Results 261 to 270 of about 93,288 (302)

Parametric resonance in unsteady watertable flow

Journal of Fluid Mechanics, 2015
The stability of unsteady open-channel flow down an inclined plane is studied using an iterative approach based on the direct and adjoint stability equations combined with a physically justified energy measure. An efficient parametric resonance mechanism has been identified between the exogenous base-flow oscillations and the intrinsic frequencies of ...
CAMPOREALE, CARLO VINCENZO, P.e.t.e.r. .J. Schmid   +1 more
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On the parametric resonance density

Journal of Applied Mathematics and Mechanics, 1980
Abstract The relation between the asymptotic density of the eigenfrequencies of elastic systems and their reactions to parametric vibrational effects is examined. Main attention is paid to the relationship between the density of simple parametric resonances at which one of the eigenmodes of the system is mostly excited, and the density of the ...
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Parametric Resonances of Columns

2019
This chapter aims to give a general overview of the parametric resonances of columns under a harmonically pulsating force. In addition to simple resonance, combination resonances of sum and difference type are introduced, with columns having various kinds of boundary condition, other than pinned-pinned ends.
Yoshihiko Sugiyama, Mikael A. Langthjem, Kazuo Katayama   +2 more
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The First Parametric Resonance

2017
Linear periodically nonstationary systems are described by linear differential equations with either one or several periodically variable coefficients. In contrast to the coordinates, that describe the motion of the system, the periodically variable coefficients are called periodically variable parameters.
Leonid Chechurin, Sergej Chechurin
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Parametric vibrations and resonance

2003
Summary: We examine a system of linear differential equations with periodic coefficients depending on parameters. For small changing parameters, the monodromy matrix and eigenvalues are constructed. We consider the problem of stability of trivial solution of the damped Hill equation and obtain the domains of stability in the parameter space.
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Parametric Resonance

2023
Hildeberto E. Cabral, Lúcia Brandão Dias   +1 more
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Damping by Parametric Stiffness Excitation: Resonance and Anti-Resonance

Journal of Vibration and Control, 2008
Investigations are presented into the stability of vibration suppression employing variable-stiffness actuators. Systems with an arbitrary number of degrees of freedom are considered, and are subject to both parametric excitation and self-excitation.
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RESONANT LAYERS IN A PARAMETRICALLY EXCITED PENDULUM

International Journal of Bifurcation and Chaos, 2002
The energy increment spectrum method is developed for the numerical prediction of a specific primary resonant layer, and the width of the resonant layer can be estimated through the energy increment spectrum. This numerical approach is applied to investigate the (2M:1)-librational and (M:1)-rotational, resonant layers in a parametrically excited ...
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Graviton to photon conversion via parametric resonance

Physics of the Dark Universe, 2023
Robert Brandenberger, Paola C M Delgado, Alexander Ganz   +2 more
exaly  

Stochastic Parametric Resonance

2017
As the first example, consider in more detail stochastic equation of the second order ( 2.3), which is equivalent to the system of equations of the first order.
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