Modeling of fluid–structure interaction for simulating vortex-induced vibration of flexible riser: finite difference method combined with wake oscillator model
Modeling of fluid–structure interaction for simulating vortex-induced vibration of flexible riser: finite difference method combined with wake oscillator model
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DOI：
10.1007/s00773-014-0284-z
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发表时间：
2014-09
影响因子：
2.6
通讯作者：
Viet-Phan Doan;Y. Nishi
中科院分区：
文献类型：
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作者：
Viet-Phan Doan;Y. Nishi
提出了一种柔性立管涡激振动动态运动的数值模拟方法。该方法基于用于求解管道非线性结构动力学的有限差分格式和用于量化作用在管道上的涡激作用力的尾迹振子模型，两者的结合可以提供非常高效和稳定的计算。为了验证该方法的准确性，我们对均匀流和剪切流条件下的立管涡激振动进行了数值模拟，并与前人的实验结果进行了比较。因此，我们证实本方法可以模拟管道涡激振动的两个重要方面：横流位移的频率、振型和位移幅值。
This paper proposes a numerical simulation method for the dynamic motion of a flexible riser pipe undergoing vortex-induced vibration (VIV). The method is based on a finite difference scheme for solving nonlinear structural dynamics of the pipe and wake oscillator model for quantifying vortex-induced forces acting on the pipe, the combination of which can offer a very efficient and stable computation. To investigate the accuracy of the method, we performed simulations of the VIV of riser pipes under uniform flow and sheared flow conditions; and then compared obtained results with experiments of preceding works. We consequently confirmed that the present method can simulate a couple of important aspects of the VIV of the pipes: frequency, mode shape, and amplitude of displacement of cross-flow displacement.