弹性梁上圆柱旋转涡激振动的实验研究

IF 3.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Journal of Fluids and Structures Pub Date : 2025-01-20 DOI:10.1016/j.jfluidstructs.2025.104266

Yaroslav Demchenko , Oleg Ivanov , Vasily Vedeneev

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引用次数: 0

摘要

研究了在风洞中与亚音速气流方向相反的弹性悬臂梁上安装的刚性有限跨圆柱体。目的是识别和分析用于基于涡激振动的能量采集器的各种类型的涡激共振激励。实验研究结果表明，与具有类似模型配置的类似工作相反，执行二维平移振荡，我们发现了一种以前未被探索的三维型VIV，其中圆柱体围绕悬臂支撑旋转。实验证明，这种类型的振荡存在锁定状态，并且由圆柱体的上部和下部产生的von Kármán涡街以π相位移。我们对这种新型的VIV进行了详细的分析。

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Experimental investigation of rotational vortex-induced vibrations of a circular cylinder attached to an elastic beam

We study a rigid finite-span cylinder mounted on an elastic cantilever beam transversely to the direction of subsonic airflow in a wind tunnel. The purpose is to identify and analyze various types of vortex-induced resonant excitation for use in energy harvesters based on vortex-induced vibrations. The results of the experimental study show that in contrast to similar works with a similar model configuration that performs two-dimensional translational oscillations, we have discovered a previously unexplored three-dimensional type of VIV in which the cylinder rotates around the cantilever support. It has been experimentally proven that a lock-in regime exists for this type of oscillation, and the von Kármán vortex streets, generated by upper and lower parts of the cylinder, are shifted in phase by

π

. We conduct a detailed analysis of this new type of VIV.

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来源期刊

Journal of Fluids and Structures 工程技术-工程：机械

CiteScore

6.90

自引率

8.30%

发文量

173

审稿时长

65 days

期刊介绍： The Journal of Fluids and Structures serves as a focal point and a forum for the exchange of ideas, for the many kinds of specialists and practitioners concerned with fluid–structure interactions and the dynamics of systems related thereto, in any field. One of its aims is to foster the cross–fertilization of ideas, methods and techniques in the various disciplines involved. The journal publishes papers that present original and significant contributions on all aspects of the mechanical interactions between fluids and solids, regardless of scale.