多自由度轴对称型波能转换装置水动力性能研究  

Hydrodynamic Performance of Multiple Degrees of Freedom Wave Energy Converter with Vertical Axis of Symmetry

作　　者：王冬姣[1] 刘鲲 邱守强[1] WANG Dongjiao;LIU Kun;QIU Shouqiang(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《中国造船》2021年第2期119-131,共13页Shipbuilding of China

基　　金：国家重点研发计划资助项目(2018YFB1501904),广东省科技计划项目(2015B010919006)。

摘　　要：提出了由垂直轴对称浮体和铰接动力输出(PTO)管组成的多自由度波能转换装置,垂向动力输出机构安装在PTO管内,在波浪作用下浮体可沿PTO管滑动。应用线性势流理论建立该波能转换装置的水动力分析模型,并简化为浮体垂荡、浮体及PTO管相对于铰接点的纵摇和横摇3个单自由度运动方程。为了验证计算模型的正确性,在随浪工况下将各单自由度频域计算结果与基于AQWA-NAUT时域计算结果进行了比较。点吸收装置通常利用海浪作用下浮体相对于固定框架或水下物体的垂荡运动获取能量,其能量俘获带宽相对较窄,而论文提出的新型波能转换装置可俘获浮体多个自由度方向的能量。研究表明,相对于垂荡单自由度点吸收装置,新型多自由度轴对称型波能转换装置可提高波能俘获效率及能量俘获带宽。A new type of multiple degrees of freedom wave energy converter is proposed,which consists of a floating buoy with vertical axis of symmetry and an articulated power take-off(PTO)pipe.Vertical power taking-off mechanisms are installed in the PTO pipe,and the floating buoy can slide along the PTO pipe under the action of water waves.Based on linear potential theory,a hydrodynamic model of the wave energy converter is established,which is able to generate power in multiple degrees of freedom,and can be simplified into three equations of single degree of freedom for heave,pitch and roll relative to hinge joint of the buoy and PTO pipe.In order to verify the correctness of the model,the frequency-domain results for each degree of freedom are compared with those based on AQWA-NAUT.Compared with the heave point absorption device,the new type of wave energy converter is able to capture energy of the floating buoy in multiple degrees of freedom,so as to improve wave energy capture efficiency and energy capture bandwidth.

关 键 词：多自由度 波能转换装置 垂荡 纵摇 

分 类 号：P743.2[天文地球—海洋科学]