Numerical simulation of the post-derailment behaviour of a railway vehicle and its interaction with the infrastructure

IF 2.6 2区 工程技术 Q2 MECHANICS
Matteo Santelia, Francesco Mazzeo, Riccardo Rosi, Egidio Di Gialleonardo, Stefano Melzi, Stefano Bruni
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引用次数: 0

Abstract

Train derailments may have catastrophic consequences, and therefore suitable measures should be designed and installed at specific safety-relevant sites to mitigate their effects. Mitigation measures, such as guard rails and containment walls, aim at restraining the motion of the derailed vehicle using suitable derailment containment devices. However, the design and structural sizing of these devices is challenging as the quantification of the loads caused by the impact with the vehicle is complex.

The aim of this paper is to extend previous work from the same authors aimed at defining a non-linear multi-body model for the simulation in time-domain of the post-derailment behaviour of a railway vehicle and the impact on a derailment containment wall. The extension presented in this paper is concerned with the model of the interaction of the derailed vehicle with the sleepers and with the ballast. To this aim, an algorithm is introduced to manage the different possible contact conditions the wheels of the vehicle may undergo during the derailment process: contact with the rail, with the sleepers and with the ballast. Then, a model of the impact between the derailed wheels and the sleepers is introduced, and a terramechanic model defining the forces acting on the wheels sinking in the ballast is established. The effect of the accurate modelling of forces exchanged by the derailed wheels with the sleepers and the ballast is quantified for a relevant derailment scenario and shown to be highly relevant to the estimation of the impact loads applied to the containment structure.

Abstract Image

轨道车辆出轨后的行为及其与基础设施相互作用的数值模拟
列车脱轨可能会造成灾难性后果,因此应在与安全相关的特定地点设计和安装适当的措施,以减轻其影响。护栏和防撞墙等缓解措施旨在利用合适的脱轨防撞装置抑制脱轨车辆的运动。本文的目的是对作者之前的工作进行扩展,旨在定义一个非线性多体模型,用于时域模拟铁路车辆脱轨后的行为以及对脱轨安全墙的撞击。本文介绍的扩展模型涉及脱轨车辆与枕木和道碴的相互作用。为此,本文引入了一种算法来管理脱轨过程中车辆车轮可能经历的不同接触条件:与轨道、枕木和道碴的接触。然后,引入脱轨车轮与枕木之间的撞击模型,并建立一个确定车轮在道碴中下沉时所受力的地形力学模型。精确模拟脱轨车轮与枕木和道碴之间的力交换对相关脱轨情况的影响进行了量化,结果表明这与安全壳结构所受冲击载荷的估算高度相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
6.00
自引率
17.60%
发文量
46
审稿时长
12 months
期刊介绍: The journal Multibody System Dynamics treats theoretical and computational methods in rigid and flexible multibody systems, their application, and the experimental procedures used to validate the theoretical foundations. The research reported addresses computational and experimental aspects and their application to classical and emerging fields in science and technology. Both development and application aspects of multibody dynamics are relevant, in particular in the fields of control, optimization, real-time simulation, parallel computation, workspace and path planning, reliability, and durability. The journal also publishes articles covering application fields such as vehicle dynamics, aerospace technology, robotics and mechatronics, machine dynamics, crashworthiness, biomechanics, artificial intelligence, and system identification if they involve or contribute to the field of Multibody System Dynamics.
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