{"title":"Vortex-induced vibrations of an elastically supported rigid cylinder in a dual-mass system","authors":"Yang Qu , Wenjie Xu , Shixiao Fu , Yue Song","doi":"10.1016/j.jsv.2025.118940","DOIUrl":null,"url":null,"abstract":"<div><div>This paper investigates experimentally the vortex-induced vibration (VIV) of a dual-mass system characterized by two natural frequencies. Five different frequency ratios (<span><math><mi>R</mi></math></span> = 1.38, 1.59, 1.66, 1.77, and 1.94) were studied across a range of Reynolds numbers <span><math><mrow><mn>4500</mn><mo><</mo><mi>R</mi><mi>e</mi><mo><</mo><mn>20000</mn></mrow></math></span>. The study reveals that, in addition to the two lock-in regions at the first and second natural frequencies at low and high reduced velocities, there exists a transition range in between where the VIV response contains significant components at both frequencies. This transition region is bounded by an onset at a reduced velocity (defined by the first natural frequency) around 6 and concludes at a reduced velocity (defined by the second natural frequency) just below 6. The notable characteristics of the cylinder responses and fluid forces observed in the transition region are analyzed, and possible explanations for certain phenomenon are discussed.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"602 ","pages":"Article 118940"},"PeriodicalIF":4.9000,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sound and Vibration","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022460X25000148","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/8 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ACOUSTICS","Score":null,"Total":0}
引用次数: 0
Abstract
This paper investigates experimentally the vortex-induced vibration (VIV) of a dual-mass system characterized by two natural frequencies. Five different frequency ratios ( = 1.38, 1.59, 1.66, 1.77, and 1.94) were studied across a range of Reynolds numbers . The study reveals that, in addition to the two lock-in regions at the first and second natural frequencies at low and high reduced velocities, there exists a transition range in between where the VIV response contains significant components at both frequencies. This transition region is bounded by an onset at a reduced velocity (defined by the first natural frequency) around 6 and concludes at a reduced velocity (defined by the second natural frequency) just below 6. The notable characteristics of the cylinder responses and fluid forces observed in the transition region are analyzed, and possible explanations for certain phenomenon are discussed.
期刊介绍：
The Journal of Sound and Vibration (JSV) is an independent journal devoted to the prompt publication of original papers, both theoretical and experimental, that provide new information on any aspect of sound or vibration. There is an emphasis on fundamental work that has potential for practical application.
JSV was founded and operates on the premise that the subject of sound and vibration requires a journal that publishes papers of a high technical standard across the various subdisciplines, thus facilitating awareness of techniques and discoveries in one area that may be applicable in others.
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