本文選題：非粘結(jié)柔性管　切入點：數(shù)值模擬　出處：《中國海洋大學(xué)》2015年碩士論文

【摘要】：海洋油氣資源開發(fā)系統(tǒng)是由海上作業(yè)平臺、水下生產(chǎn)系統(tǒng)以及多種管纜組合而成的,具有采油、集油、輸油等功能的系統(tǒng)。其中,管道是整個海洋油氣資源開發(fā)過程當(dāng)中最主要的運(yùn)輸方式。而非粘結(jié)柔性管,憑借其特殊的內(nèi)部結(jié)構(gòu)及良好的力學(xué)性能從各類管道結(jié)構(gòu)中脫穎而出,逐漸成為了海洋油氣資源開發(fā)過程中的主流運(yùn)輸設(shè)備。非粘結(jié)柔性管主要由骨架層、抗壓鎧裝層、拉伸鎧裝層、內(nèi)外護(hù)套以及防磨擦層等分別具有不同功能的多層材料組成。其內(nèi)部多層結(jié)構(gòu)是呈螺旋狀纏繞而成的,各層之間存在大量接觸與摩擦,導(dǎo)致了非粘結(jié)柔性管的非線性特性非常嚴(yán)重,使得我們在模擬和分析時存在很大難度。近年來,很多學(xué)者在提出特殊假設(shè)、進(jìn)行多種簡化的基礎(chǔ)之上,對非粘結(jié)柔性管進(jìn)行研究分析,但所得到的數(shù)據(jù)和結(jié)論用到實際工程中往往存在一定的偏差。另外,國外對這方面的技術(shù)嚴(yán)格保密,國內(nèi)的研究又起步較晚,致使國內(nèi)海洋油氣開采所用的管道被迫從國外高價采購,這嚴(yán)重影響了我國能源戰(zhàn)略和經(jīng)濟(jì)發(fā)展的進(jìn)程。因此,對非粘結(jié)柔性管道進(jìn)行局部力學(xué)性能分析和模擬計算,是為我國早日實現(xiàn)柔性管道自主化和量產(chǎn)化奠定基礎(chǔ)和提供依據(jù)的必要過程。本文首先介紹了非粘結(jié)柔性管的主要結(jié)構(gòu)形式和特點,并對國內(nèi)外研究現(xiàn)狀進(jìn)行了詳細(xì)的研究和總結(jié),整理出柔性管道計算所用的理論公式模型,并對有限元分析的方法理論進(jìn)行了介紹。在此基礎(chǔ)之上,參照國際上比較權(quán)威的實驗樣管參數(shù),運(yùn)用等效簡化的方式對各結(jié)構(gòu)層進(jìn)行了簡化,并通過對比選擇了合適的單元類型模擬各層結(jié)構(gòu),運(yùn)用通用有限元軟件ANSYS建立了三維的有限元模型并對其施加多種工況荷載進(jìn)行計算分析。最后,采用國外機(jī)構(gòu)所做試驗中已經(jīng)得到國際上認(rèn)可的實驗數(shù)據(jù),與理論公式計算所得結(jié)果以及有限元模擬計算分析結(jié)果進(jìn)行對比,以驗證建模的正確性,并得出相關(guān)結(jié)論,對工程應(yīng)用有一定的借鑒作用。
[Abstract]:Offshore oil and gas resources development system is composed of offshore operation platform, underwater production system and a variety of pipe cables. It has the functions of oil recovery, oil gathering, oil transportation and so on.Among them, pipeline is the most important transportation mode in the whole process of exploitation of offshore oil and gas resources.The non-bonded flexible pipe, with its special internal structure and good mechanical properties, has emerged from all kinds of pipeline structures, and has gradually become the mainstream transportation equipment in the development of offshore oil and gas resources.The unbonded flexible pipe is composed of several layers with different functions, such as skeleton layer, compression armor layer, tensile armor layer, inner and outer sheath and anti-friction layer.The internal multi-layer structure is spiral wound, and there are a lot of contact and friction between the layers, which leads to the serious nonlinear characteristics of the non-bonded flexible pipe, which makes it very difficult for us to simulate and analyze.In recent years, many scholars have studied and analyzed the unbonded flexible pipe on the basis of special assumptions and various simplifications. However, the data and conclusions obtained are often used in practical engineering.In addition, the foreign countries strictly keep secret the technology in this respect, and the domestic research starts relatively late, so the pipeline used in domestic offshore oil and gas exploitation is forced to be purchased from abroad at a high price, which seriously affects the energy strategy and the process of economic development of our country.Therefore, it is necessary to analyze and simulate the local mechanical properties of non-bonded flexible pipelines for the early realization of autonomous and mass production of flexible pipelines in China.In this paper, the main structure and characteristics of the unbonded flexible pipe are introduced, and the research status at home and abroad is studied and summarized in detail, and the theoretical formula model used in the calculation of the flexible pipeline is sorted out.The method theory of finite element analysis is also introduced.On this basis, referring to the international authoritative experimental sample tube parameters, the equivalent simplification method is used to simplify each structure layer, and the appropriate unit type is selected to simulate each layer structure by comparing and selecting the appropriate unit type.A three-dimensional finite element model is established by using the universal finite element software ANSYS and the loads applied to it are calculated and analyzed.Finally, the internationally recognized experimental data obtained from the experiments conducted by foreign institutions are compared with the results of theoretical formulas and finite element simulation analysis to verify the correctness of the modeling and draw relevant conclusions.It can be used for reference in engineering application.
【學(xué)位授予單位】：中國海洋大學(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：1690983