岛礁地形影响下多体浮桥的水动力性能研究

Investigation on hydrodynamic performance of floating piers near a reef island

基于AQWA软件,对岛礁地形下带系泊系统的多浮箱浮式栈桥进行了运动响应的数值模拟,并与带岛礁地形模型试验的响应幅值算子(RAO)进行了对比分析,为浮式栈桥在实际海洋环境中的施工和运营安全等作准确预报.研究结果表明,基于AQWA软件,文中数值方法可有效模拟岛礁对多浮体的绕射和辐射等干扰;由于海底地形变化的影响,波浪将发生折射、绕射、反射等一系列的复杂变化,同时海底倾斜会对系泊缆绳张力造成影响,从而会影响浮桥的运动响应.数值模拟岛礁地形影响下多体浮桥的运动响应结果与水池试验得到的数值对比吻合良好.

Based on the AQWA software,the motion response of floating piers with mooring system near a reef island is simulated. The numerical results of RAOs are compared with experimental data. The research purpose of this paper is to make accurate forecasts on floating piers in the actual construction and operation safety. Results indicate that AQWA is able to accurately simulate the hydrodynamic interaction between the floating piers and the reef island. Due to changes in sea floor terrain,waves will exhibit a series of complex changes including refraction,diffraction and reflection. The sloping seabed can affect the mooring cable tension which will affect the response of the floating piers as well. The hydrodynamics and motions of the floating piers near the reef island can be numerically computed with a reasonable agreement with experimental data.