Newton Raphson
Mostrando 1-12 de 145 artigos, teses e dissertações.
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1. Código Computacional Avançado para Análise de Fenômenos Físicos de Campo Escalar da Engenharia
RESUMO As equações diferenciais governam inúmeros fenômenos físicos presentes em diversos campos de conhecimento da física-matemática. Uma vez que os modelos são compreendidos pela teoria de campo escalar, possibilitam a descrição de uma gama de aplicações práticas da engenharia, transitando de problemas na área da acústica, térmica, mecânic
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. Optimization of geometrically nonlinear truss structures under dynamic loading
Abstract The goal of this article is to present the formulation of the optimization problem of truss structures with geometric nonlinearity under dynamic loads and provide examples of this problem. The formulated optimization problem aims to determine the cross-sectional area of the bars that minimizes the weight of the structure, imposing constraints on nod
REM, Int. Eng. J.. Publicado em: 2020-09
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3. Large Displacement Static Analysis of Composite Elliptic Panels of Revolution having Variable Thickness and Resting on Winkler-Pasternak Elastic Foundation
Abstract Nonlinear static response of laminated composite Elliptic Panels of Revolution Structure(s) (EPRS) having variable thickness resting on Winkler-Pasternak (W-P) Elastic Foundation is investigated in this article. Generalized Differential Quadrature (GDQ) method is utilized to obtain the numerical solution of EPRS. The first-order shear deformation th
Lat. Am. j. solids struct.. Publicado em: 20/12/2019
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4. NUMERICAL AND COMPUTATIONAL ASPECTS OF COSMO-BASED ACTIVITY COEFFICIENT MODELS
ABSTRACT In the present work, some numerical and computational aspects of COSMO-based activity coefficient models were explored. The residual contribution in such models rely on the so called self-consistency equation. This equation does not have a closed-form solution and is usually solved by the successive substitution method. The performance of a classica
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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5. Inelastic second-order analysis of steel columns under minor-axis bending
Abstract The inelastic second-order behavior of steel structural columns under minor-axis bending is presented in this article. To study this behavior, a nonlinear frame element formulation is adopted in which the steel's plasticity process is accompanied at the nodal points of each finite element through the refined plastic-hinge method (RPHM). A tangent mo
REM, Int. Eng. J.. Publicado em: 19/06/2019
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6. An axisymmetric nodal averaged finite element
Abstract A nodal averaging technique which was earlier used for plane strain and three-dimensional problems is extended to include the axisymmetric one. Based on the virtual work principle, an expression for nodal force is found. In turn, a nodal force variation yields a stiffness matrix that proves to be non-symmetrical. But, cumbersome non-symmetrical ter
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
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7. Run time Assessment for Gas Turbine Performance Simulation
ABSTRACT: This article describes the run time characteristics of a gas turbine performance simulation using different solvers and components off-design performance database formats. Two different nonlinear systems of equation solvers, Newton-Raphson's and Broyden's, and two different formats of compressor and turbine off-design performance database (maps), t
J. Aerosp. Technol. Manag.. Publicado em: 15/03/2018
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8. Trusses Nonlinear Problems Solution with Numerical Methods of Cubic Convergence Order
RESUMO Grande parte dos procedimentos numéricos para obter a trajetória de equilíbrio ou curva força-deslocamento de problemas estruturais com comportamento não-linear é baseado no esquema iterativo de Newton-Raphson ao qual são acoplados métodos de continuação. Este artigo apresenta novos algoritmos fundamentados nos métodos de Potra-Pták, Cheby
TEMA (São Carlos). Publicado em: 2018-01
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9. Transverse permeability determination and influence in resin flow through an orthotropic medium in the RTM process
ABSTRACT Resin Transfer Molding (RTM) process is commonly used to produce high quality polymeric composites with simple or complex geometries in small to large sizes. In RTM process a preformed reinforcement is positioned inside the mold cavity. This dry reinforcement is actually a fibrous porous media whereby resin will flow. The mold is then closed and res
Matéria (Rio J.). Publicado em: 20/07/2017
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10. Distribuição da midrange estudentizada externamente
RESUMO A distribuição da midrange estudentizada externamente foi criada com base nos procedimentos de estudentização de Student e foi inspirada na distribuição da amplitude estudentizada externamente. O amplo uso da amplitude estudentizada externamente em comparações múltiplas também foi uma das motivações para desenvolver esta nova distribuiçã
Ciênc. agrotec.. Publicado em: 2017-07
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11. Análise numérica do comportamento não linear de estruturas mistas de aço e concreto
Resumo O presente trabalho apresenta o desenvolvimento de uma formulação numérica adequada para análise de estruturas mistas de aço e concreto considerando os efeitos da não linearidade geométrica e da inelasticidade dos materiais. Para tal, foi desenvolvida uma metodologia baseada no Método da Rótula Plástica Refinado (MRPR), sendo os coeficientes
Rev. IBRACON Estrut. Mater.. Publicado em: 2017-02
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12. Development of Sliding Connections for Structural Analysis by a Total Lagrangian FEM Formulation
Abstract In this study a total lagrangian 2D finite element formulation is used to model plane frames developing large displacements and rotations considering sliding connections. This kind of connections is usually called prismatic and cylindrical joints. In order to be self-containing, the steps of the development of a frame finite element of any approxima
Lat. Am. j. solids struct.. Publicado em: 2016-11