轴向载荷下含双缺陷高强钢厚壁管道压溃压力计算方法  

A Method for Calculating Collapse Pressure of High-Strength-Steel Thick-Wall Pipelines with Double Defects under Axial Load

作　　者：樊建春[1,4] 蒋智明 陈严飞 王瑞[2] 刘丹丹 盛玉 FAN Jianchun;JIANG Zhiming;CHEN Yanfei;WANG Rui;LIU Dandan;SHENG Yu(College of Safety and Ocean Engineering,China University of Petroleum(Beijing),Changping 102249,Beijing,China;Research Institute of Engineering Technology,PetroChina Xinjiang Oilfield Company,Karamay 834000,Xinjiang,China;National Engineering Laboratory for Pipeline Safety/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology,China University of Petroleum(Beijing),Changping 102249,Beijing,China;Key Laboratory of Oil and Gas Safety and Emergency Technology,Ministry of Emergency Management,Changping 102249,Beijing,China)

机构地区：[1]中国石油大学(北京)安全与海洋工程学院,北京昌平102249 [2]中国石油新疆油田分公司工程技术研究院,新疆克拉玛依834000 [3]中国石油大学(北京)油气管道输送安全国家工程实验室/城市油气输配技术北京市重点实验室,北京昌平102249 [4]应急管理部油气生产安全与应急技术重点实验室,北京昌平102249

出　　处：《新疆石油天然气》2024年第2期71-78,共8页Xinjiang Oil & Gas

基　　金：国家自然科学基金项目“组合荷载作用复杂腐蚀-凹痕缺陷深海管道局部屈曲失效机理和安全评价”(51779265);“位移控制下耦合缺陷深海双层管道局部屈曲失效机理和应变评价研究”(52171285)。

摘　　要：海底油气管道在生产和铺设时,由于受直缝焊管(UOE)制管工艺和张紧器的影响,会造成管道椭圆度缺陷,同时复杂的深海服役条件易造成海底管道局部发生金属腐蚀缺陷。针对含有双缺陷的高强钢厚壁管道在外压和轴向力同时作用下的复杂载荷屈曲压溃问题,考虑管道的几何非线性和材料非线性建立ABAQUS有限元模型。对不同管道材料、几何参数和缺陷几何参数的2400多组有限元计算数据进行分析,总结得到含双缺陷高强钢厚壁管道在轴向力载荷作用下的压溃压力变化规律,并提出轴向载荷作用下含双缺陷高强钢厚壁管道的压溃压力计算方法。本方法可为实际工程中高强钢厚壁管道屈曲载荷的确定提供理论依据,从而保障海洋油气输送的安全。During the production and laying of submarine oil and gas pipelines,the ovality defects of pipelines may occur,due to the influences of the UOE pipe making process and tensioner.Meanwhile,complex deep-sea service conditions tend to cause local corrosion defects in submarine pipelines.An ABAQUS finite element model is established to address the buckling and collapse of thick-wall high-strength-steel pipe with double defects under complex loading of coexisting external pressure and axial force,considering the geometric and material nonlinearity of the pipe.Based on the analysis of more than 2400 sets of finite element simulation data incorporating different pipe materials,geometric parameters and defect geometric parameters,the variation law of collapse pressure of high-strength-steel thick-wall pipes with double defects is summarized,and the calculation method of collapse pressure of high-strength-steel thick-wall pipes with double defects is proposed.This method provides a theoretical basis for predicting the buckling load of high-strengthsteel thick-wall pipeline in practical engineering projects,so as to ensure the safety of offshore oil and gas transportation.

关 键 词：轴向力 外压 压溃 缺陷 椭圆度 

分 类 号：TE88[石油与天然气工程—油气储运工程]