Search Results - "Ambrosio, J."

Influence of pantograph suspension characteristics on the contact quality with the catenary for high speed trains by Pombo, J., Ambrósio, J.

“…► Pantograph–catenary interaction is a very important issue for railway community. ► A validated computational tool that studies with detail this interaction…”
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Enhanced UA (University of Arizona) tire model for computationally efficient and stable multibody simulations by Millan, Pedro, Ambrósio, J.

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Environmental and track perturbations on multiple pantograph interaction with catenaries in high-speed trains by Pombo, J., Ambrósio, J.

“…The top velocity of high-speed trains is generally limited by the ability to supply the proper amount of energy through the pantograph–catenary interface. The…”
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Tire–road contact modelling for multibody simulations with regularised road and enhanced UA tire models by Millan, P., Ambrósio, J.

“…Abstract Multibody simulations play an important role in the study of the dynamic behaviour of road vehicles, being one of the key aspects the modelling of the…”
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Continuous gap contact formulation based on the screened Poisson equation by Areias, P., Sukumar, N., Ambrósio, J.

“…We introduce a PDE-based node-to-element contact formulation as an alternative to classical, purely geometrical formulations. It is challenging to devise…”
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Clearance joints and friction models for the modelling of friction damped railway freight vehicles by Millan, P., Pagaimo, J., Magalhães, H., Ambrósio, J.

“…All mechanisms have mechanical joints with clearances and imperfections, either for functional reasons, enabling compliances and damping, or undesired, due to…”
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Numerical and experimental investigation on multibody systems with revolute clearance joints by Flores, P., Koshy, C. S., Lankarani, H. M., Ambrósio, J., Claro, J. C. P.

“…A comprehensive combined numerical and experimental study on the dynamic response of a slider-crank mechanism with revolute clearance joints is presented and…”
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A co-simulation approach to the wheel–rail contact with flexible railway track by Antunes, P., Magalhães, H., Ambrósio, J., Pombo, J., Costa, J.

“…The standard approach to railway vehicle dynamic analysis includes running the vehicle multibody models in rigid railway tracks. The wheel–rail contact,…”
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Derailment study of railway cargo vehicles using a response surface methodology by Pagaimo, J., Magalhães, H., Costa, J. N., Ambrósio, J.

“…Railway bogies of the Y25 family are the most common type of freight bogies used in Europe. However, this family of bogies presents poor curving performance…”
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Dynamics of chain drives using a generalized revolute clearance joint formulation by Pereira, C., Ambrósio, J., Ramalho, A.

“…Roller chain drives can be modeled as a constrained dynamic system composed of a large number of rigid bodies, links, rollers and sprockets, interconnected by…”
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On the generation of enhanced lookup tables for wheel-rail contact models by Marques, F., Magalhães, H., Liu, B., Pombo, J., Flores, P., Ambrósio, J., Piotrowski, J., Bruni, S.

“…In railway dynamics, the interpolation of lookup tables (LUTs) is a procedure utilized to reduce the computational effort when computing the wheel-rail contact…”
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A finite element methodology to model flexible tracks with arbitrary geometry for railway dynamics applications by N. Costa, J., Antunes, P., Magalhães, H., Pombo, J., Ambrósio, J.

“…•A Timoshenko beam element to represent curved rails in realistic tracks models.•A methodology for flexible railway tracks and wheel-rail contact…”
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A multivariate statistical representation of railway track irregularities using ARMA models by Costa, J. N., Ambrósio, J., Frey, D., Andrade, A. R.

“…Railway track irregularities occur naturally from service operations and are characterised by deviations of the track relative to its nominal geometry. Since…”
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HERK integration of finite-strain fully anisotropic plasticity models by Areias, P., Rabczuk, T., Ambrósio, J.

“…For finite strain plasticity, we use the multiplicative decomposition of the deformation gradient to obtain a differential-algebraic system (DAE) in the…”
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Wheel-rail contact models in the presence of switches and crossings by Magalhaes, H., Marques, F., Antunes, P., Flores, P., Pombo, J., Ambrósio, J., Qazi, A., Sebes, M., Yin, H., Bezin, Y.

“…The development and implementation of wheel-rail contact models in multibody codes are two active research topics, aiming at improving the accuracy of…”
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Influence of the aerodynamic forces on the pantograph-catenary system for high-speed trains by Pombo, J., Ambrósio, J., Pereira, M., Rauter, F., Collina, A., Facchinetti, A.

“…Most of the high-speed trains in operation today have the electrical power supply delivered through the pantograph-catenary system. The understanding of the…”
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A window moving inverse dynamics optimization for biomechanics of motion by Quental, C., Folgado, J., Ambrósio, J.

“…The application of musculoskeletal models to estimate muscle and joint reaction forces usually requires optimization strategies, regardless of using inverse or…”
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A new shoulder model with a biologically inspired glenohumeral joint by Quental, C, Folgado, J, Ambrósio, J, Monteiro, J

“…Highlights • A large-scale multibody model of the upper limb with 6 degrees of freedom for the glenohumeral joint is presented. • The glenohumeral joint is…”
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Multibody system of the upper limb including a reverse shoulder prosthesis by Quental, C, Folgado, J, Ambrósio, J, Monteiro, J

“…The reverse shoulder replacement, recommended for the treatment of several shoulder pathologies such as cuff tear arthropathy and fractures in elderly people,…”
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Virtual pantograph-catenary environment for control development based on a co-simulation approach by Ramalho, P., Antunes, P., Ambrósio, J., Macedo, A. M., Pissarra, S.

“…Multibody dynamics methodologies have the potential to integrate in a unique simulation environment the different disciplines, each one with its own…”
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