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Parametric variation of a coupled pendulum-oscillator system using real-time dynamic substructuring
Authors
Acheson
Agrawal
+42 more
Ashwin
Berlioz
Blakeborough
Bursi
Cartmell
Chu
Cicek
Cuvalci
Cuvalci
Darby
Darby
Donea
Fatimah
Friwell
Gatulli
Gawthrop
Gawthrop
Gilsinn
Gonzalez-Buelga
Goodwin
Harlim
Horiuchi
Kyrychko
Macdonald
Magonette
McGreevy
Mosqueda
Nakashima
Nakashima
Neild
Pinto
Shing
Soong
Svoboda
Thewalt
Thompson
Tondl
Wagg
Wallace
Wallace
Williams
Zhu
Publication date
1 January 2007
Publisher
'Wiley'
Doi
Cite
Abstract
In this paper, we present results from real-time dynamic substructuring tests used to model the dynamics of a coupled pendulum–oscillator system. The substructuring technique is particularly suitable for systems where the nonlinear and linear parts of the system can be separated. The nonlinear part is built full size and tested physically (the substructure) while the linear part is simulated numerically. Then, in order to replicate the dynamics of the complete system the substructure and the numerical model must be coupled in real time. In this study, we demonstrate how real-time dynamic substructure testing can be used to model systems with strongly nonlinear behaviour using parametric variation. We show that the substructuring results give good qualitative and quantitative agreement with purely numerical simulations of the complete system for a range of parameters values. This includes single parameter bifurcation diagrams, some of which cannot be obtained from a full physical experiment. We also briefly discuss the effects of delay and noise on the stability of the substructured system, and how these effects can be mitigated. Copyright © 2006 John Wiley & Sons, Ltd
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