A prediction for and control of the response of a flexible tube for production of oil/gas with inner fluid

在未来的深海海洋开发中，对采用柔性管的立管系统和传统的钢质立管系统进行了研究，预测了流体中立管运动的外力变大，以及该系统中浮动平台的潮汐、波浪和运动等外力。为此，我们制作了10m硅片柔性立管模型，并在水箱中进行了实验，得到了流量、振动和形状之间的关系，并建立了计算模型进行分析。

On an ocean development in the deep sea in the future, the introduction of the riser system using the flexible tube is examined as well as a conventional steel riser system.It is predicted that external force by the motion of riser inside fluid becomes large as well as the external force such as a tide, waves and motions of the floating platform in this system. Therefore we produced 10m flexible riser model made by silicon and carried out the experiment in the water tank which showed the relationships among the flow quantity, the vibration and the shape and developed computational model for the analysis.