基于有限元方法的柔性立管接头疲劳性能分析OA
Fatigue performance evaluation of flexible riser joints using finite element method
针对深水资源开发中柔性立管接头长期依赖进口、疲劳寿命评估体系不完善的问题,本文以1 200 m水深黏结性柔性立管-浮体平台系统为研究对象,提出了基于多体耦合动力学与疲劳损伤演化机制的接头设计与评估方法.首先通过OrcaFlex建立平台-管道耦合动力学模型,提取管端接口处的有效张力与弯矩时程载荷,然后采用有限元方法建立了复合式与扣压式 2种接头结构的参数化模型,并在ANSYS平台上实现了其应力响应与疲劳损伤的精确仿真,最后结合雨流计数法与S-N曲线理论,建立了多轴应力状态的疲劳寿命评估体系.结果表明:复合式接头较扣压式接头,前者最大应力水平降低 30%,且应力分布更加均匀,复合式接头具备更优的结构协同性与抗疲劳特性.
Addressing the challenges of long-term reliance on imported products and the underdeveloped fatigue life evaluation system for flexible riser connectors in deepwater resource development,this study investigates a bonded flexible riser-floating platform system at a water depth of 1 200 m.A design and evaluation methodology for connectors based on multibody coupled dynamics and fatigue damage evolution mechanism is proposed.First,a coupled dynamic model of the platform and pipeline was established using OrcaFlex to extract time-history data for effective tension and bending moment at the pipe-end interface.Then,parametric finite element models of two connector types-hybrid and crimped-were developed,and their stress responses and fatigue damage were accurately simulated on the ANSYS platform.Finally,a fatigue life evaluation system accounting for multiaxial stress states was established by integrating the rainflow counting method with S-N curve theory.The results demonstrate that,compared to the crimped connector,the hybrid connector exhibits a 30%lower maximum stress level and a more uniform stress distribution,indicating superior structural synergy and fatigue resistance.
魏忠宁;沈义俊;唐耿
海南大学 土木建筑工程学院,海南 海口 570228||热带海洋工程材料及评价全国重点实验室,海南 海口 570228海南大学 海洋科学与工程学院,海南 海口 570228||热带海洋工程材料及评价全国重点实验室,海南 海口 570228海南大学 土木建筑工程学院,海南 海口 570228
能源科技
柔性立管ANSYS接头疲劳寿命S-N曲线
flexible riserANSYSpipe jointfatigue lifeS-N curve
《海南大学学报（自然科学版中英文）》 2026 (1)
1-13,13
本文得到以下基金项目支持:国家自然科学基金项目(52231012)海南省重大科技计划项目(ZDKJ2021027). This article was supported by the following funding projects:National Natural Science Foundation of China(52231012)Hainan Major Science and Technology Program(ZDKJ2021027).
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