簡介：THEAEROENGINEROTORSYSTEM’SVIBRATIONFAULTDIAGNOSISBASEDONTHEDOUBLEGRIDCORRECTEDWAVECLUSTERALGORITHMADISSERTATIONSUBMITTEDFORTHEDEGREEOFMASTERONMECHANICALENGINEERINGBYZHANGMINGMINGUNDERTHESUPERVISIONOFPROFLIUXIAOBOCOLLEGEOFAERONAUTICALMANUFACTURINGENGINEERINGNANCHANGHANGKONGUNIVERSITY,NANCHANG,CHINAJUNE,2016IIABSTRACTTHEROTORSYSTEMISTHECOREPARTOFTHETYPICALROTATINGMACHINERYAEROENGINE,WHETHERITISNORMALORNOTHASAFFECTIONONTHEOPERATINGSTATEOFTHEWHOLEMACHINEINORDERTOIMPROVETHEPRODUCTIONEFFICIENCYANDAVOIDTHESERIOUSACCIDENTS,ITISOFGREATSIGNIFICANCETOCARRYONTHEFAULTDIAGNOSISANDMONITORINGOFTHEROTORWITHTHEDEVELOPMENTOFINFORMATIONTECHNOLOGY,INTELLECTUALIZATIONHASBECOMETHEDEVELOPINGDIRECTIONOFTHEFAULTDIAGNOSISANDWITHTHEDRAMATICINCREASEOFFAULTINFORMATIONDATAANDTHEEXISTENCEOFKNOWLEDGEBOTTLENECK,THETRADITIONALPATTERNRECOGNITIONMETHODISDIFFICULTTOMEETTHEREQUIREMENTSOFMODERNFAULTDIAGNOSISDEVELOPINGNEWMETHODTOREALIZETHEPATTERNRECOGNITIONANDCLUSTERINGDIAGNOSISOFROTORFAULTSQUICKLYANDINTELLIGENTLYISSTILLARESEARCHHOTSPOTTHEESSENCEOFFAULTDIAGNOSISISTHEAUTOMATICPROCESSINGANDJUDGINGOFTHEDATAWHICHCONTAINSTHERELEVANTFAULTINFORMATIONINTHISPAPER,THEAPPLICATIONOFWAVECLUSTERMETHODINFAULTDIAGNOSISOFAEROENGINEROTORSYSTEMWASEXPLOREDINCONSIDERATIONOFTHEHIGHSPACECOMPLEXITYOFTHEWAVECLUSTERALGORITHMINTHEHIGHDIMENSION,THEIMPROVEDWAVECLUSTERALGORITHMSTOREDBYTHECELLARRAYISPROPOSEDTHENONEMPTYELEMENTWITHVALIDDATAWASSTOREDINTHECELLARRAYSTRUCTURE,WHICHCANAVOIDTHEINVALIDOPERATIONOFTHEGRIDCELLSMEANWHILE,THEDATACONTENTANDADDRESSWERESETUPONTHESAMELOOKUPTABLETOCONSTRUCTTHEMAPPINGRELATIONSHIPWITHTHECHARACTERISTICTHATTHEARRAYSTRUCTURECANBEUSEDTOMANIPULATETHEDATAOFANYTYPEANDANYSIZE,WHICHREDUCETHESPACECOMPLEXITYOFTHEALGORITHMTHEROTORFAULTDIAGNOSISBASEDONTHEWAVECLUSTERALGORITHMISCARRIEDOUTWITHTHEDATAGOTBYTHEAEROENGINEROTORFAULTSIMULATINGEXPERIMENT,THERESULTSSHOWTHATTHESPACECOMPLEXITYOFTHEALGORITHMCANBEREDUCEDANDTHEEFFICIENCYOFTHEALGORITHMCANBEIMPROVEDWITHTHECELLULARSTORAGEITCANEFFECTIVELYTODISTINGUISHTHEROTORFAULTSTATEBYUSETHEWAVECLUSTERSTOREDBYTHECELLARRAYINCONSIDEROFTHELOWPRECISIONANDEFFICIENCYOFTHECLUSTERINGWITHTHECONNECTIONDEFINEUSINGINTHETRADITIONWAVECLUSTERALGORITHM,ANIMPROVEDWAVECLUSTERALGORITHMBASEDONBREADTHFIRSTSEARCHALGORITHMWASPRESENTEDTHEALGORITHMINTEGRATEWITHTHEADVANTAGESOFTHEWAVECLUSTERALGORITHMANDTHEBREADTHFIRSTSEARCHBFSNEIGHBORCLUSTERINGALGORITHM,ANDTHEDEFINITIONOFTHEMESHNEIGHBORUNITOFTHEFORMERISUSEDTOIMPROVETHELATTERSENSITIVITYTHATREQUIRE

