Linear Equations System
Mostrando 13-24 de 193 artigos, teses e dissertações.
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13. Application of nonlocal elasticity and DQM to dynamic analysis of curved nanobeams
In this paper, a new numerical technique, the differential quadrature method (DQM) has been developed for dynamic analysis of the nanobeams in the polar coordinate system. DQ approximation of the required partial derivatives is given by a weighted linear sum of the function values at all grid points. A semicircular arch with small-scale effects is investigat
Lat. Am. j. solids struct.. Publicado em: 2014-10
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14. Relative Motion Guidance, Navigation and Control for Autonomous Orbital Rendezvous
ABSTRACT: In this paper, the dynamics of the relative motion problem in a perturbed orbital environment are exploited based on Gauss' variational equations. The relative coordinate frame (Hill frame) is studied to describe the relative motion. A linear high fidelity model is developed to describe the relative motion. This model takes into account primary gra
J. Aerosp. Technol. Manag.. Publicado em: 2014-09
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15. Study on TVD parameters sensitivity of a crankshaft using multiple scale and state space method considering quadratic and cubic non-linearities
In this paper the effect of quadratic and cubic non-linearities of the system consisting of the crankshaft and torsional vibration damper (TVD) is taken into account. TVD consists of non-linear elastomer material used for controlling the torsional vibration of crankshaft. The method of multiple scales is used to solve the governing equations of the system. M
Lat. Am. j. solids struct.. Publicado em: 2014
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16. Integral transform solution of natural convection in a square cavity with volumetric heat generation
The generalized integral transform technique (GITT) is employed to obtain a hybrid numerical-analytical solution of natural convection in a cavity with volumetric heat generation. The hybrid nature of this approach allows for the establishment of benchmark results in the solution of non-linear partial differential equation systems, including the coupled set
Braz. J. Chem. Eng.. Publicado em: 2013-12
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17. Numerical aspects of direct quadrature-based moment methods for solving the population balance equation
Direct-quadrature generalized moment based methods were analysed in terms of accuracy, computational cost and robustness for the solution of the population balance problems in the [0,∞) and [0,1] domains. The minimum condition number of the coefficient matrix of their linear system of equations was obtained by global optimization. An heuristic scaling rule
Braz. J. Chem. Eng.. Publicado em: 2013-09
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18. Investigation of the heave dynamics of Air Cushion Vehicles (ACV): parametric and chaotic studies
A highly non-linear model for the dynamics behavior of Air Cushion Vehicles (ACV) is presented. In this model the compressible Bernoulli's equation, the Newton's second law of motion, and the nonlinear isentropic relations are used to predict the dynamics behavior of only the vertical response of the ACV in both time and frequency domains. In this paper the
Lat. Am. j. solids struct.. Publicado em: 2013-07
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19. Numerical analysis of phase decomposition in A-B binary alloys using Cahn-Hilliard equations
The analysis of phase decomposition was carried out using the nonlinear and linear Cahn-Hilliard equations in a hypothetical A-B alloy system with a miscibility gap. These equations were solved by the explicit finite difference method assuming a regular solution model. The supersaturated solid solution and decomposed phases were considered to have an fcc str
Mat. Res.. Publicado em: 28/05/2013
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20. Analytical and Mathematical Modeling and Optimization of Fiber Metal Laminates (FMLs) subjected to low-velocity impact via combined response surface regression and zero-One programming
This paper presents analytical and mathematical modeling and optimization of the dynamic behavior of the fiber metal laminates (FMLs) subjected to low-velocity impact. The deflection to thickness (w/h) ratio has been identified through the governing equations of the plate that are solved using the first-order shear deformation theory as well as the Fourier s
Lat. Am. j. solids struct.. Publicado em: 2013-03
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21. Modelagem e simulação da propagação de ondas em barras não homogêneas envolvendo materiais elásticos não lineares. / Numerical simulation of the dynamical response of a nonlinear elástic rod composed by two materials.
O objetivo deste trabalho é tratar da simulação do fenômeno de propagação de ondas em uma haste heterogênea elástico, composta por dois materiais distintos (um linear e um não-linear), cada um deles com a sua própria velocidade de propagação da onda. Na interface entre estes materiais existe uma descontinuidade, um choque estacionário, devido ao
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2012
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22. Um sistema de equações parabólicas de reação-difusão modelando quimiotaxia / A system of parabolic reaction-diffusion equations modeling chemotaxis
Analisamos um sistema não linear parabólico de reação-difusão com duas equações definidas em ]0,T[x ômega , (0
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012
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23. Análise do comportamento eletroaeroelástico de uma seção típica para geração piezelétrica de energia / Electroaeroelastic behavior analysis of a typical section for piezoelectric energy harvesting
Converting aeroelastic vibrations into electricity for low power generation has received growing attention over the past few years. In addition to potential applications for aerospace structures, the goal is to develop alternative and scalable configurations for wind energy harvesting to use in wireless electronic systems. The use of a typical airfoil sectio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012
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24. Kinematic Analysis of the Deployable Truss Structures for Space Applications
Abstract: Deployable structure technology has been used in aerospace and civil engineering structures very popularly. This paper reported on a recent development of numerical approaches for the kinematic analysis of the deployable truss structures. The dynamic equations of the constrained system and the computational procedures were summarized. The driving f
J. Aerosp. Technol. Manag.. Publicado em: 2012-12