Motion-resonant modes of large articulated damped oscillators in waves

作     者：Renzi, E. Dias, F. 

作者机构：Univ Coll Dublin Sch Math Sci Belfield Dublin 4 Ireland Ecole Normale Super CMLA F-94235 Cachan France 

出 版 物：《JOURNAL OF FLUIDS AND STRUCTURES》 (流体与结构杂志)

年 卷 期：2014年第49卷

页      面：705-715页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Science Foundation Ireland [SFI/10/IN.1/I2996] 

主　　题：Fluid-structure interaction Multiple resonance Wave energy 

摘      要：Using a semi-analytical approach, we show that an articulated system of large damped oscillators in the open ocean can be resonated by incoming waves at multiple frequencies. As an application, energy extraction from the system is modelled when the oscillators are used as flap-type wave energy converters. A new parameter - the absorption efficiency is introduced to analyse the performance of the system at resonance. This allows us to identify the occurrence of detrimental processes near the resonant frequencies, which reduce the sustainability of the energy conversion process. This result challenges the diffused belief that large flap-type wave energy converters must be designed to resonate, which is based on the use of inappropriate performance descriptors. (C) 2014 Elsevier Ltd. All rights reserved.