Listar GI-GMNE - Congresos, conferencias, etc. por título
Mostrando ítems 13-32 de 78
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A minimum weight FEM formulation for Structural Topological Optimization with local stress constraints
(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
(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
(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 refraction-diffraction model in the ray-front coordinate system
(Computational mechanics: new trends and applications (CD-ROM), 1998)[Resument] A model for the propagation of water waves is presented, which retrieves the concepts of rays and fronts from the geometrical optics approximation. Their definition here is nevertheless different in that it ... -
A particle numerical approach based on the SPH method for computational fluid Mechanics
(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
(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
(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
(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
(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
(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
(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
(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 ... -
Aplicación de una formulación numérica de elementos finitos para el estudio de problemas de transporte convectivo en zonas portuarias
(Sociedad Española de Métodos Numéricos en Ingeniería, 1999)[Resumen] La ecuación diferencial del trasporte por convección-difusión permite modelizar un gran número de procesos de interés en la ingeniería. Así, fenómenos com el estudio de la distribución de temperaturas en una pieza ... -
Application of meshless methods to the analysis and design of grounding systems
(Centro Internacional de Métodos Numéricos en Ingeniería, 1998)[Abstract] Analysis and design of grounding systems of electrical installations involves computing the potential distribution in the earth and the equivalent resistance of the system. Several numerical formulations based ... -
Cálculo de potenciales transferidos en grandes sistemas de redes de tierra de subestaciones eléctricas
(Departamento de Matemática Aplicada, Universidad de Salamanca, 2001)[Resumen] En este artículo se presenta el análisis mediante una formulación numérica de elementos de contorno de un problema común en la ingeniería eléctrica como es la existencia de potenciales transferidos en una instalación ... -
Cálculo y diseño asistido por ordenador de tomas de tierra para subestaciones eléctricas
(2002)[Resumen] En este trabajo se presenta una formulaci´on num´erica para el c´alculo y dise˜no asistido por ordenador de tomas de tierra que es aplicable a un amplio rango de instalaciones el´ectricas reales. La formulaci´on ... -
Computing stabilization parameters in numerical models for advective-diffusive transport problems
(Universidade de Aveiro, 2000)[Abstract] Numerical modelling in Fluid Mechanics is particulary difficult in high-advective fluid problems. The Finite Element Method, which has been sucessfully applied to very challenging problems in Computational ... -
Desarrollo de una formulación basada en los métodos multiescala para la resolución de problemas de transporte convectivo-difusivos
(2002)[Resumen] La resolución de la ecuación de convección-difusión mediante el Método de los Elementos Finitos con ponderación convencional tipo Galerkin presenta numerosas inestabilidades cuando la velocidad del fluido es ... -
Desarrollo de una formulación numérica basada en el MEF para la estabilización de problemas de transporte por convección-difusión
(Sociedad Española de Métodos Numéricos en Ingeniería, 1999)[Resumen] La modelización de problemas en mecánica de fluidos cuando la velocidad del fluido es elevada resulta complicada debido a la aparición de inestabilidades en la solución numérica al emplear esquemas convencionales ...