海底管道海上对接过程非线性分析与仿真研究  

Submarine Pipeline Sea Docking process Nonlinear Analysis and Simulation

作　　者：伦冠德[1] 刘衍聪 

机构地区：[1]潍坊学院,山东潍坊261061 [2]中国石油大学,山东青岛266580

出　　处：《潍坊学院学报》2013年第2期1-8,共8页Journal of Weifang University

基　　金：国家高科技研究发展规划(863)资助项目(2006AA09A104)

摘　　要：基于对海上对接过程管道的受力分析,应用非线性梁理论建立了海上对接管道数学模型,探讨了非线性有限元方程的求解方法及其收敛准则。以建立的模型为基础,研究了海上对接过程中管道最大应力变化规律及其影响因素。研究结果表明:在提吊阶段,管道应力迅速增大到较高应力水平;在管端调平对接阶段,管道最大应力变化较小,并呈近似线性上升,整体应力水平保持在管道提吊后期的较高应力状态;沉放阶段管道最大应力存在较大波动,并可能出现应力峰值,但管道整体最大应力呈下降状态。管道在沉放过程中的最大应力变化较大,若沉放控制方案不合理,管道的屈曲破坏极易发生在这个阶段。工程船的侧移与吊缆的释放协调配合,可有效控制管道的最大应力的波动范围。沉放阶段,横向水流明显提高管道的整体应力水平。因此,管道海上对接施工应尽量避免在大的横向水流条件下进行。Based on the process of sea docking pipe stress analysis, the application of the theory of non-linear beam established sea docking pipeline mathematical model, discusses the solution of the nonlinear finite element equation method and its convergence criteria. With the model as the foundation, study the sea docking process, the maximum stress change rule and its influencing factors. The results show that： Pipe stress in the lifting pipe stage rapidly increase to a higher level. Pipe in the leveling docking stage the maximum stress of pipe small changes, and with the approximate linear rise, the overall stress level keep in pipeline lifting later stage higher stress state. The maximal stress of pipe on lay-down stage large fluctuations, and the peak stress may occur, but integral pipeline maximum stress state of decline. In the process of the pipeline laying- down maximum stress change is larger; if lay-down control scheme is not reasonable pipe buckling failure easily happened in this stage. The lateral of engineering ship with the release of suspended ropes coordination can effectively control the maximum stress fluctuation of the pipe. On laying-down stage, the lateral flow obviously increases the whole pipe level of stress. Therefore, pipeline construction should try to avoid sea docking in big lateral flow conditions.

关 键 词：海底管道 海上对接 非线性分析 仿真 

分 类 号：TE832[石油与天然气工程—油气储运工程]