scholarly journals Nonlinear dynamical response of interacting bosons to synthetic electric field

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Arko Roy ◽  
Soumya Bera ◽  
Kush Saha
Keyword(s):  
Electric Field ◽  
Dynamical Response ◽  
Nonlinear Dynamical

Using recurrence plots for the analysis of the nonlinear dynamical response of iron passivation-corrosion processes

2018 ◽  
Vol 28 (8) ◽  
pp. 085708 ◽  
Author(s):  
Dimitrios Valavanis ◽  
Dimitra Spanoudaki ◽  
Chrysanthi Gkili ◽  
Dimitra Sazou
Keyword(s):  
Dynamical Response ◽  
Recurrence Plots ◽  
Nonlinear Dynamical

A Parametrically Broadband Nonlinear Energy Harvester

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Tanju Yildirim ◽  
Mergen H. Ghayesh ◽  
Thomas Searle ◽  
Weihua Li ◽  
Gursel Alici
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Nonlinear Response ◽  
Energy Harvester ◽  
Shaking Table ◽  
Experimental Investigations ◽  
Dynamical Response ◽  
Parametrically Excited ◽  
Nonlinear Dynamical ◽  
Electrodynamic Shaker

In this work, for the first time, an energy harvester based on the nonlinear dynamical response of a parametrically excited cantilever beam in contact with mechanical stoppers has been fabricated and tested; a 145% increase in the bandwidth at which energy can be effectively harvested has been observed. Experimental and theoretical investigations have been performed in order to assess the increased operating bandwidth of the energy harvester fabricated; for the experimental investigations, an electrodynamic shaker connected to a shaking table has been used to parametrically stimulate the energy harvesting device. Results showed that the parametric energy harvester without stoppers displayed a weak softening-type nonlinear response; however, with the addition of mechanical stoppers the energy harvester displayed a strong hardening-type nonlinear response which is ideal for capturing kinetic energy over larger bandwidths. The addition of mechanical stoppers on a parametrically excited cantilever beam has significant qualitative and quantitative effects on the nonlinear parametric energy harvesting; the energy harvesting bandwidth was increased in the range of 35–145% by adjusting the stoppers.

Nonlinear Dynamics of Aeroelastic Systems

2000 ◽  
Author(s):  
Earl H. Dowell
Keyword(s):  
Wind Tunnel ◽  
Delta Wing ◽  
Free Play ◽  
Physical Models ◽  
Forced Oscillations ◽  
Control Surface ◽  
Dynamical Response ◽  
Wind Tunnel Experiments ◽  
Nonlinear Dynamical ◽  
Flight Regimes

Abstract Aeroelastic systems are those that involve the coupled interaction between a convecting fluid and a flexible elastic structure. The nonlinear dynamical response of such systems is of great current interest. Existing aircraft are known to encounter limit cycle oscillations (LCO) in certain flight regimes, and relatively simple experimental wind tunnel models have been designed to exhibit LCO as well. In the present paper, the results of these wind tunnel experiments are discussed and compared to comparable results from mathematical models. The physical models include (1) an airfoil and a control surface attached with an elastic spring including free-play and (2) a delta wing with elastic geometrical nonlinearities due to bending and torsional deformations. Both self-excited oscillations such as flutter and LCO, as well as forced oscillations due to an aerodynamic gust, are discussed. The advantages of representing the unsteady aerodynamic flow field in terms of global modes for such studies are emphasized and illustrated.

scholarly journals A numerical survey of nonlinear dynamical responses of discrete pantographic beams

2021 ◽  
Author(s):  
Emilio Turco
Keyword(s):  
Dynamical Behavior ◽  
Integration Scheme ◽  
Dynamical Response ◽  
Static Case ◽  
Equilibrium Equations ◽  
Response Curves ◽  
Nonlinear Dynamical ◽  
Nonlinear Equilibrium ◽  
Standard Integration ◽  
Inertia Forces

AbstractMaterials and structures based on pantographic cells exhibit interesting mechanical peculiarities. They have been studied prevalently in the static case, both in linear and nonlinear regime. When the dynamical behavior is considered, available literature is scarce probably for the intrinsic difficulties in the solution of this kind of problems. The aim of this work is to contribute to filling of this gap by addressing the dynamical response of pantographic beams. Starting from a simple spring mechanical model for pantographic beams, the nonlinear equilibrium problem is formulated directly for such a discrete system also considering inertia forces. Successively, the solution of the system of equilibrium equations is sought by means of a stepwise strategy based on a non-standard integration scheme. Here, only harmonic excitations are considered and, for large displacements, frequency-response curves are thoroughly discussed for some significant cases.

Transient dynamical responses of a charged binary colloid in an electric field

Soft Matter ◽  
2018 ◽  
Vol 14 (22) ◽  
pp. 4477-4482 ◽  
Author(s):  
Suman Dutta ◽  
J. Chakrabarti
Keyword(s):  
Electric Field ◽  
Brownian Dynamics ◽  
Constant Electric Field ◽  
Model System ◽  
Dynamics Simulation ◽  
Dynamical Response ◽  
Brownian Dynamics Simulation ◽  
Charged Colloids ◽  
Oppositely Charged ◽  
System Approaches

In a model system of oppositely charged colloids we study via Brownian dynamics simulation the dynamical response as the system approaches steady states upon application of a constant electric field.

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