Results 21 to 30 of about 138,017 (338)

Forced harmonic oscillations of the Euler-Bernoulli beam with resistance forces

open access: yesTrudy Odesskogo Politehničeskogo Universiteta, 2015
The important issue in the oscillation theory is the study of resistance impact on oscillatory processes. Unlike the calculations of free oscillations, that reside in determination of natural frequencies and waveshapes and unlike the calculations of ...
Yuriy S. Krutiy
doaj   +1 more source

On the Countering of Free Vibrations by Forcing: Part I—Non-Resonant and Resonant Forcing with Phase Shifts

open access: yesApplied Mechanics, 2022
The question addressed is whether the free oscillations of a continuous system can be suppressed, or at least the total energy reduced, by applying external forces, using as example the linear undamped transverse oscillations of a uniform elastic string.
Luiz M. B. C. Campos, Manuel J. S. Silva
doaj   +1 more source

Forced oscillations of coronal loops driven by external EIT waves [PDF]

open access: yes, 2006
Aims. We study the generation of transversal oscillations in coronal loops represented as a straight thin flux tube under the effect of an external driver modelling the global coronal EIT wave.
I. Ballai   +33 more
core   +3 more sources

General Forced Oscillations in a Real Power Grid Integrated with Large Scale Wind Power

open access: yesEnergies, 2016
According to the monitoring of the wide area measurement system, inter-area oscillations happen more and more frequently in a real power grid of China, which are close to the forced oscillation.
Ping Ju   +4 more
doaj   +1 more source

Forced oscillations of beams on elastic bearings

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2004
We study the existence of weak periodic solutions for certain damped and forced linear beam equations resting on semi-linear elastic bearings. Conditions for the periodic forcing term and semi-linear elastic bearings are derived which ensure either the ...
Michal Fečkan
doaj   +1 more source

The Dynamics of Buoyant Microplastic in the Ocean Forced by Unsteady Insolation

open access: yesJournal of Marine Science and Engineering, 2023
Building on the deterministic mathematical models of Kooi et al. (Environ. Sci. Technol. 51, 2017) and Kreczak et al. (Limnol. Oceanogr. 66, 2021), this study investigates the trajectories of biofouled microplastic particles forced by unsteady insolation.
Hannah Kreczak   +2 more
doaj   +1 more source

Numerical simulation of Faraday waves oscillated by two-frequency forcing [PDF]

open access: yes, 2015
We perform a numerical simulation of Faraday waves forced with two-frequency oscillations using a level-set method with Lagrangian-particle corrections (particle level-set method).
Matsumoto, Takeshi, Takagi, Kentaro
core   +2 more sources

Interaction between nonlinear parametric and forced oscillations

open access: yesVietnam Journal of Mechanics, 1998
None
Nguyen Van Dao   +2 more
doaj   +1 more source

Oscillations in stellar superflares [PDF]

open access: yes, 2015
Two different mechanisms may act to induce quasi-periodic pulsations (QPP) in whole-disk observations of stellar flares. One mechanism may be magneto-hydromagnetic (MHD) forces and other processes acting on flare loops as seen in the Sun.
Balona, L. A.   +5 more
core   +2 more sources

Oscillators: Phenomenological mappings and analogies: First part: Mathematical analogy and chains [PDF]

open access: yesScientific Technical Review, 2015
New analytical and numerical results of dynamics for both linear and nonlinear system with two degrees of freedom are presented. For a mechanical chain system with two degrees of freedom, oscillations are investigated analytically and numerically with ...
Hedrih-Stevanović Katica   +4 more
doaj  

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