Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control

IF 0.7 Q4 ENGINEERING, OCEAN

Ocean Systems Engineering-An International Journal Pub Date : 2017-01-01 DOI:10.12989/OSE.2017.7.3.225

H. Kang, Moo-Hyun Kim, S. Aramanadka, HeonYong Kang, K. Lee

{"title":"Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control","authors":"H. Kang, Moo-Hyun Kim, S. Aramanadka, HeonYong Kang, K. Lee","doi":"10.12989/OSE.2017.7.3.225","DOIUrl":null,"url":null,"abstract":"Excessive dynamic-tension variations on the top-tensioned risers (TTRs) deteriorate the structural integrity and cause potential safety hazards. This phenomenon has become more remarkable in the development of deep-water fields with harsher environmental loads. The conventional prediction method of tension variations in hydro-pneumatic tensioner (HPT) has the disadvantage to underestimate the magnitude of cyclic loads. The actual excessive dynamic tension variations are larger when considering the viscous frictional fluid effects. In this paper, a suppression method of tension variations in HPT is modeled by incorporating the magneto-rheological (MR) damper and linear-force actuator. The mathematical models of the combined HPT and MR damper are developed and a force-control scheme is introduced to compensate the excessive tension variations on the riser tensioner ring. Numerical simulations and analyses are conducted to evaluate the suppression of tension variations in HPT under both regular- and irregular-wave conditions for a drilling riser of a tensioned-leg platform (TLP). The results show that significant reduction of tension variations can be achieved by introducing the proposed system. This research has provided a theoretical foundation for the HPT tension control and related structural protection.","PeriodicalId":44219,"journal":{"name":"Ocean Systems Engineering-An International Journal","volume":"7 1","pages":"225-246"},"PeriodicalIF":0.7000,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ocean Systems Engineering-An International Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.12989/OSE.2017.7.3.225","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: 11

Abstract

Excessive dynamic-tension variations on the top-tensioned risers (TTRs) deteriorate the structural integrity and cause potential safety hazards. This phenomenon has become more remarkable in the development of deep-water fields with harsher environmental loads. The conventional prediction method of tension variations in hydro-pneumatic tensioner (HPT) has the disadvantage to underestimate the magnitude of cyclic loads. The actual excessive dynamic tension variations are larger when considering the viscous frictional fluid effects. In this paper, a suppression method of tension variations in HPT is modeled by incorporating the magneto-rheological (MR) damper and linear-force actuator. The mathematical models of the combined HPT and MR damper are developed and a force-control scheme is introduced to compensate the excessive tension variations on the riser tensioner ring. Numerical simulations and analyses are conducted to evaluate the suppression of tension variations in HPT under both regular- and irregular-wave conditions for a drilling riser of a tensioned-leg platform (TLP). The results show that significant reduction of tension variations can be achieved by introducing the proposed system. This research has provided a theoretical foundation for the HPT tension control and related structural protection.

查看原文本刊更多论文

利用力补偿控制抑制油气立管张紧器张力变化

顶张立管的动张力变化过大，会破坏结构的完整性，造成安全隐患。在环境负荷更为恶劣的深水油田开发中，这种现象变得更加显著。传统的液压-气动张紧器张力变化预测方法存在着低估循环载荷量级的缺点。考虑黏性摩擦流体效应时，实际的超动张力变化更大。本文提出了一种结合磁流变阻尼器和线性力致动器的HPT张力抑制方法。建立了HPT和MR组合阻尼器的数学模型，并引入了一种力控制方案来补偿隔水管张紧环上的过大张力变化。通过数值模拟和分析，对张力腿平台钻井隔水管在规则波和不规则波条件下HPT张力变化的抑制效果进行了评价。结果表明，引入该系统可以显著减小张力变化。该研究为高压混凝土的张力控制及相应的结构防护提供了理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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.