Buscar
Mostrando ítems 51-60 de 328
Wave damping of a sloshing wave by an interacting turbulent vortex flow
(American Physical Society, 2020)
We report on the enhancement of the hydrodynamic damping of gravity waves at the surface of a fluid layer as they interact with a turbulent vortex flow in a sloshing experiment. Gravity surface waves are excited by oscillating ...
Avaliação do dano por choque térmico em concretos refratários via espectroscopia acústica ressonante não-linear
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM, 2012-03-02)
In this thesis the Non-linear Resonant Acoustic Spectroscopy Technique used to evaluate the mesoscopic non-linearity was incorporated into the Impulse Excitation Technique, which is extensively applied to the evaluation ...
Avaliação do comportamento de sistemas estruturais de linhas de transmissão submetidos à ação do vento
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ESTRUTURASPrograma de Pós-Graduação em Engenharia de EstruturasUFMG, 2019-03-01)
This work presents an evaluation of the structural behavior of transmission lines (TL’s) subjected to non-deterministic dynamic wind loading on the cables, considering aerodynamic damping and geometric nonlinearity. The ...
Coupled axial/torsional vibrations of drill-strings by means of non-linear model
(Pergamon-Elsevier Science Ltd, 2007-07)
In the present work a geometrically non-linear model is presented to study the coupling of axial and torsional vibrations on a drill-string, which is described as a vertical slender beam under axial rotation. It is known ...
Controlling dissociation by trapping trajectories in highly energetic states
(2016-05-01)
We consider the non-linear dynamics of a polar diatomic molecule under the action of laser-field interactions and in the presence of a dissipation mechanism, described by the classical damped and driven one-dimensional ...
Estabilidade uniforme para sistemas com amortecimento viscoelástico
(Programa de Pós-Graduação em MatemáticaCentro de Ciências Exatas, 2022)
IDA-PBC controller design for grid connected Front End Converters under non-ideal grid conditions
(Elsevier Science Sa, 2017-01)
A passivity-based non-linear controller design for three-phase front-end converters used to connect renewable energy sources to the grid is proposed in this paper. The control objective is to inject all the generated power ...
Hunting down systematics in baryon acoustic oscillations after cosmic high noon
(Wiley Blackwell Publishing, Inc, 2016-02)
Future dark energy experiments will require accurate theoretical predictions for the baryon acoustic oscillations (BAOs). Here, we use large N-body simulations to study any systematic shifts and damping in BAO due to ...