考虑应变强化效应海底管道极限承载力研究  

Ultimate bending capacity of offshore pipeline considering strain hardening effect

作　　者：陈严飞[1] 张娟 张宏[1] 蔡峰峰 

机构地区：[1]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,北京102249 [2]中国电建集团北京勘测设计研究院,北京100024 [3]石油工程设计有限责任公司北京分公司,北京100085

出　　处：《船舶力学》2015年第4期420-427,共8页Journal of Ship Mechanics

基　　金：国家自然科学基金(51309236);教育部博士点基金(20120007120009);上海交通大学海洋工程国家重点实验室开放基金(1314);天津大学水利工程仿真与安全国家重点实验室开放基金(HESS-1411)

摘　　要：文章基于线性强化材料模型,推导了轴向拉力作用下海底管道极限弯矩承载力解析解,给出了海底管道在轴向拉力与弯矩载荷同时作用下的极限承载力的近似解,编制了海底管道极限承载力计算程序BCP。通过与实验结果的比对,验证了解析方法的正确性。结论表明考虑应变强化效应的海底管道极限承载力结算结果更为合理,该文可为海底管道的结构强度设计和安全性评价提供一定的参考依据。Based on Hencky＇s total strain theory of plasticity, ultimate bending capacity of offshore pipeline can be determined analytically assuming linear strain hardening material. The methods proposed in this paper are able to account for the combined action of internal pressure and axial tensile force. Good accuracy is observed when ultimate bending capacities obtained from analytical solutions are compared with experimental results from full-size tests of steel pipes. The results show that the elastic-perfectly plastic material used comely yield lower than the strain hardening material pipes, and may underestimate the ultimate bending capacity of the pipes. The solutions proposed in this paper are applicable in the structural design and safety evaluation of offshore pipelines.

关 键 词：海底管道 极限弯矩承载力 应变强化 

分 类 号：TE973[石油与天然气工程—石油机械设备]