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Showing 1 to 20 of 35 for “"Elementos de Contorno"”.

  1. Método dos elementos de contorno para elasticidade tridimensional

    Curotto, Claudio LuizUniversidade Federal do Rio de Janeiro1981

    … Body forces and thermal effects are considered in the forrnulation. Isoparametric elemnts of plane triangular shape with linear variation for the functions, define the boundary. The integrals over the elements are calculated by an analitical and numerical process. By the application of the …

    brazil-uerj Repository record

  2. Método dos Elementos de Contorno para elasticidade linear bidimensional

    Moreira, Márcio Sampaio SarmetUniversidade Federal do Rio de Janeiro1983

    … The traction discontinuity problem is considered by introducing addicional equations obtained from the elastic invariant properties, for the cases of corner points with prescribed displacements only. For body forces arising from a fixed gravitational field, two formulations are utilized for …

    brazil-uerj Repository record

  3. Resolução de problemas viscoelásticos utilizando o método dos elementos de contorno

    Neves, André de CarvalhoUniversidade Federal do Rio de Janeiro1988

    The present work deals with a two-dimensional boundary element implementation for viscoelastic problems through the application of the Laplace transform and the correspondence principle. The inverse transform is obtained by using Durbin's method coupled with a Fast Fourier Transform (F.F.T.) …

    brazil-uerj Repository record

  4. Uma formulação de elementos de contorno para análise de vibrações livres

    Guedes, Solange da SilvaUniversidade Federal do Rio de Janeiro1988

    … is used instead of the non-linear frequency dependent harmonic fundamental solution. The numerical implementation is carried out for plane stress or plane strain. The boundary geometry is represented by straight elements, being the tractions and boundary displacements aproximated by quadratic …

    brazil-uerj Repository record

  5. Aplicação do Método dos Elementos de Contorno a problemas de campo

    Sá, Pedro Augusto Cézar Oliveira deUniversidade Federal do Rio de Janeiro1980

    This work deals with the application of the Boundary Element Method to the potencial problems which bear an isotropic three-dimensional domain, are in permanent regime and are governed by Poisson's Equation. The problem and the method are described at first. Then the application of the method and …

    brazil-uerj Repository record

  6. Uma aplicação do método dos elementos de contorno a problemas de contacto

    Motter, José GeraldoUniversidade Federal do Rio de Janeiro1991

    This work is concerned with the development of a computer program for evaluation of 2-D plane strain or plane stress contact problems between two elastic bodies with frictional forces on the contact surfaces, by means of the boundary element method. The half-plane fundamental solution is …

    brazil-uerj Repository record

  7. Uma formulação hipersingular do método dos elementos de contorno para problemas bidimensionais

    Prado, Ademir Aparecido doUniversidade Federal do Rio de Janeiro1991

    The objetive of this thesis is to develop an alternative formulation for the Boundary Element Method using a Hipersingualar integral equation for natural variables. Bidimentional problems governad by the Laplace Equation and Elastostatic are solved. Examples are presented and results are compared …

    brazil-uerj Repository record

  8. Método dos elementos de contorno aplicado a propagação de ondas gravitacionais não lineares

    Zambrozuski, Newton Jorge MunaretoUniversidade Federal do Rio de Janeiro1992

    … to discretize the boudary. The procedure developed for non moving boundary problems can be applied to study the hidraulic flow in rivers, reservoir and channels (open or not open). The procedure developed for moving boundary problems can be applied to simulate non-linear gravitational …

    brazil-uerj Repository record

  9. O método dos elementos de contorno aplicado à propagação transiente tridimensional de ondas

    Bustamante, Adolfo Ricardo CastroUniversidade Federal do Rio de Janeiro1986

    … functions (potential). A FORTRAN computer code was developed to solve numerically the integral equation for three-dimensional scalar wave equation (Kirchhoff integral representation). The influence in the numerical solution of employing different time interpolation functions for boundary …

    brazil-uerj Repository record

  10. Intrusão salina em aquíferos costeiros: uma análise pelo Método de Elementos de Contorno

    Cabral, Jaime Joaquim da Silva PereiraUniversidade Federal do Rio de Janeiro1985

    … of water of good quality has led to a considerable increase in the volume of pumped groundwater. An important groundwater problem is salt water intrusion that may be defined as the landward movement of seawater interface. Intrusion can result from excessive pumping in coastal aquifers and …

