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非粘接动态柔性立管是深水海洋石油开发的重要设备,具备安装简便、可靠性高、抗疲劳性能强等诸多优点。非粘接动态柔性立管由多层非粘结结构形式缠绕而成,其截面刚度较低,在波浪和海流作用下运动幅值较大,因此柔性立管的构型和布置需要特殊研究,以免在极端情况下发生立管之间、立管与锚链之间的碰撞干涉。针对应用于中国南海海域的柔性立管,基于有限元法,采用Huse尾涡模型开展了干涉研究,并就柔性立管弯曲刚度、内部介质和拖曳力系数对干涉间距的敏感性做了分析,得到了对海洋立管工程有参考意义的结论。
Non-adhesive dynamic flexible riser is an important equipment for the development of deep-water offshore oil. It has many advantages such as easy installation, high reliability and strong anti-fatigue performance. Non-adhesive dynamic flexible risers are made of multi-layer non-bonded structure wound with low cross-section stiffness and large amplitude of motion under the influence of waves and currents. Therefore, the configuration and arrangement of flexible risers requires special study. Lest the collision between standpipes and risers and chains should occur in extreme situations. Based on the finite element method and the Huse wake vortex model, aiming at the problem of the flexible riser used in the South China Sea, the sensitivity of the flexible riser to bending stiffness, internal media and drag coefficient to the interference spacing is analyzed. Got the conclusion of reference to the marine riser project.