Response Characteristics and Suppression of Vortex-Induced Vibration of the Flexible Cable

振动 情态动词 扭转 涡激振动 涡流 模态分析 物理 声学 结构工程 工程类 机械 材料科学 几何学 复合材料 数学
作者
Yan Han,Xu Chen,Xuhui Zhou,Junfeng Yang,Peng Hu,Hubin Yan
出处
期刊:International Journal of Structural Stability and Dynamics [World Scientific]
卷期号:24 (21) 被引量:1
标识
DOI:10.1142/s0219455424502353
摘要

To investigate the vortex-induced vibration (VIV) of a flexible cable in the uniform flow, experiments were conducted using a flexible cable with an external diameter of 80[Formula: see text]mm and a length of 10.48[Formula: see text]m in the wind tunnel. The characteristics of multi-modal VIV, time-frequency and traveling wave behavior of the flexible cable were analyzed. Moreover, the effects of twist direction, diameter and the single/double helical wire on the VIV characteristics of the flexible cable were investigated. It is found that the flexible cable experiences single and multi-modal VIVs in uniform flow at different incoming wind speeds, respectively. For the multi-modal VIV of the flexible cable, the vibration over the time history is dominated by two adjacent modal frequencies and shows a phenomenon of beat vibration. The multi-modal VIV responses of the flexible cable show a mix of standing and traveling wave behaviors, in which the effects of standing wave are more pronounced near both ends and the effects of traveling wave are more dominant in the middle region of the flexible cable. The twist direction of the helical wire has little effect on the VIV responses of the flexible cable. The VIV amplitudes of the flexible cable can be reduced by a single helical wire. With the diameter of the helical wire increases, the suppression effects of the single or double helical wire on the VIV of the flexible cable can be improved. Particularly, the double helical wire with diameter 0.10D can effectively suppress the VIV of the flexible cable.
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