A multi-objective optimisation method of rail combination profile in high-speed turnout switch panel

被引:7
|
作者
Fang, Jiasheng [1 ,2 ]
Chen, Rong [1 ,2 ]
Chen, Jiayin [1 ,2 ]
Xu, Jingmang [1 ,2 ]
Wang, Ping [1 ,2 ]
机构
[1] Southwest Jiaotong Univ, Key Lab High Speed Railway Engn, Minist Educ, Chengdu, Peoples R China
[2] Southwest Jiaotong Univ, Sch Civil Engn, Chengdu, Peoples R China
基金
中国国家自然科学基金;
关键词
High-speed turnout; multi-objective optimisation; contact characteristics; dynamic performance; contact damage; ROLLING-CONTACT FATIGUE; GENETIC ALGORITHM; DESIGN; WEAR;
D O I
10.1080/00423114.2022.2052327
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This paper presents a multi-objective optimisation method considering the switch and stock rail profiles in the switch panel. Based on the non-uniform rational B-spline (NURBS) theory, a parameterised model of the measured turnout profile is constructed to determine the variables. This study selects the vehicle dynamic performance and wheel-rail contact damage as the objective function to establish a multi-objective optimisation mathematical model that is solved using NSGA-II. Overall performances of the measured profile and the optimised profile are compared and evaluated for two aspects, dynamic performance and wheel-rail contact damage. The following are the conclusions: The maximum lateral vibration acceleration of the axle box is reduced from 2.64-2.09 m/s(2), which has a 20.83% decrease. Concerning wheel-rail contact damage, the maximum wear index is reduced from 13.46-11.47 N, the reduction is 14.78%. At the same time, the cumulative surface rolling contact fatigue (RCF) is reduced from 8.29x10(-5)-7.38x10(-5). This article can provide a profile repair method for worn turnouts, which can maximise the comprehensive performance of the turnout within a limited amount of grinding, and can reduce the wheel-rail contact damage of the turnout while taking into account driving stability.
引用
收藏
页码:336 / 355
页数:20
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