Analysis of safety and impact probability of subsea Christmas tree impacted by falling objects

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2024-06-29 DOI:10.1016/j.marstruc.2024.103655

Nan Pang , Xiangyu Wang , Zhuang Liu , Kai Xu , Zhong Liu , Zhonggang Xiong , Chao Li

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引用次数: 0

Abstract

At present, there is no clear data to analyze the probability and impact of falling objects on the subsea Christmas tree. However, during the long-term operation in the complex deep-sea environment, objects may fall and hit the tree due to the anchored platform, fishing boat operation or other reasons, the impact of large heavy objects onto the tree can potentially give rise to the development of internal forces higher than those for which the tree was designed to. Therefore, aiming at the risk problem of falling objects, the paper presents the development process and results of an improved impact probability numerical method. And the safety model of falling object impact on the tree is established. Preliminary results indicate that the method offers valuable insight including and beyond a probability estimation of third-party damage, and the safety results were obtained. At the same time, the influencing factors of the tree impacted by falling objects are analyzed, and the serious influencing factors are obtained, which provides theoretical basis for the design and optimization of the protection frame of subsea square equipment.

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水下圣诞树受坠落物体撞击的安全性和撞击概率分析

目前，还没有明确的数据来分析坠落物体对海底圣诞树的概率和影响。然而，在复杂的深海环境中长期作业时，由于锚定平台、渔船作业或其他原因，可能会有物体坠落并撞击圣诞树，大型重物对圣诞树的撞击有可能导致圣诞树产生高于设计的内力。因此，针对高空坠物的风险问题，本文介绍了一种改进的撞击概率数值方法的开发过程和结果。并建立了高空坠物撞击树木的安全模型。初步结果表明，该方法提供了包括第三方损害概率估计在内的有价值的见解，并获得了安全结果。同时，分析了高空坠物撞击树木的影响因素，得出了严重影响因素，为水下广场设备保护架的设计和优化提供了理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.