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以多节漂浮式波浪能发电装置为研究对象,基于线性波理论和波-体耦合作用分析,利用刚体动力学方程方法,建立圆柱型波能捕获浮筒在波浪中的垂荡-纵荡-纵摇三自由度非线性耦合运动方程.结合中国黄渤海波浪特点,采用频域分析方法,探讨浮筒纵摇运动特性和功率响应.结果显示,浮筒纵摇运动特性主要受浮筒的固有振动频率和浮筒长度的影响;浮筒长度、PTO液压阻尼系数及弹簧劲度系数等因素不会影响浮筒的共振频率,半径和吃水则影响显著,这些因素均对功率响应具有复杂的影响.选择合适的浮筒半径、吃水、弹簧劲度系数等是提高装置的波能转换功率和对中国近海海域适应性的有效途径.
Based on the analysis of linear wave theory and wave-body coupling, a multi-section floating wave energy-generating device is studied. By using the method of rigid body dynamics, a cylindrical wave can be captured to capture the heave- Wave motion of three degrees of freedom.According to the wave characteristics of the Yellow Sea and the Bohai Sea in China, the frequency domain analysis method is used to investigate the characteristics of the pitching motion and the power response.The results show that the pitching motion of the buoy is mainly affected by the natural frequency of the buoy and the buoyancy Length, the length of the pontoon, the hydraulic damping coefficient of the PTO and the stiffness coefficient of the spring will not affect the resonance frequency of the buoy, and the influence of radius and draft is significant. All of these factors have a complex influence on the power response. Choosing the appropriate buoy radius, Draft, spring stiffness coefficient and so on are the effective ways to increase the wave-power conversion efficiency of the device and the adaptability to offshore waters of China.