大型无动力钻井平台拖带进广州港拖航阻力计算

Calculation of Towing Resistance of Large-scale Unpowered Drilling Rig Towed into Guangzhou Harbour

为提升大型无动力钻井平台拖带进广州港拖航阻力计算精度,合理匹配符合要求的拖轮,基于《海上拖航指南》及流体力学理论,综合考虑海上拖带作业通航环境特点,引入拖缆阻力、汹涛阻力、污底阻力等多种附加阻力因素,提出了一种考虑多因素约束的大型无动力钻井平台拖带进港拖航阻力计算方法.以“海洋石油982”大型无动力钻井平台拖带进广州港为例,应用上述方法对拖航阻力进行计算,结果表明:与指南计算结果相比,本文提出的方法计算结果与实际情况更为接近,依据该方法选择拖带拖轮更为科学合理.

In order to improve the accuracy of the calculation of towing resistance for towing large-scale unpowered drlling platforms into Guangzhou harbour,and to provide a reference for the reasonable matching of tugboats that meet the requirements.Based on the Offshore Towing Guidelines and hydrodynamic theory,and considering the characteristics of the navigational environment of offshore towing operation,we introduce a variety of additional resistance factors,such as towing cable resistance,rough sea resistance,and fouling bottom resistance,and put forward a method of calculating the towing resistance of large-scale unpowered rig towing into Guangzhou Harbour with consideration of multi-factor constraints.Taking"Haiyang Petroleum 982"large-scale non-powered drilling plaform towing into Guangzhou harbour as an example,the above method is applied to calculate the towing resistance,and the results show that:compared with the results of the guideline calculation,the calculation results of the method proposed in this paper are closer to the actual situation,and the selection of towing tugs based on the method is more scientific and reasonable,which verifies the accuracy of the calculation method in this paper.The accuracy of the calculation method.