【摘要】：鉆井隔水管系統(tǒng)是深海油氣勘探開發(fā)的關(guān)鍵海工裝備,由于構(gòu)件細(xì)長(zhǎng)、中間缺少有效支撐,所以也是極易失效破壞的構(gòu)件之一。因此對(duì)鉆井隔水管進(jìn)行動(dòng)力響應(yīng)及累積疲勞損傷研究顯的尤為重要。本論文以FDPSO鉆井隔水管為研究對(duì)象,重點(diǎn)研究了鉆井隔水管在波浪海流聯(lián)合作用下的動(dòng)力響應(yīng)和疲勞性能,主要內(nèi)容包括：1)按照API規(guī)范對(duì)鉆井隔水管長(zhǎng)度進(jìn)行設(shè)計(jì)、浮力塊配置、頂張緊力確定等；2)使用Orcaflex軟件對(duì)隔水管在波浪和海流聯(lián)合作用下的動(dòng)力特性進(jìn)行計(jì)算分析；3)采用確定性不規(guī)則波法,使用Orcaflex軟件對(duì)波浪導(dǎo)致的鉆井隔水管疲勞損傷進(jìn)行計(jì)算分析；4)對(duì)鉆井隔水管在海流作用下的渦激振動(dòng)進(jìn)行計(jì)算分析；5)使用shear7軟件對(duì)渦激振動(dòng)導(dǎo)致的鉆井隔水管疲勞損傷進(jìn)行分析；6)采用Miner準(zhǔn)則對(duì)鉆井隔水管累積疲勞損傷進(jìn)行計(jì)算研究。結(jié)果表明：2000 m水深鉆井隔水管在波浪和海流的聯(lián)合作用下,其底部撓性接頭轉(zhuǎn)角、隔水管等效應(yīng)力等滿足規(guī)范校核要求。通過(guò)進(jìn)行波致疲勞損傷、渦激振動(dòng)致疲勞損傷和累積疲勞損傷分析研究,發(fā)現(xiàn)渦激振動(dòng)致疲勞損傷占據(jù)隔水管總損傷主導(dǎo)地位,直接控制整個(gè)鉆井隔水管系統(tǒng)的疲勞損傷。
[Abstract]:Drilling riser system is the key marine equipment for deep-sea oil and gas exploration and development. Because of the slender components and the lack of effective support in the middle, drilling riser system is one of the components that are vulnerable to failure. Therefore, it is very important to study the dynamic response and cumulative fatigue damage of drilling riser. This paper focuses on the dynamic response and fatigue performance of FDPSO drilling riser under the combined action of wave and current. The main contents are as follows: 1) the length of drilling riser is designed according to API code. Buoyancy block configuration, top tensioning force determination, etc. 2) using Orcaflex software to calculate and analyze the dynamic characteristics of the riser under the combined action of wave and current, 3) using the deterministic irregular wave method and using the Orcaflex software to calculate and analyze the fatigue damage of the drilling riser caused by the wave; 4) calculating and analyzing the vortex-induced vibration of drilling riser under the action of ocean current, 5) using shear7 software to analyze the fatigue damage of drilling riser caused by vortex-induced vibration; 6) the cumulative fatigue damage of drilling riser is calculated by Miner criterion. The results show that under the combined action of wave and current, the angle of the bottom flexible joint and equivalent stress of the riser can meet the requirements of code checking. Through the analysis of wave induced fatigue damage, vortex-induced fatigue damage and cumulative fatigue damage, it is found that vortex-induced vibration fatigue damage dominates the total damage of the riser and directly controls the fatigue damage of the whole drilling riser system.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U674.381

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