Kriging-PSO-based shape optimization for railway wheel profile

IF 1.5 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Long Liu, Bing Yi, Xiaofei Shi, Xiang Peng
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引用次数: 0

Abstract

The reduction of wheel-rail wear is a fundamental task in railway engineering that significantly affects the operating performance in the lifecycle. To improve the dynamic response and profile wear evolution performance of wheel-rail interaction, a shape optimization procedure for the railway wheel profile is proposed. First, the geometry modeling method, which ensures the continuity of first-order derivation of the wheel profile, is introduced to generate a large number of candidate profiles, and multibody dynamics simulation is conducted to analyze the dynamics response of the wheel profiles, including wear index, lateral force, lateral acceleration of the frame and derailment coefficient. Then, the Kriging model is constructed to establish the relationship between the design variables and objectives obtained by multibody dynamics simulation, and particle swarm optimization (PSO) is employed to evaluate the optimal parameters for wheel profile that simultaneously considers wheel wear, stability, and lateral force. Finally, the performance of the wheel-rail interaction is evaluated to demonstrate the effectiveness of the proposed method. The numerical simulation result indicates that the optimized wheel profile not only has good performance, including contact state, pressure, and friction at the design stage, but also the physical performance is acceptable after a long-term profile evolution during service, which the maximum wear depth of the optimal wheel profile averagely decreases over 10 % in long-term wear evolution.

基于 Kriging-PSO 的铁路车轮轮廓形状优化技术
减少轮轨磨损是铁路工程中的一项基本任务,会严重影响铁路在全寿命周期内的运行性能。为改善轮轨相互作用的动态响应和轮廓磨损演化性能,提出了一种铁路轮廓形状优化程序。首先,引入几何建模方法,确保轮廓一阶推导的连续性,生成大量候选轮廓,并进行多体动力学仿真,分析轮廓的动态响应,包括磨损指数、侧向力、车架侧向加速度和脱轨系数。然后,构建 Kriging 模型来建立多体动力学仿真得到的设计变量与目标之间的关系,并采用粒子群优化(PSO)来评估同时考虑车轮磨损、稳定性和侧向力的车轮轮廓的最优参数。最后,对轮轨相互作用的性能进行了评估,以证明所提方法的有效性。数值模拟结果表明,优化后的轮廓不仅在设计阶段具有良好的性能,包括接触状态、压力和摩擦力,而且在服役期间经过长期轮廓演变后,其物理性能也是可以接受的,在长期磨损演变中,优化轮廓的最大磨损深度平均下降了 10%以上。
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来源期刊
Journal of Mechanical Science and Technology
Journal of Mechanical Science and Technology 工程技术-工程:机械
CiteScore
2.90
自引率
6.20%
发文量
517
审稿时长
7.7 months
期刊介绍: The aim of the Journal of Mechanical Science and Technology is to provide an international forum for the publication and dissemination of original work that contributes to the understanding of the main and related disciplines of mechanical engineering, either empirical or theoretical. The Journal covers the whole spectrum of mechanical engineering, which includes, but is not limited to, Materials and Design Engineering, Production Engineering and Fusion Technology, Dynamics, Vibration and Control, Thermal Engineering and Fluids Engineering. Manuscripts may fall into several categories including full articles, solicited reviews or commentary, and unsolicited reviews or commentary related to the core of mechanical engineering.
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