海底管道后挖沟过程的应力解析分析方法  

Analytical Stress Analysis Method for Submarine Pipeline during Trenching

作　　者：夏梦莹[1] 张宏[1] 吴锴[1] 吴经天 

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249 [2]中石化天津液化天然气有限责任公司,天津300457

出　　处：《石油管材与仪器》2017年第6期41-43,共3页Petroleum Tubular Goods & Instruments

摘　　要：海底管道在后挖沟过程中会产生较大的变形,此时管道内产生较大的应力,对管道安全的运行形成威胁。因此准确给出挖沟过程中管道应力计算方法具有重要意义。基于弹性梁理论,给出了挖沟过程中管道挠曲线微分方程,通过边界条件与协调方程,给出了考虑几何非线性的挖沟过程中管道应力与变形解析计算方法。通过与有限元数值模型对比得到本解析方法结果与数值方法结果基本一致,可以用于工程中海底管道的应力计算。During the after trenching process, large deformation will occur in the pipe, which can induce large stress leading to the potentialfailure. Thus an accurate stress estimation method for pipelines under this load condition was necessary. Based on elastic beam theory, thepipe deflection equations were proposed. The analytical stress and deformation results were derived by the boundary conditions and the coordinationcondition between the geometrical elongation and the physical one. Finally, this proposed method was validated accuracy for calculatingpipe stress by comparing with a finite element model.

关 键 词：海底管道 挖沟敷设 应力 解析方法 数值验证 

分 类 号：TE973[石油与天然气工程—石油机械设备]