本文選題：南海海域 + 自升式生產(chǎn)儲卸油平臺�。� 參考：《江蘇科技大學(xué)》2015年碩士論文

【摘要】：自升式生產(chǎn)儲卸油平臺是當(dāng)前海上油氣生產(chǎn)的主力裝備之一,在相對較淺水域特別是邊際油田的開采生產(chǎn)中發(fā)揮著重要作用。自升式平臺建造完畢后,要運(yùn)輸?shù)焦ぷ骱Ｓ?且井口間的遷移也需要進(jìn)行拖航施工。常見的拖航方式有干拖和濕拖,其中干拖靠半潛駁或半潛運(yùn)輸船進(jìn)行運(yùn)輸;濕拖靠平臺自身浮力,借助于拖船的拉力進(jìn)行遷移工作。總的來說,干拖的難度要小于濕拖。截止目前,在全球已發(fā)生的所有海洋工程裝置事故中,自升式平臺所占比例最高,在這些事故中,拖航事故更占有較大比例。所以有必要對自升式生產(chǎn)儲卸油平臺濕拖性能進(jìn)行研究。本文以中國船舶及海洋工程設(shè)計(jì)研究院針對南海北部灣設(shè)計(jì)的一型自升式生產(chǎn)儲卸油平臺為研究對象,首先對無航速自升式平臺在規(guī)則波浪中進(jìn)行頻域分析,然后對由拖船-拖纜-自升式平臺組成的非線性拖航系統(tǒng)在真實(shí)拖航海況中進(jìn)行時域分析。具體的研究工作如下:1、自升式平臺波浪載荷和運(yùn)動響應(yīng)的頻域分析研究自升式生產(chǎn)儲卸油平臺無航速下在線性規(guī)則波中的頻域波浪載荷及其運(yùn)動響應(yīng),了解其初步運(yùn)動性能。在真實(shí)海況下對剖面垂向剪力、彎矩,六自由度響應(yīng)進(jìn)行短期預(yù)報;2、自升式平臺拖航系統(tǒng)濕拖影響因素分析在頻域分析的基礎(chǔ)上,通過AQWA-Drift模塊進(jìn)行時域耦合分析。綜合考慮濕拖中的影響因素:風(fēng)載荷、流載荷、拖纜長度、拖航速度、首尾傾、淺水效應(yīng)、風(fēng)浪流聯(lián)合作用等,探求了對拖航施工實(shí)踐較實(shí)用的結(jié)論。3、單船濕拖中運(yùn)動響應(yīng)機(jī)理及二階波浪力增阻分析將單船濕拖工況下的平臺運(yùn)動響應(yīng)進(jìn)行低頻、波頻分解,并計(jì)算全頻響應(yīng)能量譜,探討分析了平臺首搖、橫蕩長周期低頻響應(yīng)以及垂蕩、橫搖波頻運(yùn)動響應(yīng)機(jī)理;并對濕拖中的二階波浪力附加阻力進(jìn)行了參數(shù)敏感性分析。4、多船拖航數(shù)值模擬與分析介紹了六種多船拖航方案,并分析對比了其應(yīng)用范圍及其拖船配置。在單船拖航系統(tǒng)模型的基礎(chǔ)上,建立了多船拖航系統(tǒng)模型,并對雙船非平行拖中不同拖纜夾角,平行拖中不同拖纜距離進(jìn)行了優(yōu)化;分析了兩種不同三船拖航模式,并對其進(jìn)行了優(yōu)選。
[Abstract]:The jack-up production oil storage and unloading platform is one of the main equipment of offshore oil and gas production and plays an important role in relatively shallow waters especially in the production of marginal oil fields. After the construction of the jack-up platform, it must be transported to the working sea area, and the migration of the wellhead also needs towing construction. The common towing methods are dry and wet towing, in which dry towing is carried out by semi-submersible barge or semi-submersible transporter, and wet towing is carried out by the buoyancy of the platform itself with the help of the tugboat's pulling force. In general, dry drag is less difficult than wet drag. Up to now, among all the marine engineering plant accidents in the world, the proportion of jack-up platform is the highest, and towing accident occupies a large proportion in these accidents. Therefore, it is necessary to study the wet towing performance of self-lifting oil storage and unloading platform. In this paper, a type of jack-up production, storage and unloading platform designed by China Institute of ship and Marine Engineering for Beibu Gulf of the South China Sea is taken as the research object. Firstly, the frequency domain analysis of the no-speed jack-up platform in regular waves is carried out. Then, the nonlinear towing system composed of tugboat, towing cable and jack-up platform is analyzed in time domain. The specific research work is as follows: 1. The frequency domain analysis of wave load and motion response of the jack-up platform; the frequency domain wave load and its motion response of the jack-up oil storage and unloading platform in the linear regular wave without navigation velocity, and the preliminary motion performance of the platform are studied. In the real sea condition, the vertical shear force, bending moment and six degrees of freedom response of the profile are predicted in a short term. Based on the analysis of the influencing factors of wet towing system of the jack-up platform in frequency domain, the time domain coupling analysis is carried out through the AQWA-Drift module. Considering the influence factors of wet towing, such as wind load, current load, towing cable length, towing speed, head and tail tilting, shallow water effect, combined wind, wave and current, etc. This paper probes into the practical conclusion of the construction practice of towing. 3. The mechanism of motion response in wet towing of single ship and the second order wave force increase resistance analysis are used to decompose the motion response of platform under the condition of single ship wet towing, and calculate the energy spectrum of full frequency response. The mechanism of the long period low frequency response and the frequency response of the swaying wave and the rolling wave are discussed and analyzed. The parameter sensitivity analysis of the second order wave-force additional drag in wet towing is carried out. Six kinds of multi-ship towing schemes are introduced by numerical simulation and analysis of multi-ship towing, and their application scope and tugboat configuration are analyzed and compared. Based on the single-ship towing system model, the multi-ship towing system model is established, and the two different towing modes are analyzed. And the optimal selection is carried out.
【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE95

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本文編號：1929977