一种预测宽高比为4：1的矩形截面结构涡激振动的双振子模型

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（1.金风科技股份有限公司，北京100176；2.重庆大学土木工程学院安全与防灾工程研究所，重庆 ）

关键词：涡激振动；双振子模型；流固耦合；流场；矩形断面 中图分类号： U441+.3 文献标志码：A DOI:10.16385/j.cnki.issn.1004-4523.202402035

Establishment on a novel dual-oscillator model tailored for vortex-induced vibration in a 4:1 rectangular cylinder

TANG Yuanyan1²,HUI Yi² (1.Goldwind Science & Technology Co.，Ltd.，Beijing 100176，China; 2.InstituteofaetyisasterretioEiegoofivilEeigoggUsityogg4o）

Abstract:Vortex-iducedvbration(V)isaubiquitousphenomeon，significantlyimpactingthesafety，functioality，andcofortf structures.ThemathematicalmodelofVViscrucialforquicklyprovidingkeyinformationonVVresponseandaessingthestrctural performance. In this study，a representative 4:1 rectangular section structure is selected as the research target，and a new dual-oscilator modelforpredictingthiscyer'ssposespropoedspiedbyturawakeosilltoroelingaproach.Itsoel swayingoscilltorsareposiioedontewindwardandlewardsidsofthecylinder，simulatingtheperodicsddngoftemaiandwake vortices in the 4:1 rectangular cylinder.The motions of these two oscillators follow the governing equations of the VanderPol system，in whichallparametersosstdistictmeagsdaneantifdtougheperietaloumeicalsimulatio.Comprativeaalyis confirms the high applicability of the proposed dual-oscillator model in VIV prediction for a 4:1 rectangular cylinder.With only changing structuraldamping，thismodelacuratelypredictstheVIVresponsecurveacrossawiderangeofScrutonnumbers.Furtherore，the proposedodelacuratelycapturestheinteractionbetweenthevortexsheddingadcylder'svibatio.AsVIVtrasitionsfrotheiniial branchtotheuperbranch，thpasediferencebetwenthetwoosilltorsicreases.Thiscangealigswiththephysicalphenomeonofan increasingpasediereeetwentesddgofteakevortendthmavortexFurtealysisofteuaosilltrodeleeals thatheosilloohwadimauV，loltooedsisuppesito VIV response.

Keywords:vortex-inducedvibration;dal-oscilatormodel;flow-solidinteraction;flowpatern;rectangularcylinder

当空气流经钝体结构时，会产生交替脱落的旋涡。（剩余19945字）