内置集成浮力罐的几何形Spar平台运动性能数值模拟

Numerical Simulation on Motion Performance of a Geometric Spar with Integrated Buoyancy Can

对一种新的深海单柱式平台——内置集成浮力罐的几何形Spar(Geometric Spar,G-Spar)的运动性能进行了数值计算研究,并与模型试验结果进行了比较.G-Spar平台结构复杂,探索性地建立了简化的三维水动力数值模型,对包括系泊缆和立管在内的耦合系统进行了运动响应传递函数(RAO)的频域分析和极端海况下的时域分析.研究表明,运动响应传递函数及极端海况下运动时历的计算结果和试验结果基本一致,G-Spar平台具有良好的运动性能,垂荡板对降低G-Spar平台的垂向运动起到了关键性的作用.

The numerical simulation on motion performance of a new concept of deepwater Spar with integrated buoyancy can （IBC） inside, which is called Geometric Spar （G-Spar）, was carried out and the results are compared with the model test results. Simplified 3D hydrodynamic numerical model was tentatively established due to the complex configuration of the platform. Frequency domain analysis of the motion response amplitude operator （RAO） and time domain analysis in extreme sea condition are both conducted to the coupled system with the mooring lines and risers involved. The comparison between the numerical simulation and model test results shows that the results of response amplitude operator and response time series in the extreme sea condition are basically coincident. It is indicated that the concept of G-Spar is provided with favorable hydrodynamic behavior, and the heave plates contribute significantly to reduce the heave motion.