Linear And Nonlinear Analysis Methods
Mostrando 1-12 de 119 artigos, teses e dissertações.
-
1. Nonlinear static analysis of a pile-supported wharf
Resumo O objetivo deste artigo é desenvolver uma análise estática não-linear através de um estudo de caso de um cais sobre estacas situado em uma nova área portuária para petroleiras. A atividade sísmica da área é muito intensa com uma aceleração máxima do solo de 0.55 g. Por esta razão, é muito importante analisar o comportamento estrutural n
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
-
2. Uma abordagem experimental e numérica para determinação de curvas de compressão para concreto simples e reforçados com fibras de aço
RESUMO A curva tensão-deformação do concreto é importante para o dimensionamento de estruturas, pois por meio dela é possível obter sua resistência à compressão, sua deformação de pico, o módulo de elasticidade e a tenacidade do concreto. Entretanto, essa é uma propriedade que não é comumente determinada nos ensaios de controle de qualidade do
Matéria (Rio J.). Publicado em: 16/09/2019
-
3. Comparison and Combination of Techniques for Determining the Parameters of a Magnetic Hysteresis Model
Abstract The Jiles-Atherton scalar hysteresis model presents five parameters used to represent the material tested and used to calculate the magnetic losses. This article presents a comparative analysis of the performance of two methods of identifying these parameters. In the first method, the equations of Jiles-Atherton were assembled into a single non-line
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 12/09/2019
-
4. Interaction structures in the psychodynamic psychotherapy of a patient with chronic diseases and somatic symptoms
Resumo Objetivo Este estudo objetivou identificar e analisar as estruturas de interação (interaction structures [ISs]) (padrões de interação recíproca entre a dupla paciente-terapeuta) que caracterizam o processo de uma psicoterapia psicodinâmica de longa duração (28 meses) de uma paciente com doenças crônicas (lúpus e fibromialgia) e sintomas
Trends Psychiatry Psychother.. Publicado em: 10/07/2019
-
5. An efficient general curvilinear coordinates finite element method for the linear dynamic study of thickness-independent shells
Abstract yyTo date, a large number of finite element methods have been developed to study the dynamics of shell structures. Most of them are generally based on the degenerated solid approach and other less in shell theories, but introducing, in this last case, some assumptions to analyze this problem: some of them refer to shallow shells (slightly curved she
Lat. Am. j. solids struct.. Publicado em: 27/06/2019
-
6. Prediction of 3D ground reaction forces during gait based on accelerometer data
Abstract Introduction The aim of this study was to predict 3D ground reaction force signals based on accelerometer data during gait, using a feed-forward neural network (MLP). Methods Seventeen healthy subjects were instructed to walk at a self-selected speed with a 3D accelerometer attached to the distal and anterior part of the shank. A force plate was
Res. Biomed. Eng.. Publicado em: 21/09/2018
-
7. Effects of resistance training protocols on nonlinear analysis of heart rate variability in metabolic syndrome
Despite the various standard non-linear measurements used in autonomic modulation (AM) assessments usually being applied to long time-series, such analyses can sometimes be applied to shorter term series. To overcome this disadvantage, chaotic global methods were formulated by putting together heart rate variability (HRV) linear methods. Chaos provides infor
Braz J Med Biol Res. Publicado em: 11/06/2018
-
8. Ultra-short-term heart rate variability during resistance exercise in the elderly
Despite the appeal of ultra-short-term heart rate variability (HRV) methods of analysis applied in the clinical and research settings, the number of studies that have investigated HRV by analyzing R-R interval (RRi) recordings shorter than 5 min is still limited. Moreover, ultra-short-term HRV analysis has not been extensively validated during exercise and,
Braz J Med Biol Res. Publicado em: 21/05/2018
-
9. Analysis of Geometrically Nonlinear Vibrations of Functionally Graded Shallow Shells of a Complex Shape
Abstract Geometrically nonlinear vibrations of functionally graded shallow shells of complex planform are studied. The paper deals with a power-law distribution of the volume fraction of ceramics and metal through the thickness. The analysis is performed with the use of the R-functions theory and variational Ritz method. Moreover, the Bubnov-Galerkin and the
Lat. Am. j. solids struct.. Publicado em: 2017-09
-
10. Numerical Modeling of Corrosion Effectson Ultimate Strength of DX Tubular Joints
Abstract This article presents the results of numerical investigation on modeling buckling behavior and ultimate strength of corroded multi-planar tubular joints. Finite element method was used in order to simulate the behavior of DX multi-planar tubular joints under axial compressive loading. Three different patterns were chosen for corrosion modeling. Also
Lat. Am. j. solids struct.. Publicado em: 2017-02
-
11. Thermal Distortion Analysis of Inflatable Antenna Structures Considering Inflation Gas
ABSTRACT This paper addresses the static distortion and stress analysis of inflatable antenna structures subjected to a thermal load, which is a very important type of load experienced by such structures during service in orbit. Non-linear finite element analysis methods for inflatable structures were formulized, and the thermal stress of thin films was cons
J. Aerosp. Technol. Manag.. Publicado em: 2016-12
-
12. Classification System for Semi-Rigid Beam-to-Column Connections
Abstract The current study attempts to recognise an adequate classification for a semi-rigid beam-to-column connection by investigating strength, stiffness and ductility. For this purpose, an experimental test was carried out to investigate the moment-rotation (M-θ) features of flush end-plate (FEP) connections including variable parameters like size and nu
Lat. Am. j. solids struct.. Publicado em: 2016-11