人工海底装置(ABS)是一种新型深海石油钻井装置。 ABS在水面下300 m位置处提供了一个稳定的工作平台,以充分降低海面波浪载荷的直接影响。而对于主要承受海流载荷作用的ABS,准确获取其水动力系数对于预报ABS的运动响应是十分重要的。文章通过计算流体力动力学(CFD)的方法计算得到ABS的水动力系数,同时对比数值模拟结果与理论分析和实验结果,验证了文中计算方法的准确性和有效性。此外,通过基于时域分析的方法进行参数敏感性分析,探究了各个水动力系数对ABS运动响应的影响。
Artificial Buoyancy Seabed (ABS) system is considered as an attractive alternative system in deep water for offshore petroleum exploration. ABS unit provides a buoyant stable platform, which is located at 300 meters below the sea surface to minimize direct wave loading. Thus, a good selec-tion of hydrodynamic coefficients is of vital importance to determine the behavior of ABS unit, which is under the direct action of the sea condition of various currents. In this study, appropriate hydrodynamic coefficients of ABS unit are derived by means of computational fluid dynamics ap-proach, the accuracy and validity of which are proved by comparing with analytical and experimen-tal data. Furthermore, parametric sensitivity of each hydrodynamic coefficient on the ABS unit mo-tions is calculated and investigated in time domain.