考虑大变形的大柔性立管涡激振动模型

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (18) : 21-25.

论文

考虑大变形的大柔性立管涡激振动模型

吴学敏，黄维平

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A new model for predicting vortex-induced vibrations of long flexible risers considering large deformation

WU Xue-min，HUANG Wei-ping

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文章历史 +

摘要

在总结深海大柔性立管涡激振动研究基础上，提出考虑大变形的大柔性立管涡激振动数学模型，开发出相应的计算程序。在验证新模型计算程序可靠的基础上，分别在雷诺数Re=6300、Re= 情况下研究深水顶张式立管涡激振动特征。结果表明，低雷诺数时立管涡激振动以低阶单模态振动为主；随雷诺数的增大，立管涡激振动出现多模态参与振动及涡激振动非完全对称大变形现象。考虑大变形的大柔性立管涡激振动数学模型可用于深水、极深水立管系统涡激振动响应分析预测。

Abstract

Based on the previous research work，an new model considering large deformation was proposed in this work to predict the responses of deep water riser induced by the vortex-induced vibration．The corresponding MATLAB codes are developed. Based on the new modal, the features of the top tension considering large deformation are further investigated at Re=6300 and Re= ．The results showed that: at low Reynolds numbers, low order single mode is the main vibration mode, but increased with Reynolds numbers, multiple modes are involved in the vibrations. Besides, large deformation happens. The new model considering large deformation could be used to predict vortex-induced vibrations of long flexible risers.

导出引用

吴学敏;黄维平. 考虑大变形的大柔性立管涡激振动模型[J]. 振动与冲击, 2013, 32(18): 21-25

WU Xue-min;HUANG Wei-ping. A new model for predicting vortex-induced vibrations of long flexible risers considering large deformation[J]. Journal of Vibration and Shock, 2013, 32(18): 21-25