摘要
为了研究深海实尺寸顶张力立管的固有振动特性,建立了立管固有振动分析模型,并通过有限单元法编程求解,计算分析了立管顺流向及横流向振动固有频率及振型,同时分析了顶张力、海流流速及内流密度的变化对立管固有振动特性的影响规律。研究结果表明:立管顺流向振动固有频率高于横流向;立管顺流向与横流向振动固有振型不同,且均不是标准正弦曲线;顶张力的变化对立管振动固有频率及振型具有较大影响;海流流速的变化主要影响立管顺流向振动固有频率及振型;内流密度的变化主要影响立管振动固有频率及顺流向振动固有振型。研究结果可为深海顶张力立管复杂动态分析及精确设计提供参考。
To study the natural vibration of top tensioned riser in deep water,a natural vibration analysis model of riser with actual size is established and solved by the finite element method.The natural frequency and vibration mode of the riser under cross-flow and down-flow direction are calculated and analyzed.The influence of the top tension force,current velocity and internal fluid density on the natural vibration of the riser is analyzed.The results show that the natural frequency of the riser under down-flow is higher than that under cross-flow.The natural vibration modes of the riser under cross-flow and down-flow direction are different,and are not standard sinusoid.The top tension has a great influence on the natural frequency and vibration mode of the riser.The current velocity mainly affects the natural frequency and vibration mode of the riser under down-flow direction.The internal fluid density mainly influences the natural frequency of the riser and the natural vibration mode of the riser under down-flow direction.The research results can provide references for the complex dynamic analysis and design of deep water top tensioned riser.
作者
高光海
崔运静
仇性启
束奇
Gao Guanghai;Cui Yunjing;Qiu Xingqi;Shu Qi(College of Chemical Engineering,China University of Petroleum(Huadong);College of Mechanical and Electronic Engineering,China University of Petroleum(Huadong))
出处
《石油机械》
北大核心
2018年第11期35-41,共7页
China Petroleum Machinery
基金
国家863计划项目"天然气水合物钻探取芯工程样机及配套技术"(2013AA092602)
中央高校基本科研业务费专项资金资助项目"基于大挠度弯曲梁理论的海洋立管静动力学研究"(16CX06015A)
关键词
顶张力立管
振动频率
振型
顶部张紧力
海流流速
内流密度
top tensioned riser
vibration frequency
vibration mode
top tension
sea current velocity
internal fluid density
