海洋环境中LNG多工况转运用低温软管动力学响应研究  

Dynamic response of cryogenic hoses for multi-condition LNG transfer in marine environments

作　　者：刘云 苏琦 张尤优 周伟 孙紫麾 杨建业 阎军[2,5] LIU Yun;SU Qi;ZHANG You-you;ZHOU Wei;SUN Zi-hui;YANG Jian-ye;YAN Jun(CNOOC Research Institute,Beijing 100028,China;State Key Laboratory of Structural Analysis for Industrial Equipment,Department of Engineering Mechanics,Dalian University of Technology,Dalian 116024,China;Research and Development Center,CNOOC Gas&Power Group Co.,Ltd.,Beijing 100028,China;Offshore Oil Engineering Co.,Ltd.,Tianjin 300461,China;Ningbo Research Institute of Dalian University of Technology,Ningbo 315016,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]大连理工大学工业装备结构分析国家重点实验室工程力学系,辽宁大连116024 [3]中海石油气电集团技术研发中心,北京100028 [4]海洋石油工程股份有限公司,天津300461 [5]大连理工大学宁波研究院,浙江宁波315016

出　　处：《船舶力学》2024年第6期843-855,共13页Journal of Ship Mechanics

基　　金：大连市支持高层次人才创新创业项目(2021RD16)。

摘　　要：LNG低温软管是液化天然气深远海转运装卸的关键纽带,保证其安全可靠运行、高效持续作业对于LNG输送系统至关重要。LNG低温软管的主要应用工况有船-船并靠卸料、船-船串靠卸料及船岸加注。针对这些不同的应用工况,本文开展针对LNG低温软管的整体水动力分析和整体布置参数的敏感性分析。以直径为12英寸规格的LNG低温软管为研究对象,考虑风、浪、流等复杂海洋环境荷载的联合作用,采用Orcaflex软件对不同应用工况下的LNG低温软管进行建模、水动力分析和计算校核,研究结构的关键响应,并对低温软管整体线型设计参数及提升速度进行敏感性分析。结果表明:无论是串靠还是并靠工况,管长和两船间距增大都会导致曲率极值增大,张力极值减小;船岸加注时,提升速度会使张力极值减小,曲率极值增大。研究成果可为LNG低温软管的设计优化提供理论依据,并对FLNG卸料系统整体布置具有参考意义。LNG cryogenic hoses are used for connecting floating structures to transport LNG efficiently and continuously in the process of LNG deep-sea transportation and unloading.Making sure that cryogenic flexible hoses operate safely and reliably is crucial for the LNG mining system.The main application conditions of LNG cryogenic hoses are ship-ship side-by-side(SBS)unloading,ship-ship tandem unloading,and ship-shore refueling.The hydrodynamic analysis and calculation of LNG cryogenic hoses were carried out according to these application conditions,and sensitivity analysis of the global layout parameters of the hoses was performed.The LNG cryogenic hose with a diameter of 12 inches was used as the object of study.Considering the combined effects of wind,wave and current marine environmental loads,the LNG cryogenic hose was modeled and subjected to finite element calculations,hydrodynamic analysis and computational checks under different application conditions based on Orcaflex software.The critical response was studied,and sensitivity analysis was performed on the global configuration design parameters of the cryogenic hose and the lifting speed.The results show that increasing the hose length and the distance between the connection points leads to an increase in the curvature extreme value and a decrease in the tension extreme value for both tandem and SBS unloading conditions.The lifting speed decreases the tension extreme value and increases the curvature extreme value during ship-shore refueling condition.The study can provide a theoretical basis for the design optimization of LNG cryogenic hoses and has reference significance for the configuration arrangement of FLNG unloading systems.

关 键 词：LNG低温复合软管 LNG卸料系统 水动力 参数敏感性 

分 类 号：TV131.2[水利工程—水力学及河流动力学]