Dynamic response of three different floating platform (OC4, BSS, GVA) using multi-segment mooring system

IF 4.3 2区 工程技术 Q1 ENGINEERING, OCEAN Applied Ocean Research Pub Date : 2024-11-04 DOI:10.1016/j.apor.2024.104301
Atefeh Neisi , Hassan Ghassemi , Mehdi Iranmanesh
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Abstract

The design of mooring lines for floating platforms is an essential task to guarantee structure survivability and its components under different metocean conditions. This paper focuses on the application and comparison of the MSM-BMW system across various types of semisubmersible platforms, including the OC4-DeepCwind, the braceless semi-submersible (BSS) with three catenary mooring lines, and the drilling rig GVA 4000 with eight mooring lines. The performance of the BMW mooring system for these three platforms is compared under operational and survival conditions. The hybrid mooring concept is a multi-segment mooring (MSM) arrangement of the catenary and taut, including single buoy and multi-clump weight (BMW), generally named MSM-BMW. Hydrodynamic responses and mooring forces are compared between original and hybrid systems under regular and irregular wave conditions. The dynamic response of the platform is performed utilizing both Morrison theory and three-dimensional radiation/diffraction theory based on the boundary element method (BEM) in ANSYS-AQWA software. The results show that using BMW on the three floating platforms significantly reduces platform motion at low frequencies, with minimal effect on wave-frequency resonance. However, the BMW system increases mooring force at wave frequency, while having a smaller effect at low frequencies. The effectiveness of the BMW system varies across platforms and motion types. The BSS platform shows significant improvement in surge motion, while the GVA platform has the smallest ratio in heave motion. Additionally, the BSS platform demonstrates the least response in pitch motion.
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使用多段系泊系统的三种不同浮式平台(OC4、BSS 和 GVA)的动态响应
浮式平台的系泊缆线设计是保证结构及其部件在不同海洋条件下的生存能力的一项重要任务。本文重点介绍了 MSM-BMW 系统在不同类型半潜式平台上的应用和比较,包括 OC4-DeepCwind、配备三根导管缆绳的无支架半潜式平台(BSS)和配备八根缆绳的 GVA 4000 钻井平台。对这三个平台的 BMW 系泊系统在操作和生存条件下的性能进行了比较。混合系泊概念是一种多段系泊(MSM),包括单浮标和多块重物(BMW),一般命名为 MSM-BMW。比较了原始系统和混合系统在规则和不规则波浪条件下的水动力响应和系泊力。在 ANSYS-AQWA 软件中,利用基于边界元法(BEM)的莫里森理论和三维辐射/衍射理论对平台的动态响应进行了研究。结果表明,在三个浮动平台上使用 BMW 系统可显著减少低频时的平台运动,对波频共振的影响微乎其微。然而,BMW 系统增加了波频下的系泊力,而对低频的影响较小。BMW 系统的效果因平台和运动类型而异。BSS 平台在浪涌运动方面有明显改善,而 GVA 平台在波浪运动方面的比率最小。此外,BSS 平台对俯仰运动的响应最小。
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来源期刊
Applied Ocean Research
Applied Ocean Research 地学-工程:大洋
CiteScore
8.70
自引率
7.00%
发文量
316
审稿时长
59 days
期刊介绍: The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.
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