CAJ | 학술논문

针对在1,500,m水深以卷管法安装管中管的过程进行了数值模拟．建立了管中管横截面的平面应变有限元模型，研究内外管之间的相互作用，将接触力和变形关系等效为内外管之间的非线性接触属性；建立了整体有限元模型进行管中管的安装分析，研究了内外管的受力和弹塑性变形，并研究了安装过程造成的内外管之间保温层厚度的折减．结果表明，外管承受了主要的拉力，内外管在安装中发生两次弹塑性应力-应变循环，内管和外管产生最大的累积塑性应变分别为4.13%和5.07%；安装完成后保温层最大的厚度折减为26.2%．
침대재1,500,m수심이권관법안장관중관적과정진행료수치모의．건립료관중관횡절면적평면응변유한원모형，연구내외관지간적상호작용，장접촉력화변형관계등효위내외관지간적비선성접촉속성；건립료정체유한원모형진행관중관적안장분석，연구료내외관적수력화탄소성변형，병연구료안장과정조성적내외관지간보온층후도적절감．결과표명，외관승수료주요적랍력，내외관재안장중발생량차탄소성응력-응변순배，내관화외관산생최대적루적소성응변분별위4.13%화5.07%；안장완성후보온층최대적후도절감위26.2%．
The installation procedure with reel-lay was simulated numerically for a pipe-in-pipe(PIP)in an oil field of 1,500,m in water depth. The interaction between the carrier pipe and the flowline was studied by carrying out plane strain analysis of PIP cross-section. Accordingly,the relationship between contact force and displacement was equivalent to the nonlinear contact property between the carrier pipe and the flowline. Finite element model was set up to simulate the installation procedure of PIP with reel-lay. The aims are to investigate the load effect and elastic-plastic deformation of PIP and quantify the thickness reduction of insulation layer between pipes during installation process. The results show that most of the tension force is taken by the carrier pipe. Moreover,it is found that two cycles of elastic-plastic stress and strain occur with the maximum accumulated plastic strain of 4.13% and 5.07% for the flowline and the carrier pipe,respectively. The maximum thickness reduction of the insulation layer after installation is 26.2%.