Numerical Simulations of Cylinder VIV Focusing on High Harmonics
Numerical Simulations of Cylinder VIV Focusing on High Harmonics
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DOI：
10.1115/omae2009-80002
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Y. Constantinides;O. H. Oakley
中科院分区：
文献类型：
--
作者：
Y. Constantinides;O. H. Oakley
在DeepStar实验期间发现的柔性圆柱体涡激振动中的高频贡献揭示了一个重大遗漏，并由于高疲劳贡献引起了立管设计者的担忧。研究人员目前正通过分析稀疏的实验数据或进行简化的实验来关注这一领域。在过去成功的CFD模拟的基础上，这项数值研究的重点是了解三次谐波的起源和原因。一系列基本的弹簧支撑的刚性圆柱体和各种配置的柔性圆柱体的计算进行验证计算流体动力学，并获得定性的理解。建立了引起三次谐波的流体动力与圆柱体运动及其空间特性之间的关系。Copyright © 2009 by ASME
The discovery of high frequency contributions in flexible cylinder VIV during the DeepStar experiments revealed a significant omission and raised concerns among riser designers due to the high fatigue contribution. Researchers are now focusing on this area by analyzing the sparse experimental data or performing simplified experiments. Building on past success with CFD simulations, this numerical study focuses on understanding the origin and cause of the 3rd harmonic in particular. An array of basic spring supported rigid cylinder and various configurations of flexible cylinder computations are performed to validate CFD and to gain a qualitative understanding. A relationship between the hydrodynamic force causing the 3rd harmonic and cylinder motion as well its spatial characteristics is established.Copyright © 2009 by ASME