Experimental assessment of slamming coefficients for subsea equipment installations

IF 0.7 Q4 ENGINEERING, OCEAN

Ocean Systems Engineering-An International Journal Pub Date : 2020-06-01 DOI:10.12989/OSE.2020.10.2.163

A. C. Oliveira, R. G. Pestana

{"title":"Experimental assessment of slamming coefficients for subsea equipment installations","authors":"A. C. Oliveira, R. G. Pestana","doi":"10.12989/OSE.2020.10.2.163","DOIUrl":null,"url":null,"abstract":"Considering the huge demand of several types of subsea equipment, as Christmas Trees, PLEMs (Pipeline End Manifolds), PLETs (Pipeline End Terminations) and manifolds for instance, a critical phase is its installation, especially when the equipment goes down through the water, crossing the splash zone. In this phase, the equipment is subject to slamming loads, which can induce impulsive loads in the installation wires and lead to their rupture. Slamming loads assessment formulation can be found in many references, like the Recommended Practice RP-N103 from DNV-GL (2011), a useful guide to evaluate installation loads. Regarding to the slamming loads, RP-N103 adopt some simplifying assumptions, as considering small dimensions for the equipment in relation to wave length, in order to estimate the slamming coefficient CS used in load estimation. In this article, an experimental investigation based on typical subsea structure dimensions was performed to assess the slamming coefficient evaluation, considering a more specific scenario in terms of application, and some reduction of the slamming coefficient is achieved for higher velocities, with positive impact on operability.","PeriodicalId":44219,"journal":{"name":"Ocean Systems Engineering-An International Journal","volume":"10 1","pages":"163"},"PeriodicalIF":0.7000,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ocean Systems Engineering-An International Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.12989/OSE.2020.10.2.163","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, OCEAN","Score":null,"Total":0}

引用次数: 2

Abstract

Considering the huge demand of several types of subsea equipment, as Christmas Trees, PLEMs (Pipeline End Manifolds), PLETs (Pipeline End Terminations) and manifolds for instance, a critical phase is its installation, especially when the equipment goes down through the water, crossing the splash zone. In this phase, the equipment is subject to slamming loads, which can induce impulsive loads in the installation wires and lead to their rupture. Slamming loads assessment formulation can be found in many references, like the Recommended Practice RP-N103 from DNV-GL (2011), a useful guide to evaluate installation loads. Regarding to the slamming loads, RP-N103 adopt some simplifying assumptions, as considering small dimensions for the equipment in relation to wave length, in order to estimate the slamming coefficient CS used in load estimation. In this article, an experimental investigation based on typical subsea structure dimensions was performed to assess the slamming coefficient evaluation, considering a more specific scenario in terms of application, and some reduction of the slamming coefficient is achieved for higher velocities, with positive impact on operability.

查看原文本刊更多论文

海底设备装置撞击系数的实验评定

考虑到几种类型的海底设备的巨大需求，例如采油树、PLEM（管道末端歧管）、PLET（管道末端终端）和歧管，关键阶段是其安装，尤其是当设备穿过飞溅区沉入水中时。在此阶段，设备承受砰击载荷，这可能会在安装电线中引发冲击载荷并导致其断裂。冲击载荷评估公式可以在许多参考文献中找到，如DNV-GL（2011）的推荐规程RP-N103，这是评估安装载荷的有用指南。关于砰击载荷，RP-N103采用了一些简化的假设，如考虑设备相对于波长的小尺寸，以估计载荷估计中使用的砰击系数CS。在本文中，基于典型的海底结构尺寸进行了实验研究，以评估砰击系数评估，考虑到应用方面的更具体的场景，并且在更高的速度下实现了砰击系数的一些降低，对可操作性产生了积极影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ocean Systems Engineering-An International Journal ENGINEERING, OCEAN-

自引率

22.20%

发文量

期刊介绍： The OCEAN SYSTEMS ENGINEERING focuses on the new research and development efforts to advance the understanding of sciences and technologies in ocean systems engineering. The main subject of the journal is the multi-disciplinary engineering of ocean systems. Areas covered by the journal include; * Undersea technologies: AUVs, submersible robot, manned/unmanned submersibles, remotely operated underwater vehicle, sensors, instrumentation, measurement, and ocean observing systems; * Ocean systems technologies: ocean structures and structural systems, design and production, ocean process and plant, fatigue, fracture, reliability and risk analysis, dynamics of ocean structure system, probabilistic dynamics analysis, fluid-structure interaction, ship motion and mooring system, and port engineering; * Ocean hydrodynamics and ocean renewable energy, wave mechanics, buoyancy and stability, sloshing, slamming, and seakeeping; * Multi-physics based engineering analysis, design and testing: underwater explosions and their effects on ocean vehicle systems, equipments, and surface ships, survivability and vulnerability, shock, impact and vibration; * Modeling and simulations; * Underwater acoustics technologies.