典型半潜式平台结构的微振子捕能特性研究北大核心CSCD

半潜式平台在海洋资源开发领域应用前景广阔,但存在平台设备能源供给不足的问题。本研究把常见的半潜式平台简化为三种典型的浮式基础,将波浪能发电装置集成至浮式基础,建立浮式基础与浮子耦合的运动方程,利用水动力仿真软件AQWA开展数值模拟和参数化分析,获得了波浪方向、浮式基础的截面形状、浮子直径以及浮子与浮式基础间距等因素对浮子捕能特性的影响规律。结果表明,四棱柱浮式基础在特定波浪方向下能够增强微阵列浮子的捕能效果,三棱柱浮式基础使微阵列浮子更好地适应各个方向的波浪激励,圆柱浮式基础以遮蔽效应为主,较大程度上减弱了浮子的捕能特性;不同波浪方向对四棱柱浮式基础、三棱柱浮式基础周围的浮子影响较大,而对基于圆柱浮式基础的微阵列浮子影响不大;通过增加浮子的直径以及浮子距圆柱浮式基础的距离,能够有效提高微阵列浮子平均输出功率。本研究可为半潜式平台与波浪能发电装置的集成提供参考。

Study on micro-oscillator energy capture characteristics of typical semi-submersible platform structure

Semi-submersible platform has a broad application prospect in the field of marine resources development, but there exists a problem of insufficient energy supply for platform equipment. In this study, a common semi-submersible platform is simplified into three typical floating foundations, and a wave power generation device is integrated into the foundation, so that a motion equation can be derived to couple the foundation and its floats. A hydrodynamic simulation code, i.e. AQWA, is used to carry out numerical simulations and parametric analysis, and the effects of several factors on the float’s energy capturing characteristics are obtained－wave incidence, the cross-sectional shape of the floating foundation, its diameter, and its distance to the foundation. The results show that for the microarray float, a four-prism foundation can enhance its energy capture in a specific wave incidence, while a three-prism shape makes it better adapted to wave excitation from all directions. A cylindrical floating foundation has a significant masking effect, weakening the float’s energy capture to a large extent. Wave incidence has a great influence on the floats around a four-prism or three-prism foundation, but little influence on the floats based on the cylindrical foundation. The average power output of a microarray float can be improved significantly by increasing its diameter or its distance to the cylindrical foundation.