基于有限元分析的卷管法管道安装实时研究

采用卷管法铺设管道时,管道和铺设设备之间的接触作用十分复杂,并且管道在弯曲过程中将会产生塑性变形并可能发生局部屈曲,导致管道失效。基于有限元模型(FEM)实时模拟卷管法安装的整个过程,研究管道与铺设设备之间的接触作用;分析管道对于环境载荷和船体运动的动态响应;获得管道的应力应变值以校核局部屈曲。研究结果表明,管道弯矩大部分来源于管道与安装设备间的接触作用,而环境载荷及船体运动对管道的弯曲应力影响较小。

Real time simulation of subsea pipe installation with reel-lay

During the pipe installation with reel-lay method, the interaction between the pipe and the reel-lay equipments is complex. It is also known that the pipe undergoes plastic strain during reeling and is subject to local buckling. To address these problems as a case study, the whole procedure of pipe reeling and pipe laying was simulated with finite element model (FEM) in real time paying special attention to the contact interaction between the pipe and the equipments. For the real time simulation, three scenarios were considered to investigate the dynamic response of the pipe to the environmental loads and laying vessel motion during pipe laying. The maximum strain of the pipe was compared with analytical results to check if there was local buckling. The results show that most of the bending moment comes from the contact interaction between the pipe and the equipments, and that the pipe stress isn??t so sensitive to the environmental loads.