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1、第48卷第3期2016年6月南京航JournalofNanjingDOI：10．16356／j．1005—2615．2016．03．016空航天大學學報UniversityofAeronautics&Astronautics一種彈性支撐柔性轉(zhuǎn)子模態(tài)動平衡方法陳曦廖明夫劉展翅李巖(西北工業(yè)大學動力與能源學院，西安，710129)V01．48No．3Jun．2016摘要：針對目前模態(tài)平衡法難以高效平衡支承在彈性支承上的柔性轉(zhuǎn)子，提出一種考慮彈性支承影響的柔性轉(zhuǎn)子模態(tài)動平衡方法，建立轉(zhuǎn)子的有限元模型，搭建轉(zhuǎn)子試驗平臺
2、，計算并實測臨界轉(zhuǎn)速與振型，進而借助動平衡測試系統(tǒng)進行模態(tài)動平衡。結(jié)果表明：臨界轉(zhuǎn)速計算與實測的相對誤差僅為0．36％，一階計算振型與實測振型的模態(tài)置信度為0．9906?？紤]彈性支撐的柔性轉(zhuǎn)子模態(tài)動平衡方法合理，算法正確，在保證全正交平衡的前提下能夠減少試重的個數(shù)。左彈支與右剛支的計算支承剛度組合符合轉(zhuǎn)子結(jié)構(gòu)的實際情況，減振百分比CHl～CH3高達80％以上，CH4可達38％，總體減振效果明顯，具有一定的工程應用前景，可為航空發(fā)動機柔性轉(zhuǎn)子動平衡試驗提供技術(shù)參考。關(guān)鍵詞：彈性支承；模態(tài)動平衡；振型；有限元；柔性
3、轉(zhuǎn)子中圖分類號：V231．1文獻標志碼：A文章編號：1005—2615(2016)03—0402—08ModalBalancingMethodforFlexibleRotorswithElasticSupportsChenXi，LiaoMingfu，LiuZhanchi，LiYan(SchoolofPowerandEnergy，NorthwesternPolytechnicalUniversity，Xi’all，710129，China)Abstract：Anewmethodofmodalbalancingfo
4、rflexiblerotorsconsideringtheimpactofelasticsupportsisproposedsinceflexiblerotorssupportedonelasticsupportscannotbeefficientlybalancedusingthecurrentmodalbalancingmethod．AfiniteelementmodelofarotoriSestablishedandarotortestrigiSbuiltup．Aftercalculatingandmea
5、suringcriticalspeedsandvibrationmodes，modalbalancingisconductedthroughtherotortestingsystem．Resultssuggestthattherelativeerrorbetweenthecalculatedandmeasurederiticalspeedsisonly0．36％andthemodalassurancecriterionofthefirstcalculatedandmeasuredmodeshapesis0．99
6、06．Themethodofmodalbalancingforflexiblerotorscon—sideringelasticsupportsisreasonable，thealgorithmsarecorrectandthenumberoftrialmasscanbereducedunderthepremiseofensuringfullyorthogonalbalance．Acombinationofcalculatedsupportstiffness，i．e．，anelasticsupportatlef
7、tendandarigidsupportatrightend，isaccordantwiththeactualsituationofrotorstructureandthevibrationreductionpercentagesfromCHltoCH3reachmorethan80％andCH4upto38％．Astheoveralldampingeffectisobvious，themodalbalancingmethodconsideringelasticsupportshasaprospectineng
8、ineeringapplicationanditcanprovidetechnicalreferenceforbalancetestsofflexiblerotorsinaeroengines．Keywords：elasticsupport；modalbalancing；modeshape；finiteelement；flexiblerotor收稿El期：2015—07—23；修訂日期
