考虑轮胎时滞效应的起落架摆振分析

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中图分类号： V216.2+2 V214.1+3 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202309040

Abstract：Thetiredeformationtravelingwavecharacteristicsvaryatdiferentvibrationfrequenciesandspeeds，andareinfluenced bythecouplingoflandinggearstructuralvibation，resultingincontinuouschangesintirelateraldeformationmodes.Thetiremodelsforprevioustraditionallandinggearshimmyanalysisarequasistaticrestoringforcemodel，whichassumes thatthefunctioalre lationshipbetweentirelateralforce，self-aligning momentandlateraldeformationisfixed.Basedonthetirestretchedstringtheo ry，atimedelaytiremodelcoupledwithlandinggearshimmyisestablished toanalyzethedynamicchanges in tirelateraldeformationmodes，andthereal-timelateraldeformationdistributionofthetireandthenonlineardynamicbehaviorofthelandinggeardur ingshimmyareobtained.Thetimedelayisintroducedtocalculatethetiredeformationtraveling wave，ndthestablityofthelandinggeartirecoupled shimmymodelisstudiedbythe bisectionmethod.Thetesting methods fortheparametersoftimedelatire shimmymodelisprovided.Usingthemethods presentedin this paper，thelanding gearshimmyanalysis and experimentaltestofa certainaircraftareconducted.Thecalculatedvibrationfrequencyandshimmystabiltyregionareconsistentwiththeanalysisresults of traditional tire models and test results.

Keywords： shimmy; landing gear; tires； time delay； stability;damping

轮胎与地面接触区域内侧向复杂变形和载荷的传递受到摩擦定律控制的影响，部分为粘着区域，部分为滑移区域，轮胎动力学分析要在精度和计算代价之间取得平衡。（剩余13000字）