基于全耦合时域计算的半潜平台气隙预报.docx

基于全耦合时域计算的半潜平台气隙预报
摘要:
随着海洋的石油资源开采的日益增加，半潜平台作为一种重要的海上石油钻采设备受到了广泛的关注。然而，气隙作为半潜平台的重要组成部分，其状态的稳定性和安全性对于半潜平台的运行和人员的安全至关重要。因此，进行气隙预报和气隙状态监测显得尤为重要。
本论文基于全耦合时域计算的方法，研究了半潜平台气隙的预报和状态监测问题。首先，本文介绍了半潜平台的概念和气隙的基本知识，然后建立了半潜平台与环境、水下系统等整体耦合的模型，利用时域分析方法解决了这个模型的数学方程，从而得到了气隙的状态。
通过模拟不同的工况条件，我们发现，半潜平台气隙的状态与船体振动、环境压力、水下系统的艏偏等因素密切相关。其中，艏偏是影响气隙状态的主要因素之一，如果产生大的艏偏，将会导致气隙的振动增加，从而对半潜平台的稳定性产生不利影响。
本文还分别研究了半潜平台运行时、停泊时和加油过程中气隙的状态，并提出了相应的监测和预报方法。最后，本文总结了研究结果，并探讨了进一步的研究方向。
关键词：半潜平台；气隙；全耦合时域计算；状态监测；预报
Abstract:
Withtheincreasingexploitationofoffshoreoilresources,semi-submersibleplatformshaveattractedwidespreadattentionasanimportantoffshoreoildrillingandminingequipment.However,asanimportantcomponentofsemi-submersibleplatforms,thestabilityandsafetyofgasgapsarecrucialfortheoperationofsemi-submersibleplatformsandthesafetyofpersonnel.Therefore,gasgappredictionandgasgapstatusmonitoringareparticularlyimportant.
Basedonthefullycoupledtimedomaincalculationmethod,thispaperstudiestheproblemofgasgappredictionandstatusmonitoringinsemi-submersibleplatforms.Firstly,thispaperintroducestheconceptofsemi-submersibleplatformsandthebasicknowledgeofgasgaps.Then,amodelofsemi-submersibleplatformscoupledwiththeenvironment,underwatersystems,etc.isestablished.Themathematicalequationsofthismodelaresolvedbyusingthetimedomainanalysismethod,soastoobtainthestateofthegasgap.
Simulatingdifferentworkingconditions,wefoundthatthestateofgasgapinsemi-submersibleplatformsiscloselyrelatedtothevibrationofthehull,theenvironmentalpressure,andthebowdeviationoftheunderwatersystem,amongwhichthebowdeviationisoneofthemainfactorsaffectingthestateofgasgap.Ifalargebowdeviationoccurs,itwillincreasethevibrationofthegasgap,whichwillhaveanadverseeffectonthestabilityofthesemi-submersibleplatform.
Thispaperalsostudiedthestateofthegasgapduringtheoperation,mooring,andrefuelingofthesemi-submersibleplatform,respectively,andproposedcorrespondingmonitoringandpredictionmethods.Finally,thispapersummarizestheresearchresultsanddiscussesfurtherresearchdirections.
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