摘要
海底管道的卷管铺设过程涉及多次正向和反向弯曲,并会产生较大的塑性变形。在铺设入水前,管道必须进行矫直处理,因此如何准确预测矫直过程中管道的力学响应以及如何对矫直器进行合理的设置具有重要意义。针对中国首艘卷管式铺管船“深达号”的矫直装置设计与典型工况,建立了一种基于悬臂梁的力学理论模型。该模型综合考虑了铺设过程中退卷和矫直的加载历程、管道材料的弹塑性特性以及校准器和上、下矫直器的相对位置关系。模型能实现对反弯半径及矫直器姿态等关键参数的计算。建立有限元分析模型,对理论模型进行验证并对管道矫直过程进行数值分析。结果表明理论模型可以准确预测管道矫直所需反弯半径、矫直器侧向行程以及倾角等参数。在管道矫直过程中,上矫直器处的作用载荷远大于下矫直器处。所提出的矫直理论模型可适用于不同尺寸管道的矫直分析,矫直后残余曲率满足DNV规范要求,预期可为“深达号”的实际矫直工艺设计提供指导。
The process of reeling submarine pipelines involves multiple forward and reverse bending,resulting in significant plastic deformation.Prior to immersion,pipelines must undergo straightening,making it crucial to accurately predict the mechanical response of the pipeline during the straightening process and to set up the straightening device reasonably.A mechanical theoretical model based on the cantilever beam is established for the design of the straightening device of China’s first reel-lay vessel,the Shenda vessel,and typical working conditions.This model comprehensively considers the loading history of unwinding and straightening during laying,the elastoplastic properties of pipeline materials,and the relative positions of the calibration device and upper and lower straighteners.The model can calculate key parameters such as the reverse bending radius and the attitude of the straightening device.A finite element analysis model is established to validate the theoretical model and conduct numerical analysis of the pipeline straightening process.The results indicate that the theoretical model can accurately predict parameters such as the required reverse bending radius,lateral travel of the straightener,and inclination during pipeline straightening.The load acting at the upper straightener during the pipeline straightening process is much greater than that at the lower straightener.The proposed straightening theoretical model is applicable to the straightening analysis of pipelines of different sizes,and the residual curvature after straightening meets the requirements of DNV standards,providing guidance for the actual straightening process design of the Shenda vessel.
作者
许卫平
徐爱进
王创祎
徐佳璐
袁林
XU Weiping;XU Aijin;WANG Chuangyi;XU Jialu;YUAN Lin(Shanghai Salvage Company,Ministry of Transport,Shanghai 200090,China;State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300350,China)
出处
《海洋工程》
CSCD
北大核心
2024年第3期145-155,共11页
The Ocean Engineering
基金
国家自然科学基金资助项目(52271288)。
关键词
卷管铺设
管道矫直
塑性变形
悬臂梁
海底管道
有限元仿真
reel-lay
pipeline straightening
plastic deformation
cantilever beam
submarine pipeline
finite element simulation
