考虑海上结构风屏蔽效应的动力定位能力分析方法研究

IF 1.3 4区 工程技术 Q3 ENGINEERING, CIVIL
Jinhui He, Haibin Zhang, R. Zhu
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引用次数: 0

摘要

漂浮在海上的海上结构物应使用其动态定位(DP)系统来保持位置并抵抗环境载荷,包括波浪载荷、水流载荷和风载荷。由于不同部件对海洋结构的屏蔽作用,很难准确、快速地计算环境荷载,尤其是风荷载。为了提高风荷载计算的准确性,提出了一种考虑屏蔽效应的新方法。与传统方法相比,新方法的计算风力更接近于风洞试验。环境负荷作为DP容量分析的输入数据,对DP系统的设计有着至关重要的影响。文中还提出了DP承载力的静态方法和时域模拟方法,并以钻井船为例进行了实例研究。DP容量的静态分析和时域模拟结果表明,新的风荷载计算方法提高了环境荷载计算和DP容量分析的准确性。随着海上石油和天然气开采进一步深入深海,海上结构物将用于恶劣的海洋环境,包括强风、海流和波浪。特别是对于风,它会对海洋结构物的动态定位系统产生很大影响,该系统旨在保持位置和航向。一旦DP系统不能保持海上结构物的位置和航向,就会导致海洋中的漏油和石油污染等事故。由于甲板室、井架、起重机、管架等海洋结构各部分之间存在着遮风作用,风荷载难以准确、快速地计算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on Dynamic Positioning Capacity Analysis Method Considering Wind Shielding Effect of Offshore Structure
Offshore structures floating at sea should use their dynamic positioning (DP) system to maintain position and heading against environmental loads, including wave loads, current loads, and wind loads. It is difficult to calculate environmental loads accurately and quickly, especially for wind loads due to the shielding effect of different parts on offshore structures. To improve the accuracy of wind load calculation, a new method considering shielding effect is proposed. With the new method, calculated wind force becomes much closer to wind tunnel test than the traditional method. As input data of DP capacity analysis, the environmental loads have critical impact on the design of DP system. A static method and a time-domain simulation method of DP capacity are also proposed, and a case study of drillship is carried out. The results of both static analysis and time-domain simulation of DP capacity show that the new wind load calculation method has improved the accuracy of environmental load calculation and DP capacity analysis. As the offshore oil and gas exploitation is going further into deep sea, offshore structures are to be used in harsh marine environments, including strong wind, current, and waves. Especially for wind, it can make great effect on the dynamic positioning (DP) system of offshore structures, which is designed to maintain position and heading. Once the DP system is not able to keep the offshore structures’ position and heading, it will cause an accident such as oil leakage and oil pollution in the ocean. Because of the wind shielding effect among all parts on offshore structures, such as deckhouse, derricks, cranes, pipe racks, the wind load is difficult to calculate accurately and quickly.
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来源期刊
Journal of Ship Research
Journal of Ship Research 工程技术-工程:海洋
CiteScore
2.80
自引率
0.00%
发文量
12
审稿时长
6 months
期刊介绍: Original and Timely technical papers addressing problems of shipyard techniques and production of merchant and naval ships appear in this quarterly publication. Since its inception, the Journal of Ship Production and Design (formerly the Journal of Ship Production) has been a forum for peer-reviewed, professionally edited papers from academic and industry sources. As such, it has influenced the worldwide development of ship production engineering as a fully qualified professional discipline. The expanded scope seeks papers in additional areas, specifically ship design, including design for production, plus other marine technology topics, such as ship operations, shipping economic, and safety. Each issue contains a well-rounded selection of technical papers relevant to marine professionals.
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