On a submerged wave energy converter with snap-through power take-off

This paper investigates the performance of a bistable snap-through power take-off (PTO) operating inside a submerged wave energy converter (WEC). The equation of motion of the surging WEC is derived in the time domain using the Euler–Lagrange equations. The dynamic response of the WEC in regular wav...

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Main Authors: Wang, Lixian, Tang, Hui, Wu, Yanhua
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/141609
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1416092020-06-09T07:32:31Z On a submerged wave energy converter with snap-through power take-off Wang, Lixian Tang, Hui Wu, Yanhua School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Nonlinear Wave Energy Converter Submerged Cylinder This paper investigates the performance of a bistable snap-through power take-off (PTO) operating inside a submerged wave energy converter (WEC). The equation of motion of the surging WEC is derived in the time domain using the Euler–Lagrange equations. The dynamic response of the WEC in regular waves is studied first. It is found that the wave amplitude has a significant impact on the energy conversion efficiency with the proposed energy extraction mechanism. With larger waves impacting on the WEC, the conversion efficiency of the present nonlinear PTO increases significantly. Three response regimes, i.e. local oscillation, aperiodic snap-through, and periodic snap-through, of the nonlinear PTO system are observed with various wave amplitudes. This nonlinear feature is quite different from the linear PTO mechanism that is independent of the wave amplitude. Further, the dynamic response of the nonlinear WEC subjected to irregular wave sea conditions is investigated. Parametric studies have been carried out to determine the optimum operating conditions of the bistable device in order to maximize the wave energy extraction. The utilization of the snap-through PTO can enhance the efficiency of the WEC over its linear counterpart in irregular waves. 2020-06-09T07:32:31Z 2020-06-09T07:32:31Z 2018 Journal Article Wang, L., Tang, H., & Wu, Y. (2018). On a submerged wave energy converter with snap-through power take-off. Applied Ocean Research, 80, 24-36. doi:10.1016/j.apor.2018.08.005 0141-1187 https://hdl.handle.net/10356/141609 10.1016/j.apor.2018.08.005 2-s2.0-85052538724 80 24 36 en Applied Ocean Research © 2018 Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Nonlinear Wave Energy Converter
Submerged Cylinder
spellingShingle Engineering::Mechanical engineering
Nonlinear Wave Energy Converter
Submerged Cylinder
Wang, Lixian
Tang, Hui
Wu, Yanhua
On a submerged wave energy converter with snap-through power take-off
description This paper investigates the performance of a bistable snap-through power take-off (PTO) operating inside a submerged wave energy converter (WEC). The equation of motion of the surging WEC is derived in the time domain using the Euler–Lagrange equations. The dynamic response of the WEC in regular waves is studied first. It is found that the wave amplitude has a significant impact on the energy conversion efficiency with the proposed energy extraction mechanism. With larger waves impacting on the WEC, the conversion efficiency of the present nonlinear PTO increases significantly. Three response regimes, i.e. local oscillation, aperiodic snap-through, and periodic snap-through, of the nonlinear PTO system are observed with various wave amplitudes. This nonlinear feature is quite different from the linear PTO mechanism that is independent of the wave amplitude. Further, the dynamic response of the nonlinear WEC subjected to irregular wave sea conditions is investigated. Parametric studies have been carried out to determine the optimum operating conditions of the bistable device in order to maximize the wave energy extraction. The utilization of the snap-through PTO can enhance the efficiency of the WEC over its linear counterpart in irregular waves.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Wang, Lixian
Tang, Hui
Wu, Yanhua
format Article
author Wang, Lixian
Tang, Hui
Wu, Yanhua
author_sort Wang, Lixian
title On a submerged wave energy converter with snap-through power take-off
title_short On a submerged wave energy converter with snap-through power take-off
title_full On a submerged wave energy converter with snap-through power take-off
title_fullStr On a submerged wave energy converter with snap-through power take-off
title_full_unstemmed On a submerged wave energy converter with snap-through power take-off
title_sort on a submerged wave energy converter with snap-through power take-off
publishDate 2020
url https://hdl.handle.net/10356/141609
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