本文選題：海底纜線 + 運動特性��； 參考：《上海交通大學》2015年碩士論文

【摘要】：隨著海洋資源的不斷開發(fā)利用,海底纜線敷設技術在商業(yè)經(jīng)濟、軍事戰(zhàn)略等領域的關鍵性優(yōu)勢日益凸顯,吸引越來越多的專家學者致力于該方面的研究�；诤Ｑ蟓h(huán)境的復雜性與惡劣性,盡管歷經(jīng)一個多世紀的發(fā)展,海底纜線敷設工程仍有很多運動和控制問題亟需解決。為確保敷設作業(yè)的安全可靠,精確的仿真模擬必不可少。通常在敷纜作業(yè)中,海底纜線除受重力、浮力、慣性力及附加質(zhì)量力等荷載作用,還會受到航行速度、放纜速度、流速分布等施工條件的影響。本文主要以海底纜線為研究對象,在前人研究成果的基礎上,針對海底纜線在敷設過程中的運動特性和受力情況進行理論分析,建立海底纜線張力計算模型,分析海纜張力狀態(tài)。通過數(shù)值模擬,研究海纜張力與各個外界因素之間的關系,總結(jié)海纜張力計算公式,準確預測敷設過程中張力分布規(guī)律及水中位形變化趨勢。本文假定海底纜線為理想柔性結(jié)構(gòu)物,忽略彎曲剛度影響,考慮軸向拉伸變形。分析海纜各種作用荷載,基于受力平衡,建立海底纜線三維動力學方程。采用有限差分法對纜線進行單元離散,將偏微分控制方程轉(zhuǎn)換為一組常微分運動方程。借助MATLAB程序,采用四階龍格庫塔積分進行數(shù)值積分求解。結(jié)合邊界條件和初始條件,針對余量敷纜和張力敷纜兩種不同的施工作業(yè)進行數(shù)值模擬。通過與前人的試驗數(shù)據(jù)和已取得的研究成果進行對比分析,驗證該數(shù)學模型的正確性及適用性。最后,本文針對余量敷纜作業(yè),對海底通訊光纜在敷設過程中的運動特性進行仿真模擬,研究海底纜線在敷纜船運動狀態(tài)變化時的動態(tài)響應。并結(jié)合海南聯(lián)網(wǎng)工程項目,對海底電力電纜敷設作業(yè)進行穩(wěn)態(tài)分析,詳細討論了各關鍵參數(shù)對纜線敷設作業(yè)的具體影響,其中包括航行速度、流速分布及海底張力,給出了規(guī)律性結(jié)論。計算結(jié)果表明:航行速度、流速分布、海底張力、纜線自重對其位形曲線影響比較顯著;而海纜張力主要取決纜線自重、敷設水深和切向拖曳力系數(shù)。
[Abstract]:With the continuous development and utilization of marine resources, the key advantages of submarine cable laying technology in commercial economy, military strategy and other fields have become increasingly prominent, attracting more and more experts and scholars to devote themselves to the research in this field.Because of the complexity and evil of marine environment, despite the development of more than a century, there are still a lot of motion and control problems to be solved in submarine cable laying engineering.In order to ensure the safety and reliability of laying operation, accurate simulation is essential.In the cable laying operation, the submarine cable is affected not only by gravity, buoyancy, inertia force and additional mass force, but also by the construction conditions such as the speed of navigation, the velocity of cable release and the distribution of velocity.This paper mainly takes submarine cable as the research object, on the basis of the previous research results, carries on the theoretical analysis to the submarine cable in the laying process movement characteristic and the force situation, establishes the submarine cable tension calculation model.The tension state of submarine cable is analyzed.Through numerical simulation, the relationship between cable tension and external factors is studied, the formula of cable tension calculation is summarized, and the distribution law of tension and the changing trend of configuration in water are predicted accurately.In this paper, it is assumed that the submarine cable is an ideal flexible structure, and the influence of bending stiffness is ignored, and the axial tensile deformation is considered.The three dimensional dynamic equations of submarine cable are established based on the analysis of various loads of submarine cable.The finite difference method is used to discretize the cable line, and the partial differential control equation is transformed into a set of ordinary differential equations of motion.With the help of MATLAB program, the fourth order Runge-Kutta integral is used to solve the numerical integration.Combined with boundary conditions and initial conditions, numerical simulation is carried out for two different construction operations: residual cable laying and tension cable laying.The correctness and applicability of the mathematical model are verified by comparing and analyzing the experimental data and the research results.Finally, this paper simulates the motion characteristics of submarine optical fiber cable during the laying process, and studies the dynamic response of submarine cable when the motional state of cable laying ship changes.Combined with Hainan network project, the steady state analysis of submarine power cable laying operation is carried out, and the influence of key parameters on cable laying operation is discussed in detail, including navigation speed, velocity distribution and submarine tension.The regular conclusion is given.The results show that the navigation velocity, velocity distribution, submarine tension and cable weight have significant effects on the configuration curve, while the cable tension mainly depends on the cable weight, laying depth and tangential towing force coefficient.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P756.1

【共引文獻】

相關期刊論文 前1條

1 李春柳;張懷慧;陳小山;;深水網(wǎng)箱沉子在純流作用下的水動力特性[J];大連水產(chǎn)學院學報;2006年01期

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