Listar GI-GMNE - Congresos, conferencias, etc. por autor "Casteleiro, Manuel"
Mostrando ítems 1-20 de 68
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A BEM approach for grounding grid computation
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (Computational Mechanics Publications, 1994)[Abstract] Grounding systems are designed to preserve human safety and grant the integrity of equipments under fault conditions. To achieve these goals, the equivalent electrical resistance of the system must be low ... -
A BEM formulation for computational design of grounding systems in stratified soils
Colominas, Ignasi; Aneiros Blanco, Juan M.; Navarrina, Fermín; Casteleiro, Manuel (Centro Internacional de Métodos Numéricos en Ingeniería, 1998)[Abstract] Substation grounding design involves computing the equivalent resistance of the earthing system -for reasons of equipment protection-, as well as distribution of potentials on the earth surface -for reasons of ... -
A computer aided design system for the analysis of transferred potentials in earthing systems
Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (2002)[Abstract] In this work we present a CAD system based on this BEM numerical formulation for the analysis of a common problem in electrical engineering practice, that is, the existence of transferred potentials in a ... -
A general formulation based on the boundary element method for the analysis of grounded instalations in layered soils
Colominas, Ignasi; Navarrina, Fermín; Aneiros Blanco, Juan M.; Casteleiro, Manuel (Computational Mechanics Publications, 1998)[Abstract] The design of safe grounding systems requires computing the potential level distribution on the earth surface for reasons of human security, as well as the equivalent resistance of the earthing installation ... -
A general numerical model for grounding analysis in layered soils
Colominas, Ignasi; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (Civil-Comp, 2000)[Abstract] The safety of the persons, the protection of the equipment and the continuity of the power supply are the main objectives of the grounding system of a large electrical installation. For its accurate design, it ... -
A massively parallel BEM numerical model for grounding analysis in layered soils
Colominas, Ignasi; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (Fundacja Zdrowia Publicznego "Vesalius", 2001)[Abstract] In the last years the authors have developed a numerical formulation based on the Boundary Element Method for the analysis of grounding systems embedded in uniform soils. This approach has been implemented in a ... -
A meshless numerical approach for the analysis of earthing systems in electrical installations
Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Chao López, Mar; Navarrina, Fermín; Casteleiro, Manuel (Technische Universität München, 1999)[Abstract] In the last three decades some numerical formulations have been developed for solving potential problems in electrical engineering applications. In the particular case of the grounding analysis area, in recent ... -
A meshless numerical formulation for the solution of potential problems in engineering applications
Colominas, Ignasi; Chao López, Mar; Navarrina, Fermín; Casteleiro, Manuel (Tech Science Press, 1998) -
A minimum weight FEM formulation for Structural Topological Optimization with local stress constraints
París, José; Muíños Pantín, Iago; Navarrina, Fermín; Colominas, Ignasi; Casteleiro, Manuel (2005)Since Bendsoe and Kikuchi proposed the basic concepts in 1988, most of topology structural optimization results have been obtained so far by means of a maximum stiffness (minimum strain energy, minimum compliance) approach. ... -
A minimum weight with stress constraints FEM approach for topology structural optimization problems
Muíños Pantín, Iago; Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (2002)[Abstract] Sizing and shape structural optimization problems are normally stated in terms of a minimum weight approach with constraints that limit the maximum allowable stresses and displacements. However, topology ... -
A numerical approach based on the BEM for computing transferred earth potentials in grounding analysis
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (2003)[Abstract] In this paper we present a numerical approach based on the Boundary Element Method for the analysis of a very common problem in electrical engineering practice: the existence of transferred earth potentials in ... -
A numerical approach for computing transferred potentials in grounding analysis
Colominas, Ignasi; Navarrina, Fermín; Gómez Calviño, Javier; Casteleiro, Manuel (2001) -
A particle numerical approach based on the SPH method for computational fluid Mechanics
Colominas, Ignasi; Cueto-Felgueroso Landeira, Luis; Mosqueira Martínez, Gonzalo; Navarrina, Fermín; Casteleiro, Manuel (2004)[Abstract] Meshfree methods have experimented an important improvement in the last decade. Actually, we can say that the emerging meshless technology constitutes the most promising tool to simulate complex problems in ... -
A stabilized finite element approach for advective-diffusive transport problems
Figueroa Álvarez, Carlos Alberto; Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Navarrina, Fermín; Casteleiro, Manuel (Escola Politécnica da Universidade de Sao Paulo, 1999)[Abstract] As it is well-know, the numerical simulation in fluid mechanics is quite difficult specially when the velocity of the fluid is important. These problems are reflected in the apparearance of numerical oscillations ... -
A unified approach for high order sensitivity analysis
Navarrina, Fermín; Colominas, Ignasi; Juanes, Rubén; Bendito Pérez, Enrique; Casteleiro, Manuel (Computational Mechanics Publications, 2001)[Abstract] Many engineering problems require solving PDEs by means of numerical methods (type FEM/BEM) which sensivity analysis entails taking derivatives of functions defined through integration. In sizing optimization ... -
A validation of the boundary element method for grounding grid design and computation
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (Centro Internacional de Métodos Numéricos en Ingeniería, CIMNE (Barcelona), 1992)[Abstract] Several widespread intuitive techniques developed during the last two decades for substation grounding analysis, such as the Average Potential Method (APM), have been recently identified as particular cases of ... -
An efficient MP algorithm for structural shape optimization problems
Navarrina, Fermín; Tarrech i Masdeu, Ramón; Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Gómez Calviño, Javier; Casteleiro, Manuel (Computational Mechanics Publications, 2001)[Abstract] Integral methods -such as the Finite Element Method (FEM) and the Boundary Element Method (BEM)- are frequently used in structural optimization problems to solve systems of partial differential equations. ... -
An enriched meshless numerical approach for potential theory problems
Mosqueira Martínez, Gonzalo; Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (The International Center of Numerical Methods in Engineering, 2000)[Abstract] One of the meshless thechniques that have been recently proposed for solving Boundary Value Problems is the so-called Weighted Least Square (WLS) Method with a Point Collocation approach. Meshless methods were ... -
Analytical integration techniques for earthing grid computation by boundary element methods
Navarrina, Fermín; Colominas, Ignasi; Casteleiro, Manuel (Centro Internacional de Métodos Numéricos en Ingeniería, CIMNE (Barcelona), 1992)[Abstract] Analysis and design of substation earthing involves computing the equivalent resistance of grounding systems, but also distribution of potentials on the earth surface due to fault currents [1]. While very crude ... -
Análisis de formulaciones numéricas SPH para la resolución de problemas de flujo con superficie libre
Cueto-Felgueroso Landeira, Luis; Mosqueira Martínez, Gonzalo; Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (2002)[Abstract] El objetivo de este artículo es estudiar las distintas formulaciones tipo Smooth Particle Hydrodynamics (SPH) propuestas para aplicaciones a problemas de fluidos, especialmente los relacionados con flujo en ...