犁式挖沟机后挖沟埋管对海底管道屈曲压溃压力影响分析  

Influence of Post-trench Burying on Buckling Pressure of Subsea Pipeline

作　　者：刘可安 李修波 王华昆[3] 王鸿飞 LIU Kean;LI Xiubo;WANG Huakun;WANG Hongfei(Zhuzhou CRRC Times Electric Co.,Ltd.,Zhuzhou 412001,China;CRRC SMD(Shanghai)Ltd.,Shanghai 200240,China;State Kay Laboratory of Hydraulic Engineering Simulation and Safety School of Civil Engineering,Tianjin University Tianjin 300072,China)

机构地区：[1]株洲中车时代电气股份有限公司,株洲412001 [2]上海中车艾森迪海洋装备有限公司,上海200240 [3]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《中国造船》2020年第1期101-108,共8页Shipbuilding of China

基　　金：国家重点研发计划(2016YFC0304104)。

摘　　要：为了研究犁式挖沟机后挖沟埋管中各参数对悬跨段海底管道屈曲压溃压力的影响,采用Python语言对ABAQUS软件进行二次开发,以准静态的方式模拟悬跨段各参数对压溃压力的影响。分析结果显示,犁式挖沟机后挖沟埋管会导致悬跨段管道截面椭圆化。随着作业水深的不断增加,悬跨段托管架处管道局部由弹性变形进入塑性变形区,继而发生屈曲压溃现象。后挖沟深度和管道外径对临界压溃压力的影响较大,其他参数如距海床高度ΔH和等效重力g'的影响有限。建立了后挖沟埋管的海底管道屈曲压溃临界曲线,可为犁式挖沟机后挖沟埋管施工作业提供工程参考。In order to study buckling pressure of overhang spans of submarine pipelines with plough post-trench burying pipe,the software ABAQUS was re-developed using Python to establish numerical models for the pipeline under external static pressure in seawater.Static analysis shows that the post-trench burying will make the cross section of the pipeline elliptical.With continuous increase of the operation water depth,elastic deformation of the pipeline at the cantilever section will be changed to plastic one,that is buckling phenomenon occurs.Post-trench and the outer diameter of the pipeline have great influence on the critical buckling pressure,but the influence of other parameters such as the height of the seabed and equivalent gravity is limited.A critical relationship related to the buckling of the submarine pipeline is established,based on which the working area and the buckling area are divided to provide reference for the construction operation of the post-trench with plough trencher.

关 键 词：犁式挖沟机 后挖沟埋管 海底管道 屈曲压溃 PYTHON 

分 类 号：TE832[石油与天然气工程—油气储运工程]