中国南海Spar平台悬链线立管的涡激振动研究

Study of Vortex-Induced Vibration of SCRs for a Spar Platform with the Application in South China Sea

立柱式平台(Spar平台)是一款适合深水及超深水应用的新型浮式平台,适于中国南海油气资源钻探、开发及生产。钢悬链线立管(SCR)因其结构简单、经济可靠,得到了广泛的应用。SCR的涡激振动(VIV)疲劳损伤关系到SCR及整个平台生产的安全。结合中国南海的环境条件,研究了用于Spar平台的SCR的涡激振动。主要介绍了立管的布置和形态,给出了18英寸(1英寸≈2.54cm)立管的VIV疲劳分析结果,并对关键参数进行了敏感性分析,为工程化立管设计提供了很好的参考依据。

Spar platform is a new type of floating platform for deep and ultra-deep water applications.It is suitable for the exploration,development and production of oil and gas in the South China Sea.Steel catenary risers（SCRs）are widely used allover the world due to its structure simplicity,high reliability and economy.SCR＇s fatigue damage caused by vortex-induced vibration（VIV）is vital to the safety of SCRs and the entire platform.We consider the environmental conditions in the South China Sea and study the VIV of SCRs for a Spar platform.The layout and configuration of SCRs are introduced at first.Then the VIV fatigue of 18-inch SCR is analyzed.Furthermore,the sensitivity of key parameters is investigated.This research will provide a good reference for deepwater riser design.