The prediction of nonlinear responses and active stiffness control of moving slender continua subjected to dynamic loadings in a vertical host structure

Stefan Kaczmarczyk, Philip Picton

Research output: Contribution to journalArticle

Abstract

Slender continua such as long ropes, cables and belts are used as tension and payload-carrying members in various engineering applications. They are deployed in terrestrial mine/underground equipment and high-rise building installations through to tethered offshore tension members, tethered space satellite systems and rotating momentum exchange tethers in Earth’s orbit. The slender continua are inherently non-linear and this leads to large non-linear responses with passages through resonances taking place when the time-varying natural frequencies of the system approach the frequency of the inertial load resulting from the dynamic loadings. In this paper the lateral nonlinear dynamic behaviour of long slender continua moving at speed in a tall host structures is analyzed. The mathematical model comprising nonstationary nonlinear ordinary differential equations is used to describe the dynamic behavior of the system equipped with a multi-modal active stiffness controller. The active control is implemented by an axial motion of the support and results in substantial reduction of the response.
Original languageEnglish
Article number1
Pages (from-to)39-44
Number of pages6
JournalInternational Journal of Acoustics and Vibration
Volume18
Issue number1
DOIs
Publication statusPublished - 1 Mar 2013

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Stiffness
Underground equipment
Tetherlines
Ordinary differential equations
Natural frequencies
Momentum
Cables
Orbits
Earth (planet)
Satellites
Mathematical models
Controllers

Cite this

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