论文摘要
In this study, we investigated the hydrodynamic and energy conversion performance of a double-float wave energy converter（WEC） based on the linear theory of water waves. The generator power take-off（PTO） system is modeled as a combination of a linear viscous damping and a linear spring. Using the frequency domain method, the optimal damping coefficient of the generator PTO system is derived to achieve the optimal conversion efficiency（capture width ratio）.Based on the potential flow theory and the higher-order boundary element method（HOBEM）, we constructed a threedimensional model of double-float WEC to study its hydrodynamic performance and response in the time domain. Only the heave motion of the two-body system is considered and a virtual function is introduced to decouple the motions of the floats. The energy conversion character of the double-float WEC is also evaluated. The investigation is carried out over a wide range of incident wave frequency. By analyzing the effects of the incident wave frequency, we derive the PTO’s damping coefficient for the double-float WEC’s capture width ratio and the relationships between the capture width ratio and the natural frequencies of the lower and upper floats. In addition, it is capable to modify the natural frequencies of the two floats by changing the stiffness coefficients of the PTO and mooring systems. We found that the natural frequencies of the device can directly influence the peak frequency of the capture width, which may provide an important reference for the design of WECs.
论文目录
文章来源
类型: 期刊论文
作者: 张亮,金鹏,周斌珍,政雄波,刘恒序
来源: Journal of Marine Science and Application 2019年01期
年度: 2019
分类: 工程科技Ⅱ辑,基础科学
专业: 海洋学,新能源
单位: College of Shipbuilding Engineering, Harbin Engineering University,College of Science, Harbin Engineering University
基金: supported by the National Natural Science Foundation of China(51409066,51761135013),High Technology Ship Scientific Research Project from the Ministry of Industry and Information Technology of the People’s Republic of China-Floating Security Platform Project(the second stage,201622),the Fundamental Research Fund for the Central University(HEUCFJ180104,HEUCFP1809)
分类号: P743.2
页码: 54-63
总页数: 10
文件大小: 1233K
下载量: 62
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