弯曲载荷下双金属机械复合管内衬层屈曲失效机理  

Buckling failure mechanism of bi-metallic mechanical clad pipe liner layers under bending load

作　　者：张杰[1,2,3] 胡特 ZHANG Jie;HU Te(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province,Chengdu 610500,China;Key Laboratory of Petroleum and Natural Gas Equipment,Ministry of Education,Chengdu 610500,China)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]石油天然气装备技术四川省科技资源共享服务平台,成都610500 [3]石油天然气装备教育部重点实验室,成都610500

出　　处：《船舶力学》2024年第2期283-293,共11页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(52104223)。

摘　　要：双金属机械复合管是油气田集输管线防腐控制的主要措施之一,而内衬层的失效是制约复合管工程应用的关键难题。为研究双金属机械复合管内衬层屈曲失效机理,建立弯曲载荷下复合管力学模型,研究成型压力、工作内压及复合管结构参数对内衬层失效模式的影响规律。结果表明:增加成型后的残余接触压力有助于提高内衬层的抗屈曲能力;较高的工作内压能够延缓内衬层屈曲时间,减小其褶皱幅值;成型前复合管层间初始间隙减小有利于提高内衬层抗屈曲能力;随着外基管壁厚、内衬管壁厚、复合管内径的增加,内衬管的抗屈曲能力增强。Bi-metallic mechanical clad pipes are one of the main measures for anti-corrosion control of oil and gas field gathering and transmission pipelines.The failure of their liner layers restricts the clad pipes'en⁃gineering application.In order to explore the buckling failure mechanism of liner layers of bi-metallic me⁃chanical clad pipes,the mechanical model of a clad pipe under bending load was established.The influence of forming pressure,working pressure and composite pipe structural parameters on the failure mode of the lin⁃er layer lining was studied.The results show that the buckling resistance of the liner layer is improved by in⁃creasing the residual contact pressure.The buckling time of the liner layer is delayed and the fold amplitude is reduced by increasing the working pressure.The reduction of the initial layers gap of the clad pipe before forming is beneficial to improve the buckling resistance of the liner layer.With the increase of the wall thick⁃ness of the outer base pipe,the wall thickness of the lining pipe and inner diameter of the clad pipe,the buck⁃ling resistance of the lining pipe increases.

关 键 词：双金属复合管 液压成型 弯曲载荷 屈曲失效 

分 类 号：TE8[石油与天然气工程—油气储运工程]