本文選題：鋼懸鏈線立管 + 管土作用��； 參考：《浙江海洋學(xué)院》2015年碩士論文

【摘要】：隨著全球經(jīng)濟的高速發(fā)展,對石油天然等化石能源的需求每年成幾何倍數(shù)增長,陸地和近海油氣的開采已經(jīng)不能滿足日益增長的生產(chǎn)和生活需求。近年來,海洋油氣開采技術(shù)迅速革新,海洋油氣開采逐步走向深水(水深500m-1500m)、超深水(水深大于1500m)領(lǐng)域。鋼懸鏈線立管(SCR)作為深水油氣開發(fā)的一種立管選擇,有著良好的環(huán)境適應(yīng)性且成本較低。典型的SCR大致由懸垂段、觸地段、流線段組成。由于上部結(jié)構(gòu)物的運動和海洋環(huán)境載荷的影響,立管觸地點不斷發(fā)生運動,與海床反復(fù)作用,容易造成立管觸地區(qū)的疲勞破壞。觸地區(qū)管土作用機理與該區(qū)域疲勞分析一直是工程界的一個熱點問題。本文首先總結(jié)介紹了近年來國內(nèi)外SCR管土作用數(shù)值分析和試驗研究的進展和所取得的成果以及存在的不足之處。分析了立管所處海況環(huán)境,介紹了波浪、流等海洋載荷對立管以及上部浮體的作用情況,詳細闡述了不同荷載的計算方法;使用ABAQUS與OrcaFlex通過模擬安裝過程的方法得到立管初始靜態(tài)安裝形態(tài),并與通過傳統(tǒng)懸鏈線理論計算得到的形態(tài)進行對比,分析各種方法的準確性;通過海工專用軟件對立管進行簡單的動態(tài)分析,得出立管的易疲勞區(qū)域;然后介紹了管土作用的數(shù)值模型,對各個參數(shù)進行介紹,以此為基礎(chǔ),對立管進行整體動態(tài)分析,分析不同參數(shù),如海床土強度、立管上部浮體所處海況波高等因素對立管貫入海床的深度、貫入最深節(jié)點的位移時程、立管沿長度方向的彎矩、應(yīng)力等的影響;最后,設(shè)計兩套簡單易行的管土作用試驗裝置,進行小尺寸模型試驗,更加直觀的觀察管土作用。第一套設(shè)備對立管進行整體動態(tài)研究,通過OrcaFlex軟件對試驗結(jié)果進行驗證,證明試驗設(shè)備的準確性。第二套設(shè)備對立管觸地區(qū)進行局部分析,分析不同運動形態(tài),運動周期等對立管觸地區(qū)應(yīng)力的影響。
[Abstract]:With the rapid development of the global economy, the demand for fossil fuels such as oil and gas is increasing every year. The exploitation of land and offshore oil and gas can not meet the growing demand for production and life. In recent years, marine oil and gas mining technology has been rapidly innovating, and marine oil and gas mining has gradually moved into deep water (500m-1500m), and ultra deep water (deep water). Water depth is more than 1500m). Steel catenary riser (SCR), as a riser selection for deepwater oil and gas development, has good environmental adaptability and low cost. Typical SCR consists of draping section, touchdown section, and flow line section. The position of the riser is constantly moving and with the sea because of the movement of the superstructure and the load of the marine environment. The repeated action of the bed can easily cause the fatigue damage of the riser contact area. The action mechanism of the pipe and soil in contact with the region and the fatigue analysis of the region have been a hot issue in the engineering field. This paper first summarizes the progress of the numerical analysis and Experimental Research on the SCR tube and soil action at home and abroad in recent years and the achievements and shortcomings. This paper analyzes the sea condition environment in the riser, introduces the action of wave, flow and other marine load opposing tube and upper floating body, and expounds the calculation method of different loads in detail. Using ABAQUS and OrcaFlex through the simulation of installation process, the initial static installation of the riser is obtained, and the form obtained by the traditional catenary theory is calculated. Comparison and analysis of the accuracy of various methods; through the simple dynamic analysis of the antithesis pipe of the special software of the sea workers, the easy fatigue area of the riser is obtained. Then the numerical model of the pipe soil is introduced, and the various parameters are introduced. On this basis, the dynamic analysis of the whole body is carried out and the different parameters, such as the strength of the sea bed soil, are analyzed. The upper floating body is in the depth of the sea condition wave, which penetrates the depth of the sea bed, penetrates the displacement time of the deepest node, the bending moment of the vertical pipe along the length direction, and the stress, etc. Finally, the two sets of simple and easy tube soil test equipment are designed, and the small size model test is carried out to observe the effect of the pipe and soil more intuitively. The first set of equipment is antagonistic. The whole dynamic study of the tube was carried out. The test results were verified by OrcaFlex software, and the accuracy of the test equipment was proved. The local analysis of the second sets of antagonistic tube contact area was carried out to analyze the influence of the different movement forms and the movement cycle on the stress of the area.
【學(xué)位授予單位】：浙江海洋學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE95;P756.2
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本文編號：1958699