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运用水动力学软件AQWA对潮流能发电平台进行了频域分析,得到不同重心高度、不同水深、遭遇不同浪向角条件下平台各自由度幅值响应算子随波浪圆频率的变化曲线。再对平台进行了风浪流联合作用下的时域耦合分析,研究不同系泊角度对平台运动响应和系泊缆张力的影响。计算结果表明:纵荡幅值响应算子峰值随浪向角的增大而逐渐减小,横荡幅值响应算子峰值随浪向角的增大而增大,纵荡、横荡上主要表现为与波浪的低频共振,浪向角较小会产生较大的垂荡运动、纵荡运动、纵摇运动,浪向角较大会导致较大的横摇运动;水深小于10m时,海底对波浪的反射作用对平台纵荡和艏摇运动影响比较明显;小范围内的重心高度变化对平台各自由度幅值响应算子影响较小。当系泊角度为45°时,系泊系统对平台运动响应的控制更好,且此时系泊系统的安全系数最大,主要系泊缆受力更加合理,平台更安全。
The frequency domain analysis of tidal current energy generation platform was carried out by using hydrodynamic software AQWA, and the curves of the amplitude response of various degrees of freedom of the platform with the circular frequency of wave were obtained under different gravity centers, different water depths and different wave angles. Then the time-domain coupling analysis of the platform under the combined effect of wind and wave flow was conducted to study the influence of different mooring angles on the platform motion response and mooring line tension. The calculation results show that the peak value of the amplitude response operator decreases gradually with the increase of the wavy direction angle, and the peak amplitude value of the amplitude response operator increases with the increase of the wavy direction angle. The low frequency resonance with the waves shows that the smaller the sag angle is, the larger the sag motion is. The larger the sag motion is, the larger the sag motion, the pitch motion and the larger the sag angle. When the water depth is less than 10 m, The reflection of the wave has obvious influence on the longitudinal oscillation and rocking motion of the platform. The variation of the center of gravity in the small range has a small effect on the amplitude response operator of each degree of freedom of the platform. When the mooring angle is 45 °, the mooring system can control the response of the platform better, and at this moment, the mooring system has the biggest safety factor, the main mooring line is more reasonable and the platform is safer.