针对一种船形摆式波浪能发电装置的运动响应及能量俘获特性进行研究。该波浪能发电装置以船形摆作为吸波浮体,在波浪驱动下,绕位于装置重心处的主轴旋转,主轴两端与固定在海床上支撑立柱连结,进而驱动内置的机械式动力摄取系统发电。基于线性势流理论和牛顿第二定律建立波浪能装置的运动数学模型并进行求解,得到装置在不同周期和不同阻尼下的能量俘获宽度比、运动响应以及输出功率等。研究结果表明,装置的能量俘获宽度比和摆动角度幅值随周期的增大先增大后减小。在周期为4.2 s,阻尼为80000 N·m·s/rad时,装置的能量俘获宽度比达到最大值120.92%;在周期为4.4 s,阻尼为44000 N·m·s/rad时,装置的发电功率达到最大值122 kW。
Abstract
The motion response and energy capture characteristics of a ship-shaped pendulum wave energy converter was studied. The wave energy converter uses a ship-shaped pendulum as a wave absorbing floating body, which rotates around a main shaft driven by waves. The main shaft is connected to a support column fixed on the seabed, which drives the built-in mechanical power extraction system to generate electricity. Based on linear potential flow theory and Newton's second law, a mathematical model of the motion of the wave energy device was established and solved, and the energy capture width ratio, motion response, and output power of the device under different periods and different damping were obtained. The results show that the energy capture width ratio and pendulum angle amplitude of the device first increase and then decrease with the increase of the period, reaching a maximum energy capture width ratio of 120.92% at a period of 4.2 s and a damping of 80000 N·m·s/rad. The maximum generating power of the device is 122 kW at a period of 4.4 s and a damping of 44000 N·m·s/rad.
关键词
波浪能转换 /
动力响应特性 /
势流 /
能量俘获宽度比 /
共振
Key words
wave energy conversion /
dynamic response characteristics /
potential flow /
energy capture width ratio /
resonance
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基金
广东省重点领域研发计划（2021B0202070002）; 三亚崖州湾科技城科研项目（SKJC-2020-01-007）
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