Infinite Boundary Elements
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Estudo e aplicação de um elemento de contorno infinito na análise da interação solo-estrutura via combinação MEC/MEF / Study and application of an infinite boundary element for soil-structure interaction analysis via FEM/BEM coupling
Neste trabalho, é desenvolvido um programa de computador para a análise estática e tridimensional de problemas de interação solo-estrutura. O programa permite considerar várias camadas de solo, cada qual com características físicas diferentes. Sobre este solo, o qual pode conter estacas, podem ser apoiados diversos tipos de estruturas, tais como plac
Publicado em: 2009
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2. DYNAMIC BEHAVIOR OF BURIED PIPES: METHODOLOGY AND COMPUTATIONAL IMPLEMENTATION / COMPORTAMENTO DINÂMICO DE DUTOS ENTERRADOS: METODOLOGIA E IMPLEMENTAÇÃO COMPUTACIONAL
This work presents a numerical methodology for the analysis of buried pipes employed by the transport of oil and gas subject to dynamic loads. Emphasis is given to seismic loads. A finite element model based on a special class of beam element for the pipe representation is employed. Both geometric and material nonlinearities are considered in a total Lagrang
Publicado em: 2008
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3. Desenvolvimento de um novo algoritmo para análise viscoplástica com o método dos elementos de contorno. / Development of a new boundary elements algorithm for viscoplastic analysis.
The search for new mathematical models and innovative techniques for numerical analyses has been subject of many research studies. In analysis of models with infinite and semi-infinite domains, the Boundary Element Method (BEM) has been proved to be one of the most efficient numerical tools. On the other hand, in nonlinear analyses the BEM requires the evalu
Publicado em: 2007
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4. Numerical methods for the dynamics of unbounded domains
The present article discusses the relation between boundary conditions and the Sommerfeld radiation condition underlying the dynamics of unbounded domains. It is shown that the classical Dirichlet, Neumann and mixed boundary conditions do not fulfill the radiation condition. In the sequence, three strategies to incorporate the radiation condition in numerica
Computational & Applied Mathematics. Publicado em: 2005-04
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5. Analise vibro-acustica utilizando o metodo de elementos finitos com mapeamento Dirichlet-to-Neumann (DtN)
This work were interested in finding a method of fluid-structure coupling with infinite fluid medium. After a literature analysis in infinite fluid medium modeling, were adopted the Dirichlet-to-Neumann (DtN) Method, wich is exact, non refiexive and can be directly included in the Finite Element Method (FEM) wich is used in fluid-structure modeling. First, t
Publicado em: 1999
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6. STUDY OF THE HYBRID BOUNDARY ELEMENT METHOD AND THE PROPOSAL OF A SIMPLIFIED FORMULATION / ESTUDO DO MÉTODO HÍBRIDO DOS ELEMENTOS DE CONTORNO E PROPOSTA DE UMA FORMULAÇÃO SIMPLIFICADA / ESTUDIO DEL MÉTODO HÍBRIDO DE LOS ELEMENTOS DE CONTORNO Y PROPUESTA DE UNA FORMULACIÓN SIMPLIFICADA
The hybrid boundary element method was introduced in 1987. Since then, the method has been applied successfully to different problems of elasticity and potential, including time-dependent problems. However, some important aspects of the method have remained open to investigation. This dissertation consists in a threefold contribution, with developments outli
Publicado em: 1999
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7. Solução de problemas poroelasticos atraves do metodo dos elementos de contorno
The Biot s theory af poroelasticity is revisited making it more easily applicable to practical problems. The parameters used by Biot are redefined as functions of other ones with an easier and simpler physical interpretation. This helps their determination and the understanding of poroelastic phenomena. The equations that govern the theory of quasi-static li
Publicado em: 1995