Lift(数据挖掘)
内部流动
偏微分方程
阻力
流量(数学)
数学
非线性系统
机械
振动
常微分方程
控制理论(社会学)
颂歌
钻井隔水管
振幅
数学分析
微分方程
物理
工程类
计算机科学
声学
控制(管理)
人工智能
数据挖掘
机械工程
量子力学
钻探
作者
Zhenhua Song,Yijun Shen,Menglan Duan,Jijun Gu
出处
期刊:IOP conference series
[IOP Publishing]
日期:2021-07-01
卷期号:809 (1): 012005-012005
标识
DOI:10.1088/1755-1315/809/1/012005
摘要
This paper aimed to analyze the dynamic response of a pinned-pinned riser subject to external and internal flow using the generalized integral technique (GITT). A nonlinear wake oscillator model is used to simulate the drag and lift force on the riser, and coupling with the vibration equation to form the second-order partial Differential Equations (PDEs). The PDEs system can be transformed into Ordinary Differential Equations (ODEs) employing the GITT approach. The influence of the internal flow and external flow are evaluated to show that both these two variables should not be negligible in numerical simulation of the dynamic response of a long flexible riser. The vibration amplitude, frequency and mode number are affected by the flow velocities, and mode transformation can be found in the variation of the internal and external flow velocities.
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