深海双层管道温度效应分析  

Research on the temperature effect of the deep-sea pipe-in-pipe

作　　者：刘凯月 陈志华[1,2] 刘红波[1] 黄金超 张泽超 李砚波[1] LIU Kaiyue;CHEN Zhihua;LIU Hongbo;HUANG Jinchao;ZHANG Zechao;LI Yanbo(Department of Civil Engineering, Tianjin University, Tianjin 300072, China;State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《哈尔滨工程大学学报》2019年第8期1462-1467,共6页Journal of Harbin Engineering University

基　　金：国家重点基础研究发展计划(2014CB046801)

摘　　要：为了验证有限元计算结果精确性,为深海双层管道系统的有限元计算提供有效方法,本文利用ITT单元以及非线性弹簧单元来建立双层管道模型,与解析解结果进行对比。利用建立的有限元模型,对双层管道进行不均匀温度场的参数化分析,给出不同温度场工况下管道系统的轴向效应分布情况,并将分析对象设定为长度不同的2种管道体系,分别对管道系统的锚固段变化趋势和锚固点移动进行分析,得到切合实际情况的计算结果。研究表明:引入ITT单元和非线性弹簧单元建立的双层管道模型对模拟双层管道不均匀温度效应研究具有更好的精确性,证实了在不均匀温度场作用下,双层管道内外管通过对中环保持了变形的协同性。The ITT and nonlinear spring elements are used to establish a pipe-in-pipe model to provide an effective method for the finite element calculation of the deep-sea double-layer pipeline system. The accuracy of the finite element calculation results is verified through comparison with analytical solutions. A finite element model is constructed for the parameterized analysis of the effects of a nonuniform temperature field on the pipe-in-pipe by deriving the axial stress distribution of pipes in a nonuniform temperature field. Long pipes and short pipes are taken as analytical objects to investigate the trend followed by the changes in anchoring point and anchoring length and to obtain calculation results that are in line with the actual situation of the deep sea. Research results show that the accuracy of the model that introduces the ITT and nonlinear spring elements in the simulation of the nonuniform temperature effect of the PIP has improved. These results prove that the inner and outer pipes of the pipe-in-pipe maintain the coordination of deformation through the bulkhead under the action of a nonuniform temperature field.

关 键 词：双层管道 有限元计算 不均匀温度场 温度应力 轴向位移 ITT单元 对中环 

分 类 号：TE973[石油与天然气工程—石油机械设备]