Optimization of high-speed railway pantographs for improving pantograph-catenary contact

被引:72
|
作者
Ambrosio, Jorge [1 ]
Pombo, Joao [1 ]
Pereira, Manuel [1 ]
机构
[1] Univ Tecn Lisboa, IDMEC IST, Ave Rovisco Pais, P-1049001 Lisbon, Portugal
关键词
high-speed; railway; pantograph;
D O I
10.1063/2.1301306
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
A crucial system for the operation of high-speed trains is the pantograph catenary interface as it is the sole responsible to deliver electrical power to the train. Being the catenary a stationary system with a long lifespan it is also less likely to be redesigned and upgraded than the pantographs that fit the train vehicles. This letter proposes an optimization procedure for the improvement of the contact quality between the pantograph and the catenary solely based on the redesign of the pantograph head suspension characteristics. A pantograph model is defined and validated against experimental dynamic characteristics of existing pantographs. An optimization strategy based on the use of a global optimization method, to find the vicinity of the optimal solution, followed by the use of a deterministic optimization algorithm, to fine tune the optimal solution, is applied here. The spring stiffness, damping characteristics and bow mass are the design variables used for the pantograph optimization. The objective of the optimal problem is the minimization of the standard deviation of the contact force history, which is the most important quantity to define the contact quality. The pantograph head suspension characteristics are allowed to vary within technological realistic limits. It is found that current high-speed railway pantographs have a limited potential for mechanical improvements, not exceeding 10%-15% on the decrease of the standard deviation of the contact force. (C) 2013 The Chinese Society of Theoretical and Applied Mechanics.
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页数:7
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