海底管道在刚性扣入式止屈器中的屈曲传播理论研究  

Theoretical study of buckling propagation of subsea pipelines with rigid slip-on arrestors

作　　者：马维林[1,2] 余建星[3] 张鑫[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [3]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》2016年第10期1353-1358,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51609222);中央高校基本科研业务费专项(201513039);大连理工大学海岸和近海工程国家重点实验室开放基金项目(LP1505);天津大学水利工程仿真与安全国家重点实验室开放基金项目(HESS-1602)

摘　　要：为了从理论上研究海底管道在扣入式止屈器中的屈曲传播问题,建立了二维管道环模型,并运用非线性离散弹簧模型来模拟管道内壁以及管道外壁与止屈器内壁之间的接触作用。理论模型中考虑了结构的非线性几何大变形和弹塑性本构关系,利用虚功原理建立了平衡方程,计算研究了海底管道在刚性扣入式止屈器中屈曲传播时的外压-截面积变化规律,然后基于Maxwell能量平衡法确定了扣入式止屈器的穿越压力下限。通过将理论计算结果与全比例管道试验和有限元数值模拟进行对比,证明了该理论方法的正确性,本理论模型为进一步研究三维管道模型的屈曲传播和止屈机理奠定了基础。In order to theoretically study buckling propagation of subsea pipelines with slip-on arrestors,a two- dimensional ring model was used to represent the pipeline and a nonlinear discrete spring model was adopted to simulate the contact between a pipeliners inner walls and between a pipeliners outer wall and an arrestorrs inner wall. The theoretical model considered a large geometric deformation and the elastic-plastic constitutive relation of material ,a balance equation was established on the basis of the principle of virtual work. The variation of external pressure with respect to the pipeliners cross-sectional area was analyzed,and the lower bound of the crossing pressure of the slip-on arrestor was calculated on the basis of Maxwell＇s energy balance method. By comparing the theoretical results with the full-scale pipeline test and finite element numerical simulation,the theoretical method proved to be correct and reliable. The theoretical model presented in this paper lays the foundation for further research on buckling propagation and the arresting mechanism of three-dimensional models of pipelines.

关 键 词：海底管道 屈曲传播 接触作用 扣入式止屈器 穿越压力 

分 类 号：P756.2[天文地球—海洋科学]