Research on Bifurcation Response for Vortex-Induced Vibration of Top Tension Riser in Shear Flow
Research on Bifurcation Response for Vortex-Induced Vibration of Top Tension Riser in Shear Flow
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剪切流中顶张力立管涡激振动的分叉响应研究
DOI：
10.1155/2019/1564194
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发表时间：
2019-11
影响因子：
--
通讯作者：
Zhang Xiangyun
中科院分区：
文献类型：
--
作者：
Yuancen Wang;Zhiqiang Wu;Zhang Xiangyun
顶张力隔水管是深海石油工程中最常用的设备之一。目前，对其涡激振动的研究方法主要集中在有限元分析和实验两方面。通过有限的数值或实验研究，而不是对其丰富的动力学进行非线性分析，对其各种非线性力学机理的了解是不够的。在Van der Pol尾迹振子模型的基础上，建立了切变流涡激振荡器的非线性动力学模型。该模型考虑了剪切流作用下TTR的流固耦合作用。研究了TTR的动态行为与流速变化的关系。通过五阶Galerkin离散化计算局部最大位移响应来模拟结构的动力行为。然后利用Poincare映射来量化每个单独流速下的TTR的动态特性，这有助于识别非线性系统的分叉路径。在此基础上，给出了分岔图不同区域典型流速下提升管涡流的时程、相图、FFT谱和包络图。结果表明，TTR的VIV响应描述了具有双稳特性的Hopf分叉现象。结合结构特征分析和三维谱等值线，更全面地了解了切变流动中TTR的主要动力学特征。这些认识为立管结构参数的设计和优化提供了新的思路和参考。
The top tension riser (TTR) is one of the most frequently used equipment in deep-sea petroleum engineering. At present, the research methods of its vortex-induced vibration (VIV) are mainly focused on finite element analysis and experiment. The understanding of its various nonlinear mechanical mechanisms would be inadequate via limited numerical or experimental studies rather than nonlinear analysis of its rich dynamics. Based on the Van der Pol wake oscillator model, the nonlinear dynamic model of the TTR subject to shear flow VIV is established. The proposed model includes the fluid-structure interaction of the TTR under shear flow. Dynamic behavior of the TTR in association with the variation of flow velocity is investigated. The dynamic behavior is simulated by computing the local maximum displacement response via the fifth-order Galerkin discretization. The Poincare map is then utilized to quantify the dynamic property of TTR under each individual flow velocity, which helps identifying the bifurcation path of the nonlinear system. The time history, phase diagram, FFT spectrum, and envelope diagram about the riser VIV at typical flow velocity in different regions of the bifurcation diagram are then given. It is found that the VIV response of the TTR depicts the Hopf bifurcation phenomena with bistable characteristics. Together with the structural eigen-analysis and the three-dimensional spectrum contour, the main dynamic features of the TTR in shear flow are more comprehensively understood. Such understandings may provide new ideas and references for the design and optimization of the riser structural parameters.
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影响因子：
5
作者：
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通讯作者：
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影响因子：
2.2
作者：
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影响因子：
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作者：
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影响因子：
3.6
作者：
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通讯作者：
H. Al-Jamal;C. Dalton
DOI：
10.1243/09544062jmes2273
发表时间：
2011-02
期刊：
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
影响因子：
--
作者：
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通讯作者：
M. Zamanian;S. E. Khadem