Using strip theory to model vibrations in offshore risers
Using strip theory to model vibrations in offshore risers
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DOI：
10.1680/jencm.15.00022
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发表时间：
2016-08
期刊：
影响因子：
--
通讯作者：
S. H. Madani;J. Wissink;H. Bahai
中科院分区：
文献类型：
--
作者：
S. H. Madani;J. Wissink;H. Bahai
本文提出了一种用条形理论求解流动方程和结构方程的耦合时域解的算法。采用该方法对海上能源工业中柔性长隔水管涡激振动的多模态响应进行了数值模拟。对目前用于解决海洋隔水管涡激振动问题的各种模型进行了简要的研究和比较。本文报告的工作最初包括计算隔水管的特征值和特征模态，其结果随后用于基于模态分析的隔水管响应预测。用实验和数值结果验证了二维流场模拟理论的正确性。研究了不同顶张力下隔水管沿横流方向运动幅度的均方根，并与文献中报道的类似情况进行了比较。
This paper presents an algorithm for the coupled time-domain solution of flow and structure equations using strip theory. The approach is then adopted for numerical simulation of the multi-mode response of flexible long risers used in the offshore energy industry for vortex-induced vibrations. The various models currently used to solve the problem of vortex-induced vibrations in marine risers are briefly studied and compared. The work reported here initially includes calculation of eigenvalues and eigenmodes of risers, the results of which are subsequently used to predict the response of risers based on a modal analysis. The two-dimensional flow simulations used in the strip theory are validated using experimental and numerical results presented in the literature. The root mean square of the amplitude of the riser movement in the cross-flow direction for various top tensions are studied and compared with similar cases reported in the literature.