    brazil-uerj Repository record

  11. Método de elementos de contorno de reciprocidad dual aplicado a la termoelasticidad anisótropa desacoplada

    Pedraza Rodríguez, M. Consolación2012

    Desde que el hombre empezó a construir ha sido necesario el conocimiento del comportamiento de los materiales. Dadas las construcciones de los egipcios parece evidente que disponían de reglas empíricas sobre la naturaleza de los materiales, más tarde griegos y romanos avanzaron en el cam ... El …

    sevilla Repository record

  12. Estudo comparativo de formulações alternativas do método dos elementos de contorno para elasticidade bidimensional

    Neitzel, Beatris Maria teixeiraUniversidade Federal do Rio de Janeiro1991

    … to the Boundary Element Method was made for two-dimensional elasticity problems. The direct Boundary Element Method, indirect Boundary Element Method, Superposition Method and the Displacement Discontinuity Method were compared through computacional tests applied at internal and …

    brazil-uerj Repository record

  13. Formulação p. adaptativa do método dos elementos de contorno aplicado a problemas de potencial

    Willmersdorf, Ramiro BritoUniversidade Federal do Rio de Janeiro1988

    This work is concerned with the development of the p-adaptive version of the boundary element method applied to bidimensional steady state potential problems. In the p version of automatic refinement, hierarquical shape functions are selectively inserted in the discretization, complying with error …

    brazil-uerj Repository record

  14. Análise elástica bidimensional de problemas com simetria cíclica pelo método dos elementos de contorno

    Ritt, HumbertoUniversidade Federal do Rio de Janeiro1989

    … have the same behaviour. The concept of double node is also employed in order to remove the discontinuity of the outward normal vector or of the boundary variables. Singular integrals are carried out numerically with the use of a cubic transformation of the coordinates. The program developed also …

    brazil-uerj Repository record

  15. MEC3DE - um programa para análise elástica tridimensional com o método dos elementos de contorno

    Silva, José Jéferson do RêgoUniversidade Federal do Rio de Janeiro1989

    This work deals with linear elastic analysis of three-dimensional problems using the boundary element method coupled with the fundamental solution due to Kelvin. The computer program developed allows for triangular and quadrilateral elements, with constant, linear and quadratic interpolation. In …

    brazil-uerj Repository record

  16. Análise da torção elastoplástica de sólidos de revolução pelo método dos elementos de contorno

    Carrer, José Antonio MarquesUniversidade Federal do Rio de Janeiro1987

    … torsion of solids of revolution. The problem under consideration is tri-dimensional; however, due to its axisymetric nature, it may be treated as a bi-dimensional one, with the analysis being made in the r-z plane of the cylindrical coordinate system (r; θ; z). Furthermore, its equations are …

    brazil-uerj Repository record

  17. Cálculo de sensibilidades: uma aplicação do método dos elementos de contorno à otimização de forma

    Barra, Luis Paulo da SilvaUniversidade Federal do Rio de Janeiro1990

    This work aims at the development of shape sensitivity analysis with the application of the Boundary Element Method (B.E.M.) and its use in the shape design optimization. A shape sensitivity procedure is developed in wich the standard discretized version of the boundary integral equation is …

    brazil-uerj Repository record

  18. Um esquema eficiente para a análise dinâmica transiente com o método dos elementos de contorno

    Silva Junior, Waldyr de Lima eUniversidade Federal do Rio de Janeiro1989

    … economy are remarkable, making the procedure developed worthwile to be implemented. Comparison of results obtained employing the aforementioned truncating schemes with those obtained from the non-truncated version was made for three numerical examples, and confirmed the efficiency of the …

    brazil-uerj Repository record

  19. Análise de problemas não lineares de transferência de calor pelo método dos elementos de contorno

    Azevedo, José Paulo Soares deUniversidade Federal do Rio de Janeiro1985

    … method (B.E.M.); non linearities here considered refer to the temperature dependence of the conductivity and to the non-linear boundary and interface conditions. The B.E.M. is employed together with the Kirchhoff transform. By introducing the integral of conductivity as a new variable, the …

    brazil-uerj Repository record

  20. Implementação do método dos elementos de contorno para elasticidade bidimensional com o uso de microcomputadores

    Santiago, José Antonio FontesUniversidade Federal do Rio de Janeiro1987

    This work is concerned with the development of a computer program for linear elastic analysis of 2-D plane stress/strain problems using Boundary element method. The fundamental solution due to Kelvin is employed. Four different types of linear isoparametric elements have been implemented for the …

    brazil-uerj Repository record

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