基于非线性摆杆刚度机构的点吸式波能转换器  

Point-Absorbing Wave Energy Converter Based on Nonlinear Pendulum Stiffness Mechanism

作　　者：黄修远 向仍进 周潇 金华清 黄宇航 宋新华[3] 毕仁贵[1,4] HUANG Xiuyuan;XIANG Rengjin;ZHOU Xiao;JIN Huaqing;HUANG Yuhang;SONG Xinhua;BI Rengui;无(College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China;College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China;Zhangjiajie Institute of Aeronautical Engineering,Zhangjiajie 427000,Hunan China;Research Center of Lightweight and Intelligence for Advanced Equipment,Jishou University,Jishou 416000,Hunan China)

机构地区：[1]吉首大学物理与机电工程学院,湖南吉首416000 [2]湖南大学机械与运载工程学院,湖南长沙410082 [3]湖南张家界航空工业职业技术学院,湖南张家界427000 [4]吉首大学先进装备轻量化与智能化研究中心,湖南吉首416000

出　　处：《吉首大学学报（自然科学版）》2024年第2期40-44,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家级大学生创新创业训练计划资助项目(202110531014);湖南省自然科学基金项目(2022JJ60012);吉首大学人才资助项目(JSDXRCYJKYXM201602)。

摘　　要：为了稳定捕获海洋低频波能,设计了一种基于非线性摆杆刚度机构的点吸式波能转换器.通过在摆杆间添加简单的拉伸弹性元件,制作了紧凑的摆杆刚度装置.对非线性刚度结构进行了受力分析,结合Cummins方程,建立了非线性波能转换器的时域动力学模型,并分析了规则波作用下点吸式波能转换器的波能转换特性.数值仿真结果表明,引入合适的非线性摆杆刚度机构可以提升系统在波浪激励下的运动响应,降低系统在波浪激励下运动响应峰值对应的频率,从而提高系统对于低频能量的捕获效率.In order to achieve stable capture of ocean low-frequency wave energy,a point-absorbing wave energy converter based on a nonlinear pendulum stiffness mechanism was designed.A compact pendulum stiffening device was constructed through addition of simple tensile elastic elements between the pendulums.The force analysis of the nonlinear stiffness structure was carried out the time domain dynamic model of the nonlinear wave energy converter was established based on the Cummins equation,and the wave energy conversion characteristics of the point absorption wave energy converter under the action of regular waves were analyzed.Numerical simulation shows that through introduction of an appropriate nonlinear pendulum stiffness mechanism,the motion response of the system under wave excitation can be improved,and the frequency corresponding to the peak motion response of the system under wave excitation can be reduced,thereby improving the system's capture efficiency of low-frequency energy.

关 键 词：刚度 波能转换器 非线性 频率 捕获效率 

分 类 号：P743.2[天文地球—海洋科学] O322[理学—一般力学与力学基础]