钻井立管下放安装过程中涡激振动响应实验研究  

Experimental Study on Vortex Induced Vibration Response of Drilling Riser During Lowering and Installation

作　　者：李效民[1] 柳润波 顾洪禄 李福恒 郭海燕[1] Li Xiaomin;Liu Runbo;Gu Honglu;Li Fuheng;Guo Haiyan(College of Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2023年第10期63-73,共11页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(51979257);山东省自然科学基金项目(ZR2019MEE032)资助。

摘　　要：为研究海流作用下钻井立管在下放安装过程中的涡激振动(Vortex-induced vibration,VIV)响应特性,本文基于光纤光栅应变传感器技术,考虑立管下部组件(Lower marine risers package,LMRP)设计制作了多种钻井模型立管,对其下放安装过程中自由悬挂状态下的动力响应进行了水槽实验研究。实验制作了具有移动滑轨的下放装置,测试得到了0.4 m/s的均匀水流下模型立管动态应变响应时程曲线,并基于有限元法求得立管模型的固有频率和振型函数,再利用模态叠加法重构了立管模型位移响应。分析结果表明:立管在横流向(Cross-line,CF)的应变大于顺流向(In-line,IL)的应变,但两个方向的频率相同;自由端顺流向位移随LMRP质量增大而减小,但当质量超过管重时位移变化趋于稳定;自由端最大振幅受底部LMRP质量的影响较小,约为立管最大振幅的十分之一。In order to study the response characteristics of vortex-induced vibration(VIV)during the installation of drilling riser under sea current,several drilling model risers were made based on the fiber Bragg grating strain sensor technology and considering the lower marine riser package(LMRP),and the dynamic response under free suspension during the installation process was studied by flume experiment.A lowering device with a moving slide rail was made in the experiment.The dynamic strain response of model riser under uniform flow of 0.4 m/s is obtained.The natural frequency and vibration mode function of the riser model were obtained based on the finite element method,and the displacement response of the riser model was reconstructed using the mode superposition method.The analysis results show that the strain of the riser in the cross-line(CF)is greater than that in the in-line(IL),but the frequency of the two directions is the same;The downstream displacement of the free end decreases with the increase of the LMRP mass,but the displacement changes tend to be stable when the mass exceeds the pipe weight;The maximum amplitude at the free end is independent of the LMRP mass at the bottom,which is about one tenth of the maximum amplitude of the riser.

关 键 词：钻井立管 安装下放 立管下部组件 模态叠加法 涡激振动 

分 类 号：TU311.3[建筑科学—结构工程]