摘 要
海洋管道的鋪設(shè)方法主要有兩種：J型鋪設(shè)和S型鋪設(shè)。其中J型鋪設(shè)由于不需要托管架且鋪設(shè)安裝時管道的應(yīng)力更小而在深海鋪設(shè)時廣泛應(yīng)用。本文利用耦合分析的方法，對J型鋪管船體及錨泊系統(tǒng)的運動進行時域耦合分析，獲得船體、管道及系泊系統(tǒng)的動力響應(yīng)。主要研究內(nèi)容及成果概括如下：
1. 鋪管船體水動力性能研究。基于勢流理論，對鋪管船進行了數(shù)值分析，得到了鋪管船的附加質(zhì)量系數(shù)、阻尼系數(shù)以及頻響函數(shù)。
2. 鋪管船運動響應(yīng)以及錨泊力研究。在不同浪向角時，模擬了鋪管船的運動響應(yīng)以及錨泊力。
3. 鋪管對船體運動及錨泊力的影響研究。主要從兩個方面進行了研究：分析了不同浪向角作用下，管道對船體六個自由度運動以及錨泊力的影響；分析了不同規(guī)格管道對船體六個自由度運動以及錨泊力的影響。
4. 管道鋪設(shè)時的強度研究。主要從兩個方面進行了研究：選定了四種管道入水時的安裝預張力，研究了管道預張力對鋪管強度的影響；分析了四個波浪入射角作用下，對管道的張力和彎矩的影響。
經(jīng)過研究與分析，本文得到的主要結(jié)論有：
1. 船體在遭受0°至90°的入射波時，隨著浪向角的增大船體的縱蕩位移逐漸減小、橫蕩位移逐漸增大。90°入射時，系泊纜繩張力達到最大；
2. 考慮管道的影響后，船體的縱蕩、橫蕩和首搖運動現(xiàn)了明顯的變化，而船體的縱搖、垂蕩響應(yīng)并不敏感；系泊系統(tǒng)兩根錨纜錨端張力稍微變大，其他六根錨纜繩張力都有明顯變小，總體上呈現(xiàn)減小的趨勢；管道濕重與管道的初始張力之間存在著明顯的關(guān)系，濕重越大，管道張力越大，對船體的運動和錨泊系統(tǒng)也越大。
3. 管道的軸向應(yīng)力隨著預張力的增大而增大，彎曲應(yīng)力、合成總應(yīng)力隨著預張力增大而減??；彎曲應(yīng)力在管道總應(yīng)力起主導作用；船體在遭受0°至90°的入射波時，隨著浪向角的增大管道的張力和彎矩逐漸增大。
關(guān)鍵詞：海底管道；錨泊系統(tǒng)；J型鋪管船；動力響應(yīng)








Abstract
There are two main methods of laying marine pipe: J-lay and S-lay. J-lay is widely used in deep sea as it does not require stinger and its laying stress is much smaller. This paper analyzes the J-Lay pipe lay and the Mooring system using the coupling analysis method, and the dynamic response of vessel, pipes and mooring system been obtained. The main research contents and results are summarized as follows:
1. Research on the hydrodynamic characteristics of the vessel. Based on the potential flow theory, this paper take a numerical analysis on floating platform, and get the added mass, damping and RAO of the vessel.
2. Research on the hydrodynamic performance of the vessel and mooring system. Motion performance of the vessel and tension of the lines are simulated with different incoming wave angles.
3. Research on the hydrodynamic performance of the vessel and mooring system when pipe-laying. Mainly research two conditions to analyze the impact of vessel movement and the tension of the lines. One is considering different kinds of pipes, the other considering different incident waves.
4. Research on the strength of the pipeline when laying the pipe. Different pre-tension and different incident waves when pipe-laying are considered to discuss the comparison of the pipeline strength.
Through researching and analysis, the main conclusions of this paper are obtained as follows:
1. With the wave direction angles increasing, the surge movement becomes smaller and the sway movement is just the opposite when the vessel subjected to the incident wave with the angle of 0° to 90°. As the angle reached 90°, the tension of the mooring liner gets the maximum.
2. There is a significant change of sway、surge and yaw when considering the impact of the pipeline; the pipeline has a significant influence on the mooring system. The tension of two lines become slightly larger and other six lines are significantly smaller; there is a significant relationship between wet weight of the pipeline and the pre-tension of the pipeline, the greater Wet weight is, the larger the tension is;then the impact of vessel motion is larger.
3. The axial stress of pipeline gets larger as the pre-tension increases, and the bending stress and the combine stress are just the opposite. Bending stress plays a leading role in total stress of pipeline. With the wave direction angles increasing, the tension and bending moment become larger when the vessel subjected to the incident wave with the angle of 0°to 90°; The stress of pipeline is been influenced directly by the heave motion.
Key words : Submarine pipeline；Mooring system；J-Lay pipelay; Dynamic response

目 錄
摘 要 I
ABSTRACT III
目 錄 V
CONTENTS VII
第一章 緒論 1
1.1深海油氣開發(fā)現(xiàn)狀 1
1.2管道鋪設(shè)方法 2
1.2.1 S型鋪設(shè)法 2
1.2.2 J型鋪設(shè)法 4
1.2.3 卷管法 6
1.3 鋪管船水動力研究進展 7
1.4 本文研究內(nèi)容 8
第二章 波浪載荷的計算 9
2.1 三維浮體波浪載荷頻率方法 9
2.2 邊界條件 9
2.2.1 水底條件 10
2.2.2 自由表面條件 10
2.2.3 物面條件 11
2.2.4 遠方輻射條件 11
2.3入射波速度勢的求解[24] 11
2.4輻射速度勢的求解 12
2.5繞射速度勢的求解 14
2.6船體運動方程的建立 15
第三章 船體的水動力計算 17
3.1 水動力系數(shù) 17
3.2 鋪管船的水動力性能分析 19
3.2.1 鋪管船的水動力模型 19
3.2.2鋪管船體的水動力系數(shù) 20
3.2.3 船體的頻響函數(shù) 22-br..