建立了带浮力块深水钻井隔水管安装过程力学分析模型,采用ABAQUS有限元软件对带浮力块的深水钻井隔水管在安装过程中的静态力学性能进行分析,研究了浮力块配置方案、浮力系数、浮力块长度和浮力块外径对隔水管横向变形及应力的影响。研究结果表明,深水钻井隔水管安装过程中危险截面始终位于隔水管与浮式钻井设备连接处;浮力块与隔水管裸单根宜采取交错布置的方案;隔水管安装过程中产生的横向变形与危险截面处的应力均随浮力系数、浮力块长度与浮力块外径的增大而增大;超过一定水深后隔水管Mises等效应力随水深增加呈线性减小。
A model has been built for mechanical analysis on vertical and horizontal bending deformation of deepwater drilling riser equipped with a buoyancy module in the installation and ABAQUS finite element software has been used to analyze static mechanical property of deepwater drilling riser equipped with a buoyancy module in the installation, in order to study influences of buoyancy module configuration, buoyancy coefficient, buoyancy module length and buoyancy module OD on lateral deformation and stress of the drilling riser. Study results show that, dangerous section is always at the connection between the riser and the floating drilling equipment during in- stallation of the deepwater drilling riser; the buoyancy module and single bare riser should adopt staggered layout; lateral deformation of the riser during installation and stress on the dangerous section increase with buoyancy coeffi- cient, buoyancy module length and buoyancy module OD; Mises equivalent stress of the riser decreases linearly with water depth increasing after exceeding a certain water depth.