非坐底式浮力摆波浪能装置运动的特性试验

Experimental study of motion behaviors for non-bottom-hinged flap wave-energy converter

针对现有的坐底式浮力摆波浪能发电装置维修困难的问题,本文提出一种非坐底式浮力摆波浪能发电装置,并对其运动特性进行试验研究。在将摆板不铰接于海底的情况下,采用1∶4的大比尺制作浮力摆进行试验模型,并在模型底部转轴上安装旋转阻尼器来模拟发电时液压缸的运动阻尼。通过无触点角度传感器来测量不同厚度的模型在不同海况和不同吃水下的运动响应,可以得出结论:浮力摆随着浸没深度增加,固有周期先增大后减小,波浪周期在靠近浮力摆固有周期时,浮力摆运动幅值显著增加;浮力摆在不同的吃水下均可以正常摆动发电,在浮力摆刚浸没水中时其运动幅值最小。

Because it is difficult to maintain the power generation assembly for the bottom-hinged flap wave energy converter that has already been widely applied,this report presents a new type of non-bottom-hinged flap wave energy converter and also presents the experimental study conducted to investigate its motion behaviors. When the flap is not hinged to the bottom,a 1 ∶4 model of flap wave energy converter was fabricated and a rotation damper was installed on the shaft to simulate the hydraulic cylinder damp while the flap wave energy converter was working. The motion behaviors of the flap were obtained during different thicknesses of the flap,different sea conditions,and different drafts through the no-touch point angle transducer. The characteristic of the flap and the influence law of different environments on the motion behaviors of the flap were also discussed. The results show that the natural period of the flap initially increases and then decreases as the draft increases. In addition,the motion of the flap is significant when the wave period equals the natural period of the flap. Nonetheless,the flap can work normally at different drafts,but the motion amplitude is the least when the flap is barely submersible.