Coupled Mode Theory
Mostrando 1-12 de 16 artigos, teses e dissertações.
-
1. Theoretical Study of Plasmonically Induced Transparency Effect in Arrays of Graphene-Based Double Disk Resonators
Abstract In this paper, we consider coupled disk-shaped resonators separated by a thin dielectric substrate that can be used as frequency-tunable filters or as electromagnetic switches in the terahertz frequency band. The two disks are electromagnetically coupled and resonate with dipole plasmonic modes. By using a Temporal Coupled-Mode Theory based approach
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2019-03
-
2. Normal Mode Analysis to a Poroelastic Half-Space Problem under Generalized Thermoelasticity
Abstract The thermo-hydro-mechanical problems associated with a poroelastic half-space soil medium with variable properties under generalized thermoelasticity theory were investigated in this study. By remaining faithful to Biot’s theory of dynamic poroelasticity, we idealized the foundation material as a uniform, fully saturated, poroelastic half-space me
Lat. Am. j. solids struct.. Publicado em: 2017-06
-
3. Two-Dimensional Fractional Order Generalized Thermoelastic Porous Material
AbstractIn the work, a two-dimensional problem of a porous material is considered within the context of the fractional order generalized thermoelasticity theory with one relaxation time. The medium is assumed initially quiescent for a thermoelastic half space whose surface is traction free and has a constant heat flux. The normal mode analysis and eigenvalue
Lat. Am. j. solids struct.. Publicado em: 2015-07
-
4. Thermo-mechanical vibration analysis of annular and circular graphene sheet embedded in an elastic medium
In this study, the vibration behavior of annular and circular graphene sheet coupled with temperature change and under in-plane pre-stressed is studied. Influence of the surrounding elastic medium 011 the fundamental frequencies of the single-layered graphene sheets (SLGSs) is investigated. Both Winkler-type and Pasternak- type models are employed to simulat
Lat. Am. j. solids struct.. Publicado em: 2014-08
-
5. An efficient coupled polynomial interpolation scheme for shear mode sandwich beam finite element
An efficient piezoelectric sandwich beam finite element is presented here. It employs the coupled polynomial field interpolation scheme for field variables which incorporates electromechanical coupling at interpolation level itself; unlike conventional sandwich beam theory (SBT) based formulations available in the literature. A variational formulation is use
Lat. Am. j. solids struct.. Publicado em: 2014
-
6. Nonlocal continuum mechanics formulation for axial, flexural, shear and contraction coupled wave propagation in single walled carbon nanotubes
This paper presents the effect of nonlocal scaling parameter on the coupled i.e., axial, flexural, shear and contraction, wave propagation in single-walled carbon nanotubes (SWCNTs). The axial and transverse motion of SWCNT is modeled based on first order shear deformation theory (FSDT) and thickness contraction. The governing equations are derived based on
Lat. Am. j. solids struct.. Publicado em: 2012-08
-
7. Mode localization of modular prestressed plate panels. / Localização de modos de vibração em painéis modulados de lajes protendidas.
In this research, the phenomenon of vibration modes localization in nearly periodic modular structures of linear and nonlinear behavior is studied. Of special interest is an application in Civil Engineering, lightly coupled periodic plate panels with small imperfections, mainly submitted to the variation of membrane forces introduced by prestress forces, whi
Publicado em: 2009
-
8. DYNAMIC ANALYSIS OF HYPERLASTIC CIRCULAR MEMBRANES / ANÁLISE DINÂMICA DE MEMBRANAS CIRCULARES HIPERELÁSTICAS
This work presents an analysis of the nonlinear vibration response of a prestretched hyperelastic circular membrane subjected to finite deformations. The membrane material is assumed to be isotropic, homogeneous and neo-Hookean. Based on the theory of finite deformations for hyperelastic membranes, a variational formulation is developed. First the exact solu
Publicado em: 2009
-
9. Quantum entanglement between atoms located in distinct cavities / Emaranhamento quantico entre atomos localizados em cavidades distintas
In this work, we study the dynamics of the entanglement between two remote atoms in distinct cavities. The main focus is the production of maximal entangled states between identical atoms of two levels in distinct cavities and, in particular, coupled cavities. Initially we present the main concepts of the Theory of Quantum Information, qualitative and quanti
Publicado em: 2007
-
10. Damage detection in complex structures using Component Mode Synthesis and Ritz vectors / Detecção de falhas em estruturas complexas usando sintese modal dos componentes e vetores de Ritz
This work explores the use of Component Mode Synthesis methods (CMS), Minimum Rank Perturbation Theory (MRPT), and Ritz Realization AIgorithm (RRA) as a structural damage detection tooI. The CMS consists in to modeling individual components of a structure separately and then to couple them to form an assembled system. CMS methods can be generalized to allow
Publicado em: 2001
-
11. Ordem e caos em plasmas magnetizados
The objective of this thesis is to present a clear understanding of some important nonlinear phenomena that are common in space and laboratory plasmas. Specifically,the present analytical and numerical studies have focused on the properties of electromagnetic turbulence as well as associated coherent structures and chaotic behaviors in a multi-component magn
Publicado em: 1999
-
12. Optimal conception of coupled internal elasto-acoustics systems / Concepção otima de sistemas elasto-acusticos interiores acoplados
Neste trabalho desenvolveram-se metodologias para a obtenção de formas ótimas em sistemas vibroacústicos acoplados, via mudança de parâmetros geométricos, usando a análise de sensibilidade e ferramentas de programação não linear. As equações matriciais do problema são determinadas com o método dos elementos finitos, e expostas de forma a se to
Publicado em: 1998