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Aeroelastic control of long-span suspension bridges with controllable winglets
- Source :
- Structural Control and Health Monitoring. 23:1417-1441
- Publication Year :
- 2016
- Publisher :
- Hindawi Limited, 2016.
-
Abstract
- Summary The structural-aerodynamic modelling and dynamic stabilization of a three-dimensional suspension bridge model is considered. Our emphasis is on investigating the effectiveness of leading and trailing edge flaps in suppressing aeroelastic instabilities. The East Great Belt Bridge is chosen as a design example, and its aeroelastic limits are computed using both thin aerofoil theory and flutter derivatives. The problem is cast in an efficient reduced size finite element formulation with aerodynamic forces expressed in the Laplace domain by use of a high-fidelity rational function approximation. Circulatory aerodynamic forces are modelled using a feedback loop for every element, and the problem is expressed in a form suitable for implementation of modern control techniques. The structure's full multimodal response is considered, and numerical predictions show very good agreement against experimental data from the literature. In order to account for modelling errors and uncertainties while designing the controller, elements from robust control theory are invoked. The stability and robustness of the bridge when fitted with flaps controlled by optimal and suboptimal H∞ controllers are discussed for varying lengths of control surfaces along the suspended span as the optimum configuration for aerodynamic performance is investigated. Copyright © 2016 John Wiley & Sons, Ltd.
- Subjects :
- Airfoil
Engineering
business.industry
020101 civil engineering
02 engineering and technology
Building and Construction
Aerodynamics
Structural engineering
Aeroelasticity
Finite element method
0201 civil engineering
Aerodynamic force
020303 mechanical engineering & transports
0203 mechanical engineering
Mechanics of Materials
Control theory
Flutter
Robust control
business
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 15452255
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- Structural Control and Health Monitoring
- Accession number :
- edsair.doi...........3e9b505b030c94f59d271aaba44da538