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A nonlinear model o...
A nonlinear model of vortex-induced forces on an oscillating cylinder in a fluid flow
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- Decuyper, J. (författare)
- Vrije Univ Brussel, Dept Engn Technol INDI, Pl Laan 2, B-1050 Brussels, Belgium.;Vrije Univ Brussel, Thermo & Fluid Dynam FLOW, Pl Laan 2, B-1050 Brussels, Belgium.
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- De Troyer, T. (författare)
- Vrije Univ Brussel, Dept Engn Technol INDI, Pl Laan 2, B-1050 Brussels, Belgium.;Vrije Univ Brussel, Thermo & Fluid Dynam FLOW, Pl Laan 2, B-1050 Brussels, Belgium.
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- Tiels, K. (författare)
- Uppsala universitet,Institutionen för informationsteknologi
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- Schoukens, J. (författare)
- Vrije Univ Brussel, Dept Engn Technol INDI, Pl Laan 2, B-1050 Brussels, Belgium.;Eindhoven Univ Technol TU E, Dept Elect Engn, Eindhoven, Netherlands.
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- Runacres, M. C. (författare)
- Vrije Univ Brussel, Dept Engn Technol INDI, Pl Laan 2, B-1050 Brussels, Belgium.;Vrije Univ Brussel, Thermo & Fluid Dynam FLOW, Pl Laan 2, B-1050 Brussels, Belgium.
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Vrije Univ Brussel, Dept Engn Technol INDI, Pl Laan 2, B-1050 Brussels, Belgium;Vrije Univ Brussel, Thermo & Fluid Dynam FLOW, Pl Laan 2, B-1050 Brussels, Belgium. Institutionen för informationsteknologi (creator_code:org_t)
- ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2020
- 2020
- Engelska.
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Ingår i: Journal of Fluids and Structures. - : ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD. - 0889-9746 .- 1095-8622. ; 96
- Relaterad länk:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A nonlinear model relating the imposed motion of a circular cylinder, submerged in a fluid flow, to the transverse force coefficient is presented. The nonlinear fluid system, featuring vortex shedding patterns, limit cycle oscillations and synchronisation, is studied both for swept sine and multisine excitation. A nonparametric nonlinear distortion analysis (FAST) is used to distinguish odd from even nonlinear behaviour. The information which is obtained from the nonlinear analysis is explicitly used in constructing a nonlinear model of the polynomial nonlinear state-space (PNLSS) type. The latter results in a reduction of the number of parameters and an increased accuracy compared to the generic modelling approach where typically no such information of the nonlinearity is used. The obtained model is able to accurately simulate time series of the transverse force coefficient over a wide range of the frequency-amplitude plane of imposed cylinder motion. (C) 2020 Elsevier Ltd. All rights reserved.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Vortex-induced vibrations
- Forced cylinder oscillations
- System identification
- Signal processing
- Nonlinear black-box modelling
- Polynomial nonlinear state-space model
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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