Multi-body dynamics-based sensitivity analysis for a railway vehicle

Ding, Guofu, He, Yong, Zou, Yisheng, Li, Rong, Ma, Xiaojia and Qin, Sheng-feng (2015) Multi-body dynamics-based sensitivity analysis for a railway vehicle. Proceedings of the Institution of Mechanical Engineers Part F - Journal of Rail and Rapid Transit, 229 (5). pp. 518-529. ISSN 0954-4097

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A railway vehicle is a complicated mechatronic system. Its mechanical structure and connections are key influences on its performance. When a railway vehicle runs at very high speeds its dynamic performance becomes of considerable interest. Therefore, the identification of the design factors that significantly impact on the vehicle's running behavior, such as safety, stability, comfort and reliability, is a key step towards vehicle design optimization. The optimal design of a railway vehicle is difficult to perform using existing methods due to the complexity inherent in rail/track interactions. Thus, performing a sensitivity analysis of a railway vehicle can be seen as a bridge between performance analysis and an optimal design. This paper presents a sensitivity model that can be used to analyze the performance parameters of a railway vehicle in terms of variation of its design parameters. First, the railway vehicle is described as a multi-body system that can be broken down into its component parts and then, the dynamic behavior of the system is investigated. To simplify the model, a spring/damper connection is used in the classic Hertz nonlinear elastic contact model to represent the force in the normal direction at the wheel/rail contact point. Finally, based on the adjoint variable method, the equations that constitute the sensitivity model of the railway vehicle are derived and analysis software is developed. A case study shows the reliability of the proposed approach.

Item Type: Article
Additional Information: Published online before print - 23 January 2014
Uncontrolled Keywords: Railway vehicle, sensitivity analysis, multi-body system, dynamics
Subjects: W200 Design studies
Department: Faculties > Arts, Design and Social Sciences > Design
Depositing User: Users 6424 not found.
Date Deposited: 09 Jul 2015 11:57
Last Modified: 12 Oct 2019 19:40

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