Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stochastic stability of an aeroelastic harvester contaminated by wind turbulence and uncertain aeroelastic loads
https://orcid.org/0000-0002-4783-2600
Abstract The study describes the extension of a recently developed model that examines the stochastic stability of a torsional-flutter-based harvester. The new, extended model accounts for both uncertainty in the aeroelastic loads and wind turbulence effects. The first uncertainty source is a byproduct of the modelling simplifications of the aeroelastic loads, which are described by indicial function approach and ideally applicable to two-dimensional flow. The second source is the flow turbulence that operates by modifying the load through parametric, stochastic perturbations that are applied to the term describing the memory-effect of the load; stochastic perturbations simulate imperfections in the load assessment (e.g., measurement errors). Furthermore, since the “blade-airfoil” used for energy harvesting has finite dimensions, three-dimensional flow effect is simulated through a load reduction parameter applied to the static lift slope, dependent on the aspect ratio of the apparatus; this reduction parameter also leads to approximations and stochastic perturbations. Mean square stochastic flutter stability is examined. Post-critical states are discussed.
Highlights The stochastic dynamics of a torsional-flutter-based wind energy harvester is examined. Both wind turbulence and aeroelastic load random perturbations are included in the formulation. A state-space model is derived to simulate dynamic response and energy transfer. The model is used to study coupled electro-mechanical response and mean square stability.
Stochastic stability of an aeroelastic harvester contaminated by wind turbulence and uncertain aeroelastic loads
https://orcid.org/0000-0002-4783-2600
Abstract The study describes the extension of a recently developed model that examines the stochastic stability of a torsional-flutter-based harvester. The new, extended model accounts for both uncertainty in the aeroelastic loads and wind turbulence effects. The first uncertainty source is a byproduct of the modelling simplifications of the aeroelastic loads, which are described by indicial function approach and ideally applicable to two-dimensional flow. The second source is the flow turbulence that operates by modifying the load through parametric, stochastic perturbations that are applied to the term describing the memory-effect of the load; stochastic perturbations simulate imperfections in the load assessment (e.g., measurement errors). Furthermore, since the “blade-airfoil” used for energy harvesting has finite dimensions, three-dimensional flow effect is simulated through a load reduction parameter applied to the static lift slope, dependent on the aspect ratio of the apparatus; this reduction parameter also leads to approximations and stochastic perturbations. Mean square stochastic flutter stability is examined. Post-critical states are discussed.
Highlights The stochastic dynamics of a torsional-flutter-based wind energy harvester is examined. Both wind turbulence and aeroelastic load random perturbations are included in the formulation. A state-space model is derived to simulate dynamic response and energy transfer. The model is used to study coupled electro-mechanical response and mean square stability.
Stochastic stability of an aeroelastic harvester contaminated by wind turbulence and uncertain aeroelastic loads
https://orcid.org/0000-0002-4783-2600
Abstract The study describes the extension of a recently developed model that examines the stochastic stability of a torsional-flutter-based harvester. The new, extended model accounts for both uncertainty in the aeroelastic loads and wind turbulence effects. The first uncertainty source is a byproduct of the modelling simplifications of the aeroelastic loads, which are described by indicial function approach and ideally applicable to two-dimensional flow. The second source is the flow turbulence that operates by modifying the load through parametric, stochastic perturbations that are applied to the term describing the memory-effect of the load; stochastic perturbations simulate imperfections in the load assessment (e.g., measurement errors). Furthermore, since the “blade-airfoil” used for energy harvesting has finite dimensions, three-dimensional flow effect is simulated through a load reduction parameter applied to the static lift slope, dependent on the aspect ratio of the apparatus; this reduction parameter also leads to approximations and stochastic perturbations. Mean square stochastic flutter stability is examined. Post-critical states are discussed.
Highlights The stochastic dynamics of a torsional-flutter-based wind energy harvester is examined. Both wind turbulence and aeroelastic load random perturbations are included in the formulation. A state-space model is derived to simulate dynamic response and energy transfer. The model is used to study coupled electro-mechanical response and mean square stability.
Stochastic stability of an aeroelastic harvester contaminated by wind turbulence and uncertain aeroelastic loads
Caracoglia, Luca (Autor:in)
17.06.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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