本文選題：管道鋪設　切入點：S-Lay　出處：《華南理工大學》2015年碩士論文

【摘要】：隨著地球陸地能源的日益衰竭,海洋油氣資源愈來愈受到世界各國的重視。海底管道是海洋油氣資源開發(fā)、運輸系統(tǒng)中的一個至關重要的部分,因此被石化行業(yè)稱為油氣資源開發(fā)的生命線。隨著我國海洋油氣資源的進一步的開發(fā)利用,海底輸運管道的需要量將會不斷增大。由于海況復雜多變,海底管道在鋪設的過程中同時受到彎矩、張力、海流力和靜水壓力的共同作用,其結構安全性受到巨大的挑戰(zhàn),因此開展深海管道鋪設過程中的力學狀態(tài)研究顯得尤為重要。本文利用桿的大變形理論建立了管道的非線性控制微分方程,進而利用奇異攝動理論對S-Lay鋪管法以及J-Lay鋪管法的管道構型和受力狀態(tài)進行了系統(tǒng)的研究,并得到了奇異攝動的理論解。為了證明理論解的正確性,本文利用有限元法對管道鋪設過程進行了有限元分析,結果表明,有限元解和奇異攝動解吻合較好。同時,在理論研究的基礎上,利用奇異攝動分析程序對S-Lay和J-Lay進行鋪管參數敏感性分析,概況了不同工況下管道張緊力、海水深度以及海流力的變化對管線構型和受力狀態(tài)的影響,提出了深海管道鋪設過程中的指導性建議,為深海管道鋪設作業(yè)提供了理論參考。最后,本文聯合Delphi語言和MATLAB軟件開發(fā)了海底管道鋪設軟件,該軟件界面友好,計算快速,可以方便快捷地進行鋪管設計。本論文的主要研究工作可以概況為以下幾個方面:(1)系統(tǒng)介紹了國內外海底管道鋪設的背景和意義,特別詳細介紹了S-Lay鋪管和J-Lay鋪管的特點、受力性能以及國內外相關的研究成果;(2)本文在考慮了海流荷載以及管道截面的Brazier效應的基礎上,利用桿的大變形理論得到了海底管道鋪設過程中的非線性控制微分方程,并利用奇異攝動理論得到了管道構型的近似理論解,為管道鋪設提供了理論上的依據;(3)采用有限元方法對深海管道鋪設過程進行了數值仿真,通過有限元解和奇異攝動解的對比,驗證本文內容的正確性和合理性;(4)運用奇異攝動理論近似解開發(fā)了計算分析軟件,為鋪管設計提供了一種方便快捷的途徑;同時運用該程序分別對S-Lay鋪管法和J-Lay鋪管法進行了相關參數的敏感性分析。
[Abstract]:With the increasing depletion of terrestrial energy sources, offshore oil and gas resources have been paid more and more attention in the world. Submarine pipeline is an important part of marine oil and gas resources development and transportation system. Therefore, the petrochemical industry calls it the lifeline of oil and gas resources development. With the further development and utilization of offshore oil and gas resources in China, the requirements of submarine transportation pipelines will continue to increase. At the same time, the submarine pipeline is subjected to the joint action of bending moment, tension, sea current force and hydrostatic pressure, and its structural safety is greatly challenged. Therefore, it is very important to study the mechanical state in the course of deep sea pipeline laying. In this paper, the nonlinear control differential equation of pipeline is established by using the theory of large deformation of rod. Furthermore, the configuration and stress state of S-Lay and J-Lay pipe laying methods are systematically studied by using singular perturbation theory, and the theoretical solutions of singular perturbation are obtained to prove the correctness of the theoretical solutions. In this paper, the finite element method is used to analyze the pipeline laying process. The results show that the finite element solution is in good agreement with the singularly perturbed solution. The sensitivity analysis of pipe laying parameters for S-Lay and J-Lay was carried out by using singular perturbation analysis program. The effects of pipeline tensioning force, sea water depth and sea current force on the configuration and stress state of pipeline under different working conditions were summarized. The guiding suggestions in the course of deep sea pipeline laying are put forward, which provides a theoretical reference for the deep sea pipeline laying operation. Finally, this paper combines Delphi language and MATLAB software to develop the submarine pipeline laying software, which has friendly interface and quick calculation. The main research work of this paper can be summarized as follows: 1) the background and significance of submarine pipeline laying at home and abroad are introduced, especially the characteristics of S-Lay and J-Lay laying are introduced in detail. Based on the consideration of the current load and the Brazier effect of the pipeline section, the nonlinear control differential equations in the laying process of the submarine pipeline are obtained by using the large deformation theory of the rod. The approximate theoretical solution of pipeline configuration is obtained by using singular perturbation theory, which provides a theoretical basis for pipeline laying. By comparing the finite element solution with the singular perturbation solution, the correctness and rationality of this paper are verified. (4) the calculation and analysis software is developed by using the approximate solution of the singular perturbation theory, which provides a convenient and quick way for the pipe laying design. At the same time, the sensitivity of the related parameters of S-Lay method and J-Lay method are analyzed by using this program.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE973.92

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