Implementation of a non-Hertzian contact model for railway dynamic application

Magalhães, H.; Marques, Filipe; Liu, Binbin; Antunes, Pedro; Pombo, João; Flores, Paulo; Ambrósio, Jorge; Piotrowski, J.; Bruni, Stefano

doi:10.1007/s11044-019-09688-y

Cited by 53 publications

(51 citation statements)

References 75 publications

(172 reference statements)

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“…This approach was originally developed by British Railway Research for elliptic contacts and was recently extended to non-Hertzian contact patches [157,158]. Recently, a contact model incorporating both a fast non-Hertzian method to solve the normal problem and a non-Hertzian book of tables has been proposed in [126].…”

Section: Wheel-rail Contact Models In a Multibody Dynamics Contextmentioning

confidence: 99%

State-of-the-art and challenges of railway and road vehicle dynamics with multibody dynamics approaches

et al. 2020

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A review of the current use of multibody dynamics methods in the analysis of the dynamics of vehicles is given. Railway vehicle dynamics as well as road vehicle dynamics are considered, where for the latter the dynamics of cars and trucks and the dynamics of single-track vehicles, in particular motorcycles and bicycles, are reviewed. Commonalities and differences are shown, and open questions and challenges are given as directions for further research in this field.

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Section: Wheel-rail Contact Models In a Multibody Dynamics Contextmentioning

confidence: 99%

State-of-the-art and challenges of railway and road vehicle dynamics with multibody dynamics approaches

et al. 2020

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“…Such studies require the use of advanced computational tools and experiments to validate models and de-risk the development of new technology. This involves using Multi-Body (MB) systems methodologies for railway vehicle dynamics to study different type of problems [2][3][4][5], including virtual homologation [6,7], study of the vehicle performance for selected tracks [8,9], derailments prevention [10][11][12][13][14][15], design of suspensions [16][17][18], tracks with complex geometries [19][20][21][22], traction or braking systems [23,24], pantograph-catenary interaction [25][26][27][28][29][30][31][32][33][34][35], just to mention a few.…”

Section: Figure 1: Overview Of Vehicle-track Interaction and Damagementioning

confidence: 99%

Impact of rail infrastructure maintenance conditions on the vehicle-track interaction loads

Ariaudo¹,

Verardi²,

Pombo

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The rail infrastructure and the track components are expensive assets with long life spans and high maintenance costs. The cost efficiency, performance and punctuality of train operations heavily depend on the track conditions. Ideally, the railway track would be completely smooth providing continuous support to the rolling stock running on it. In practice, however, the infrastructure cannot be installed without irregularities. These defects will increase over time due to the service loads imposed by the railway vehicles. The aim of this work is to use advanced computational tools to predict how the vehicles will respond to changing levels of track defects. For this purpose, the track and its maintenance conditions are characterized in realistic operation scenarios and modelled with detail in order to enable studying the interaction loads that are imposed to the vehicles by the track conditions. The presented methodology enables to identify the track health indexes that have higher influence on the dynamic loads transmitted to the rolling stock. It was observed that the track layout, track irregularities and degradation of the rails have the larger influence on the vehicle-track interaction loads with consequences in terms of safety and maintenance costs. In this way, this work contributes to the development of solutions with technological relevance, giving answer to the industry’s most recent needs in terms of reducing the maintenance costs and decreasing the incidents that cause traffic disruptions, contributing to improve the competitiveness of the railway transport.

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“…The study of railway vehicle dynamics by using multibody systems methodologies has been increasing its popularity in the past years, due to its efficiency and reliability to formulate and solve different type of problems [1][2][3][4], namely virtual homologation of vehicles [5,6], study of the vehicle performance for selected tracks [7,8], derailments prevention [9][10][11][12], design of suspension, traction or braking systems [13][14][15], just to mention a few. One of the major issues concerning the dynamic modelling and simulation of railway vehicles deals with the evaluation of the vehicle-track interaction, which consists of the solution of the contact between the wheels and the rails.…”

Section: Introductionmentioning

confidence: 99%

“…When the colliding bodies present simple geometries, the contact detection phase can be a straightforward task and solved analytically. However, in the most general case, where the contacting surfaces have an arbitrary shape, the search for potential contact points might become a demanding and complex task [3,35].…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional approach for contact detection between realistic wheel and rail surfaces for improved railway dynamic analysis

Marques

Magalhães

Pombo

et al. 2020

Mechanism and Machine Theory

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The wheel-rail contact modelling problem assumes a preponderant role on the dynamic analysis of railway systems using multibody systems formulations. The accurate and efficient evaluation of both location and magnitude of the wheel-rail contact forces is fundamental for the development of reliable computational tools. The wheel concave zone might be a source of numerical difficulties when searching the contact points, which has been neglected in several works. Here, it is demonstrated that the minimum distance method does not always converge when the wheel surface is not fully convex, being an alternative methodology proposed to perform the contact detection. This approach examines independently the contact between each wheel strip and the rail, where the maximum virtual penetration is determined and associated with the location of the contact point. Then, an Hertzian-based force model is considered for both normal and tangential forces. The results obtained from dynamic simulations show that the minimum distance method and the proposed methodology provide a similar response for simplified wheel profiles. However, the new approach described here is reliable in the identification of the contact point when realistic wheel profiles are considered, which is not the case with the minimum distance method.

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Implementation of a non-Hertzian contact model for railway dynamic application

Cited by 53 publications

References 75 publications

State-of-the-art and challenges of railway and road vehicle dynamics with multibody dynamics approaches

State-of-the-art and challenges of railway and road vehicle dynamics with multibody dynamics approaches

Impact of rail infrastructure maintenance conditions on the vehicle-track interaction loads

A three-dimensional approach for contact detection between realistic wheel and rail surfaces for improved railway dynamic analysis

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