顶张式立管液压气动式张紧器的数值模拟  被引量:3

Numerical modeling of the hydro-pneumatic tensioner for a top tensioned riser

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作  者:陈柏全[1,2] 余杨 余建星[1,2] 徐立新[1,2] 吴晨[1,2] 康煜媛[3] CHEN Baiquan;YU Yang;YU Jianxing;XU Lixin;WU Chen;KANG Yuyuan(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Collaborative Innovation Center for Advanced Ship and Deep-sea Exploration,Shanghai Jiao Tong University,Shanghai 200240,China;Tianjin Design Institute,China Petroleum Pipeline Engineering Co.,Ltd.,Tianjin 300457,China)

机构地区:[1]天津大学水利工程仿真与安全国家重点实验室,天津300350 [2]上海交通大学高新船舶与深海开发装备协同创新中心,上海200240 [3]中国石油管道局工程有限公司天津分公司,天津300457

出  处:《振动与冲击》2019年第10期85-91,共7页Journal of Vibration and Shock

基  金:国家自然科学基金(51609169;51779173);国家重点基础研究发展计划(973计划)(2014CB046804)

摘  要:综合考虑液压气柱的张力-冲程非线性关系以及平台-张紧器-立管之间的运动耦合关系,建立带液压气动式张紧器的顶张式立管有限元分析模型。为了更加符合工程实际,该模型中考虑了立管的真实截面布置以及采油树的作用。对4种张紧器模型,即恒定集中力模型、传统的简化模型、线性弹簧-阻尼模型以及非线性弹簧-阻尼模型进行对比分析。结果表明:恒定集中力模型不能反映立管张力的变化规律,而且立管响应也存在较大差别,故不宜采用;传统的简化模型过高评估了张紧器的张力水平,有可能导致不准确的立管响应评估结果;线性弹簧-阻尼模型可用于环境条件较温和的情况;该研究建立的非线性弹簧-阻尼模型最能反映张紧器的刚度特性,且在极端载荷环境下尤为适用。The finite element analysis model of a top tensioned riser with hydro-pneumatic tensioner was established,considering the nonlinear stiffness and the kinematic relationship in the platform-tensionerriser system.To establish a more applicable model,the actual riser string configuration and the effect of the Christmas tree were also considered.Subsequently,four kinds of tensioner models,i.e.a constant vertical tension model,a conventional simplified model,a linear spring-damper model and the proposed nonlinear spring-damper model,were comparatively studied.The results show that the constant vertical tension model is not recommended as it cannot reflect the actual tension in the tensioner and the response of the TTR.The conventional simplified model indeed overestimates the tension of tensioner and may lead to inaccurate estimation results of the TTR responses.The linear model is applicable when the environmental condition is relatively mild.It is strongly recommended to use the nonlinear model especially in harsher environmental conditions.

关 键 词:顶张式立管 液压气动张紧器 数值模拟 非线性 

分 类 号:P751[交通运输工程—港口、海岸及近海工程]

 

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