海底管道整体式止屈器性能研究与穿越压力预测  

Performance and crossover pressure of integral buckle arrestors for offshore pipelines

作　　者：徐万海[1] 庞涛 闫术明[2] 刘其民[2] 李国辉[2] XU Wanhai;PANG Tao;YAN Shuming;LIU Qimin;LI Guohui(State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;China Petroleum Pipeline Engineering Corporation, Langfang 065000, China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]中国石油天然气管道工程有限公司,河北廊坊065000

出　　处：《海洋工程》2022年第3期22-31,共10页The Ocean Engineering

基　　金：国家自然科学基金项目(51979163)。

摘　　要：整体式止屈器可有效抑制海底管道屈曲传播并避免管道的大规模屈曲失效。为探究整体式止屈器的止屈特性,预测其穿越压力,利用ABAQUS软件建立有限元模型,分析了整体式止屈器厚度、长度、径厚比等参数对穿越压力和穿越形式的影响机制,揭示了整体式止屈器的止屈特性。研究结果表明:在平行穿越阶段,增加止屈器厚度、有效长度可明显提升穿越压力;而在垂直穿越阶段,穿越压力增长速率明显放缓。结合有限元模拟结果,拟合得到了整体式止屈器在不同穿越形式下的穿越压力预测公式,其相较于已有经验公式准确性更高,对整体式止屈器的设计和建造具有重要的指导意义。Integral buckle arrestors can effectively suppress the buckling propagation of the submarine pipeline and avoid large-scale buckling failure.In order to explore the buckle arresting characteristics of integral buckle arrestors and predict the crossover pressure,a finite element model was established in ABAQUS.By analyzing the influence of integral buckle arrestors'thickness,length,diameter-thickness ratio and other parameters on the crossover pressure and crossover form,the buckle arresting characteristic of integral buckle arrestor was revealed.Research results show that in parallel crossover stage,increasing the thickness and effective length of integral buckle arrestors will effectively improve the crossover pressure.While in flipping crossover stage,the growth rate of crossover pressure has slowed down.Based on the finite element data,the calculation formula of crossover pressure was obtained by fitting.Compared with the existing empirical formula,this formula is more accurate in the comparison with the experimental results,and it has a guiding significance for the design and construction of the integral buckle arrestors.

关 键 词：整体式止屈器 海底管道 垂直穿越 止屈特性 穿越压力 

分 类 号：P756.2[天文地球—海洋科学]