Pedro Antunes

Pedro Antunes
University of Huddersfield · Institute of Railway Research

Doctor of Engineering

About

28
Publications
19,234
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
409
Citations

Publications

Publications (28)
Article
Full-text available
Multibody dynamics methodologies have the potential to integrate in a unique simulation environment the different disciplines, each one with its own equilibrium equations and computational methods. The key issue is not so much the ability to include the different modelling and solution methods in the same computer code, but much more the possibilit...
Article
The development and implementation of wheel-rail contact models in multibody codes are two active research topics, aiming at improving the accuracy of numerical results and computational efficiency of the dynamics analysis. However, the realism of numerical results is challenged when considering switches and crossings (S&C), where the most adverse...
Article
The dynamic analysis of railway vehicles requires an accurate representation of the vehicle, the track geometry and structure, and their interaction. Generally, flexible tracks models with curved geometries represent the rails with straight beam elements, which results in a piecewise linear representation of the rails. As a result, the wheel-rail c...
Article
For modern electrical rail systems, the pantograph-catenary dynamic performance is one of the most critical challenges. Too much fluctuation in contact forces leads to either accelerated wear of the contacting components or losses of contact and, consequently, arcing. In this work, inertance-integrated pantograph damping systems are investigated wi...
Article
The interaction between the rolling stock and the infrastructure plays a crucial role in railway vehicle dynamics. The standard approach consists of using a multibody formulation to model the railway vehicles running on simplified tracks. The track model can be rigid, if it comprises only a geometric description of the rail; semi-rigid, if it consi...
Article
In high-speed rail operations, the irregularity of the overhead system is a typical disturbance that affects the pantograph-catenary interaction performance. The existing methods, which treat the contact wire irregularities as hard spots, overestimate the negative effect of the irregularities on the contact force, leading to conservative results. I...
Chapter
The development of detailed multibody models of railway vehicles is essential to address industrial problems through computational tools. The assessment of vehicle dynamic performance is one of the studies that can be performed with a multibody software. But when tilting trains are considered, which comprise active suspension elements, control engi...
Article
Full-text available
The development of wheel–rail contact models is an active topic of railway research with the dual objective of improving the accuracy of multibody simulations and reducing its computational effort. This paper extends the online Hertzian contact model, proposed by Pombo et al. (Veh. Syst. Dyn. 45: 165–189, 2007) to propose a non-Hertzian contact mod...
Article
In high-speed rail operations, the irregularity of the overhead system is a typical disturbance that affects the pantograph-catenary interaction performance. The existing methods, which treat the contact wire irregularities as hard spots, overestimate the negative effect of the irregularities on the contact force, leading to conservative results. I...
Article
The pantograph–catenary system is responsible to provide an uninterrupted energy supply to power electric traction railway vehicles. The analysis of the dynamic behaviour of the catenary and pantograph, as well as its interaction, has been the objective of active research to improve energy collection quality. This work proposes an approach for the...
Article
Full-text available
The standard approach to railway vehicle dynamic analysis includes running the vehicle multibody models in rigid railway tracks. The wheel–rail contact, independently of the rolling contact model used, is either handled online or via lookup tables. This traditional approach disregards the coupling effects between the railway vehicle dynamics and th...
Chapter
A roller coaster ride consists of a vehicle negotiating a track characterized by a sequence of spatial curves and straight lines. During the track negotiation, the occupants are subjected to accelerations that depend, not only on the car speed variation, but also on the instantaneous curvature of the track. The design of the roller coaster geometry...
Conference Paper
Railway dynamics is a multidisciplinary area that involves several fields of research. From a mechanical point of view, the aim is to study the dynamic behaviour of the rail vehicle. In this case, detailed vehicle modelling methodologies are used, generally using the multibody system formulation, while the track is generally considered as a rigid s...
Conference Paper
The definition of roller coaster tracks requires the accurate description of their spatial geometries, which is usually done with the parameterisation of the track centerline. Nevertheless, the construction of such track models is not an easy task as it requires the definition of a collection of three-dimensional segments with complex geometries an...
Conference Paper
The contact quality between pantograph and catenary plays a critical role in providing the required energy to power the trains' traction systems. The need to study and analyze the dynamic behavior of these coupled systems has led to the development of pantograph/catenary interaction simulation software. Despite the increasing interest in the dynami...
Chapter
Full-text available
In the framework of multibody dynamics, the path motion constraint enforces that a body follows a predefined curve being its rotations with respect to the curve moving frame also prescribed. The kinematic constraint formulation requires the evaluation of the fourth derivative of the curve with respect to its arc length. Regardless of the fact that...
Article
Full-text available
The pantograph–catenary dynamic interaction analysis program (PantoCat) addresses the need for a dynamic analysis code able to analyse models of the complete overhead energy collecting systems that include all mechanical details of the pantographs and the complete topology and structural details of the catenary. PantoCat is a code based on the fini...
Article
Full-text available
The dynamic analysis of railway vehicles involves the independent construction of models representing vehicle, track and wheel-rail contact. In this work, a multibody formulation with Cartesian coordinates is used to describe the kinematics of the rigid bodies and joints in the vehicle model. In order to create detailed three-dimensional track fini...
Conference Paper
Full-text available
The dynamic analysis of railway vehicles involves the construction of three independent models: The vehicle model; the track model; and the wheel-rail contact model. In this paper, a finite element methodology is proposed to create detailed three-dimensional track models, which includes the flexibility of the rails and of the substructure. In this...
Article
The pantograph-catenary system represents one of the major barriers to rolling stock interoperability. Traditionally, each country has developed its own overhead equipment, which is reflected in different catenary and pantograph designs. Hence, a unified approval method, able to consider the diversity of existing solutions, is a key subject that mu...
Conference Paper
A crucial system for the operation of high-speed trains is the pantograph catenary interface as it is the sole responsible to deliver electrical power to the train. Any lack of contact between the pantograph registration strips and the catenary contact wire leads not only to arcing, with all its consequences in terms of thermal and mechanical degra...
Article
Full-text available
High-speed railway overhead systems are subjected to tight functional requirements to deliver electrical energy to trains while their reliability and maintenance periods have to be increased. The quest for interoperability of different pantographs in existing and projected catenary systems puts an extra level of demand on the ability to control the...
Article
Full-text available
The quality of the current collection of high-speed trains is dependent on the compatibility of the catenary and pantograph dynamics and on its implications on the contact force. The design and analysis of these systems using proper computational procedures allows capturing all the relevant features of their dynamic behavior. This work proposes an...
Conference Paper
Full-text available
High-speed railway overhead systems are subjected to tight functional requirements to deliver electrical energy to train engines, while their reliability and maintenance periods have to be increased. The quest for interoperability of different pantographs in existing and projected catenary systems puts an extra level of demand on the ability to con...
Conference Paper
Full-text available
The pantograph-catenary system represents one of the major barriers to rolling stock interoperability. Traditionally, each country has developed its own overhead equipment, which is reflected in different catenary and pantograph designs. Hence, a unified approval method, able to consider the diversity of existing solutions, is a key subject that mu...

Network

Cited By

Projects

Project (1)
Archived project