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首页> 外文会议>Proceedings of SUT International Conference on Subsea Technology and Deepwater Engineering >VIV Prediction of a Long Tension-Dominated Riser using a Wake Oscillator Model
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VIV Prediction of a Long Tension-Dominated Riser using a Wake Oscillator Model

机译：使用唤醒振荡器模型的长张力支配立管的VIV预测

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摘要

The vortex-induced vibration (VIV)of flexible long structures with combined in-line and cross-flow motion has been studied using a wake oscillator in this paper.The mean top tension was evaluated analytically and verified with experimental results, good agreement was observed to present its validity.Then the nonlinear coupled dynamics of the in-line and cross-flow VIV of a long tension-dominated riser were analyzed with the consideration of variation of mean top tension.The in-line and cross-flow resonant frequencies,lift and drag coefficients, dominant mode numbers, amplitudes and instantaneous deflections are reported and compared with experimental results, excellent agreements are observed.The comparison of mode numbers between the calculation with and without consideration of variation of mean top tension showed that the proposed analytical solution of mean top tension can produce a better prediction of multi-mode VIV.
机译：本文利用尾流振荡器研究了直线运动和横流运动相结合的柔性长结构的涡激振动（VIV），通过分析评估了平均顶部张力并与实验结果进行了验证，观察到了很好的一致性然后，在考虑平均顶部张力变化的情况下，分析了一个以张力为主导的长立管的在线和交叉流VIV的非线性耦合动力学。在线和交叉流共振频率，报告了升力和阻力系数，主要模态数，振幅和瞬时挠度，并与实验结果进行了比较，观察到了很好的一致性。在不考虑平均顶部张力变化的情况下，计算之间的模态数比较表明，所提出的解析解平均最高张力可以更好地预测多模VIV。

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