Laplace Transform
Mostrando 1-12 de 45 artigos, teses e dissertações.
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1. Integral Representations of Mittag-Leffler Function on the Positive Real Axis
RESUMO Através do método para encontrar a transformada de Laplace inversa sem o uso de um contorno de integração no plano complexo, mostramos que a função de Mittag-Leffler de três parêmetros, que aparece em muitos problemas associados com cálculo fracionário, possui representações integrais similares no semieixo real positivo. Algumas delas são
TEMA (São Carlos). Publicado em: 16/09/2019
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2. Escoamento de Calor Representado pela Equação de Laplace e a Transformada de Fourier em Seno e Cosseno
RESUMO Nesse artigo a equação de Laplace foi utilizada para representar uma distribuição de temperaturas estacionárias no primeiro quadrante no plano cartesiano com diferentes condições de fronteira, tendo sido examinada com detalhes, a luz da transformada de Fourier em seno e cosseno. Após obter a solução formal para cada exemplo, foi possível, u
TEMA (São Carlos). Publicado em: 10/06/2019
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3. Nondestructive ultrasonic testing in rod structure with a novel numerical Laplace based wavelet finite element method
Abstract Rod structure has been widely used in aerospace engineering and civil engineering. Nondestructive testing is a very important method applied to detect unseen flaws in structures, ultrasonic wave nondestructive testing has been used in many areas. Finite Element Method is one of the most widely used numerical methods but would have a high cost when d
Lat. Am. j. solids struct.. Publicado em: 16/07/2018
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4. Different Numerical Inversion Algorithms of the Laplace Transform for the Solution of the Advection-Diffusion Equation with Non-local Closure in Air Pollution Modeling
RESUMO Neste trabalho apresenta-se a resolução da equação de advecção-difusão tridimensional estacionária obtida através da técnica GIADMT (Generalized Integral Advection Diffusion Multilayer Technique), considerando o fechamento não-local linear para o fluxo turbulento. Foram consideradas duas parametrizações diferentes para o coeficiente do te
TEMA (São Carlos). Publicado em: 2018-01
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5. Modeling of Variable Lamé's Modulii for a FGM Generalized Thermoelastic Half Space
Abstract In this work we consider a problem in the context of the generalized theory of thermoelasticity for a half space. The material of the half space is functionally graded in which Lamé's modulii are functions of the vertical distance from the surface of the medium. The surface is traction free and subjected to a time dependent thermal shock. The probl
Lat. Am. j. solids struct.. Publicado em: 2016-04
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6. An Analytic Model for Dispersion of Rocket Exhaust Clouds: Specifications and Analysis in Different Atmospheric Stability Conditions
ABSTRACT: This paper brings the first results concerning a new analytic model to evaluate atmospheric dispersion in rocket launch scenarios, namely Generalized Integral Laplace Transform Technique for Rocket effluent dispersion model. The model is constituted by three different modules, being two pre-processors (micrometeorological parameters and deposition
J. Aerosp. Technol. Manag.. Publicado em: 2015-09
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7. Thermoelastic interactions in an isotropic unbounded medium due to moving heat source using GNIII model
AbstractIn this work, we study a problem of thermoelastic interaction due to moving heat source in an isotropic infinite medium under Green and Naghdi model of type III (GNIII). The form of vector-matrix differential equation in the Laplace transform domain, the basic equations have been written, which is then solved by an eigenvalue technique. The analytica
Lat. Am. j. solids struct.. Publicado em: 2015-06
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8. Vibration of gold nano beam in context of two-temperature generalized thermoelasticity subjected to laser pulse
In the present work, the model of vibration of gold nano- beam induced by laser pulse heating is developed in the context of two-temperature generalized thermoelasticity and non-Fourier heat conduction. The analytic solution has been derived in the Laplace transform domain. The inverse Laplace transform has been calculated numerically and the numerical resul
Lat. Am. j. solids struct.. Publicado em: 2014
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9. General exact harmonic analysis of in-plane timoshenko beam structures
The exact solution for the problem of damped, steady state response, of in-plane Timoshenko frames subjected to harmonically time varying external forces is here described. The solution is obtained by using the classical dynamic stiffness matrix (DSM), which is non-linear and transcendental in respect to the excitation frequency, and by performing the harmon
Lat. Am. j. solids struct.. Publicado em: 2014
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10. Solution of hyperbolic bioheat transfer problems by numerical green's functions: the ExGA-linear θ method
This paper presents a time-domain formulation called Explicit Green's approach (ExGA) linear θ method for the solution of the bioheat equation. Starting from the hyperbolic bioheat equation, which includes the parabolic one as a special case, the linear method is incorporated into the standard ExGA time marching scheme. The numerical Green's function is fir
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-12
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11. New analytical approach to nonlinear behavior study of asymmetrically LCBs on nonlinear elastic foundation under steady axial and thermal loading
In this paper, nonlinear behavior analysis of an asymmetrically laminated composite beam (LCB) on nonlinear foundation under axial and in-plane thermal loading is considered. To solve the obtained governing equation, a novel method based on Laplace transform is used. The resulted approximate analytical solution allows us the parametric study of different par
Lat. Am. j. solids struct.. Publicado em: 2012-10
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12. Evaluation of radiances generated by solving the radiative-transfer equation with different approaches
Radiative transfer is the main phenomenon in the basis of several relevant problems of scientific and technological interest. Examples of application of the mathematical and computational modeling of such phenomenon can be found in astronomy, environmental sciences, engineering and medicine among many different areas. The integro-differential equation known
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06