三自由度波浪能捕获装置性能与实验分析  

The Analysis and Experiment of SJTU-WEC

作　　者：吴峥[1] 许棋 陈卫星[1] WU Zheng;XU Qi;CHEN Weixing(State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240 China)

机构地区：[1]上海交通大学机械系统与振动国家重点试验室,上海200240

出　　处：《机械设计与研究》2022年第5期42-46,53,共6页Machine Design And Research

摘　　要：海洋波浪能是一种储量丰富的清洁能源,开发利用波浪能给海洋装备供电前景广阔。以小型直驱式三自由度波浪能捕获装备为研究对象,对不同周期来波和不同转动中心位置组合工况下的俘获宽度比进行了研究。首先建立了装置捕获波浪能并转换为电能的频域和时域动力学模型,探明了转动中心变化会对装置的回转刚度和所受到的波浪激振力造成改变,影响其动态响应。进而以理论模型为基础,对不同工况下装置的电压输出进行了数值计算。最后,试制了1:12.5小比例样机,并在循环水槽中进行实验,计算和实验结果表明,转动中心的改变几乎不影响垂荡方向的电压输出幅值,但能改变纵摇方向的固有频率。装置的俘获宽度比在T=1 s,d=-5.0cm时达到最高,约为28%。Wave energy is a renewable energy with inexhaustible resources.Constructing small-scale wave energy converter(WEC)to power marine equipment has a broad prospect.Taking a direct drive 3-degrees-of-freedom wave energy converter(SJTU-WEC)as the research object,the device performance under different wave periods and rotation center positions is studied.The theoretical models in both the frequency and the time domains are established.It is found that the wave force(a type of hydrodynamic coefficient)on the device and the hydrostatic stiffness vary along with the variation of rotation center position,which influences the dynamic response and the performance of the device.Simulation is carried out in SIMULINK,and ANSYS-AQWA is used to obtain the hydrodynamic coefficients.A 1:12.5 small-scale prototype is built and experimented in the wave tank and the results show that the position of the rotation center has almost no impact on the dynamic response for heave but changes the natural frequency for pitch.The capture width ratio reaches the peak,being about 28%,in the case of T=1 s and d=-5.0 cm.

关 键 词：波浪能 三自由度波浪能捕获装置 水槽实验 

分 类 号：TH11[机械工程—机械设计及理论]