销盘式高速载流摩擦磨损实验机，以浸金属碳磨销与纯铜盘为摩擦副，获得与压力载荷、滑动速度、电流密度相关的摩擦力特性规律。摩擦力随着压力载荷的增加而增大，随着电流密度的增加而减小，随着滑动速度的增加而增大。并且随着压力载荷的增加，摩擦力的增大幅度逐渐变缓。在此基础上，采用支持向量机建立弓网系统下与压力载荷、滑动速度、电流密度相关的摩擦力回归模型，采用遗传算法进行参数优化。利用实验数据，验证模型的有效性，为今后弓网系统摩擦力的进一步研究提供参考。

关键词：弓网系统载流摩擦摩擦力支持向量机回归模型

中图分类号：TM501

Research on Friction Characteristics and Modeling of

Pantograph-Catenary Sliding Electrical Contact

Guo Fengyi Chen Mingyang Chen Zhonghua Shi Guang Hui Lichuan （Faculty of Electrical and Control Engineering Liaoning Technical University Huludao 125105 China）Abstract The friction performance with current of the pantograph-catenary system of electrified railway is the key factor that affects the train current-carrying and the wear of pantograph slide. In this paper, the pin-on-disc high-speed current-carrying friction and wear experimental machine, with copper-impregnated carbon grinding pin and pure copper disc as friction pair, was used to obtain friction characteristics related to pressure load, sliding velocity and current density. The friction increases with the increase of the pressure load, decreases with the increase of the current density, and increases with the increase of the sliding speed. And with the increase of the pressure, the friction increases amplitude is slow.

On the basis, the friction regression model was established by using support vector machine (SVM), which was related to pressure load, sliding speed and current density with the pantograph-catenary system. Genetic algorithm was used to optimize the parameters. The validity of the model is verified by the experimental data, which provides a reference for further research on the friction of pantograph-catenary system.

Keywords：P antograph-catenary system,current carrying friction, friction, support vector machine, regression model

0引言

电气化铁路中，受电弓滑板与接触网导线组成一对特殊摩擦系统，即摩擦接触系统和电接触系统，两者之间彼此影响，共同作用，具有复杂性和交叉性[1]。受电弓与接触网（弓网）系统的载流摩擦磨损性能直接影响电力机车的动力供应和弓网系统的维护成本[2-5]。而载流摩擦磨损是滑动电接触的主要特征，其中摩擦力是造成接触磨损的主要因素，因此针对弓网系统摩擦力的研究具有现实意义。

有关弓网滑动电接触载流摩擦力方面的研究，

国家自然科学基金资助项目（51477071）。

收稿日期 2017-05-24 改稿日期 2017-09-28 万方数据