首页> 外文期刊>Computers & Structures >Computation of vortex-induced vibrations of long structures using a wake oscillator model: Comparison with DNS and experiments
【24h】

Computation of vortex-induced vibrations of long structures using a wake oscillator model: Comparison with DNS and experiments

机译:使用尾波振荡器模型计算长结构的涡激振动:与DNS和实验的比较

获取原文
获取原文并翻译 | 示例

摘要

We consider here the dynamics of flexible slender systems undergoing vortex-induced vibration (VIV). This type of motion results from the coupling between the oscillating wake due to cross-flow and the structure motion. Practical applications are mainly found in the field of ocean engineering, where long flexible structures such as risers or mooring cables are excited by sea currents. The wake dynamics is here represented using a distributed wake oscillator coupled to the dynamics of the slender structure, a cable or a tensioned beam. This results in two coupled partial differential equations with one variable for the solid displacement and one for the wake fluctuating lift. This simplified model of the wake dynamics has been previously validated on simple experiments. Here, comparisons with direct numerical simulation results are done for both uniform and non-uniform flow. Comparison is also performed between the wake oscillator predictions and some experimental results on long cables. The results of those comparisons show that the proposed method can be used as simple computational tool in the prediction of some aspects of vortex induced vibrations of long flexible structures.
机译:我们在这里考虑经受涡激振动(VIV)的柔性细长系统的动力学。这种运动是由于横流和结构运动引起的振荡尾流之间的耦合引起的。实际应用主要在海洋工程领域中发现,在该领域中,长形柔性结构(如立管或系泊电缆)会受到海流的激励。在此,使用与纤细结构,缆线或张紧梁的动力学耦合的分布式唤醒振荡器来表示唤醒动力学。这样就产生了两个耦合的偏微分方程,其中一个变量用于固体位移,一个变量用于尾波波动升力。之前已通过简单的实验验证了这种简化的尾流动力学模型。在此,对均匀和非均匀流动都进行了与直接数值模拟结果的比较。在长电缆上的尾波振荡器预测和一些实验结果之间也进行了比较。这些比较的结果表明,该方法可以作为简单的计算工具,用于预测长挠性结构的涡旋振动的某些方面。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号