基于管道极限承载能力分析的深水S型铺管托管架基本设计研究

S型铺管托管架是铺管系统中的重要装备,起到支撑管道和引导管道入水的作用。其基本设计流程是一个复杂的循环过程,涉及铺管船推进力、张紧器张力、待铺设管道的尺寸和铺设水深等诸多参数的平衡和优选。本文基于下弯段管道在弯曲、拉伸和外压综合荷载作用下的极限承载能力分析,求解了铺管船推进力和张紧器拉力,并以此为边界条件推导了托管架长度的参数公式。以2500米水深铺设12英寸管道为例计算了所需的托管架曲率半径和设计长度,该计算方法可为S型铺管船托管架的基本设计提供参考。

Deepwater S-lay Pipelay Stinger Basic Design Study Based on the Ultimate Bearing Capacity Analysis of Submarine Pipe

Stinger is an important equipment for the submarine pipe S-lay operation, which supports the overbend pipe and guide it to pass downward the seabed. It is a complicated process to choose the appropriate parameters of pipelay vessel thruster force, tensioner tension, the pipe diameter and water depth, etc. Repeated optimizations are always needed to obtain the best values. The present gives a effective approach to find the suitable thruster force and tensioner tension based on the ultimate bearing capacity analysis of the submarine pipe under large bending, tension and external pressure. The stinger basic design parameter s equation is proposed. A practical deepwater S-lay stinger basic design case is carried out for the 2500m water depth to lay 12inch pipe.