簡介：南京航空航天大學碩士學位論文航空發(fā)動機轉(zhuǎn)子連接螺栓預緊力與疲勞壽命研究姓名劉存申請學位級別碩士專業(yè)航空宇航推進理論與工程指導教師宋迎東20090301航空發(fā)動機轉(zhuǎn)子連接螺栓預緊力與疲勞壽命研究－II－ABSTRACTTHECONNECTINGBOLTSWHICHBEHAVEMANYADVANTAGESSUCHASGOODCONNECTINGSTIFFNESS，LIGHTWEIGHT，SIMPLESTRUCTUREEASYASSEMBLE，AREWIDELYUSEDINAREOENGINESFEWRESEARCHESONTHEDESIGNMETHODOFTHESECONNECTINGBOLTSHAVEBEENCARRIEDOUTINCHINAITISNECESSARYTODEVELOPETHEANALYSISMETHODSDESIGNCRITERIASOFCONNECTINGBOLTSUSEDINAEROENGINESTHISTHESISAIMSATTHECRITERIASOFAXIALPRELOADTHESTRENGTHANALYSISFATIGUELIFEPREDICTIONOFCONNECTINGBOLTSTHEACTERISTICSMAGNITUDEOFTHEAERODYNAMICLOADSCENTRIFUGALLOADSTHERMALLOADSMANEUVERLOADSTQUESUPONTHELOWPOWERTURBINEROTSAREANALYZEDCALCULATEDA3DCYCLESYMMETRYFINITEELMENTMODELOFTHELOWPRESSURETURBINEROTWITHCONNECTINGBOLTSISBUILTTHEPRESSRELAXFCEONTHECONNECTINGBOLTSUNDERVARIOUSOPERATIONCONDITIONSARECOMPUTEDBYCOMMERCIALFEASOFTWAREFOURCRITERIASINCLUDINGSTRENGTHCRITERIASEPARATIONCRITERIAFATIGUECRITERIAMODALCRITERIAAREPRESENTEDCOMBININGTHEFOURCRITERIASABOVETWODIFFERENTMETHODSAREDEVELOPEDTOCALCULATETHEFEASIBLEAXIALPRELOADOFTHECONNECTINGBOLTSTHESTRESSSTRAINFIELDSOFTHECONNECTINGBOLTSUNDERVARIOUSOPERATIONCONDITIONSARECALCULATEDTHERESULTSSHOWTHATTHESTATICSTRENGTHFULLYMEETSTHEREQUIREMENTOFSTRENGTHDESIGNTHEDYNAMICACTERISTICSOFTHEROTSUCHASFIRSTTWELVEFREEMODESCONSTRAINTMODESPRESTRESSMODESARECALCULATEDANALYZEDTHESTRESSBASEDSTRAINBASEDFATIGUELIFEPREDICTIONMETHODSTHEPRINCIPLEOFFATIGUEDAMAGEACCUMULATIONAREANALYSIZEDTHEEFFECTSOFMEANSTRESSSTRESSCONCENTRATIONFACTMULTIAXIALSTRESSLOADSEQUENCEONFATIGURELIFEPREDICTIONSAREALSOCONSIDEREDATLASTTHEFATIGUELIFEOFTHECONNECTINGBOLTINTHEAEROENGINEROTISPREDICTEDACCDINGTOTHEMETHODDEVELOPEDINTHISTHESISKEYWDSAEROENGINE，CONNECTINGBOLT，AXIALPRELOAD，STRENGTH，F(xiàn)ATIGUELIFE

簡介：殺輯性士申酶臼瞠舀責士群再殺睜甘挺囂茸現(xiàn)酶TT茸觀覃籬亂工封摶避矽輯鷺裂工了F1甄1駐_廣眙藜珥殺環(huán)拿J阿暗弼碼殺環(huán)每望審弭孵謠牲矽瑪責、珥親、牲誼、苗謐舞轔瓤幸矽輔斯驏舍群黟莉巖勘RTL挈祟矽娶隉瞠矽鰭髯妊騎豎蕊是疆輩搗半輯驥0諑與動糲蚪蒙釁睡誓摹娶軍騎G9上GZ￡T酶顯I職DIFI魯槧髟≮唧日9蚓曙酶目男蓊螄畚犁群鄧牟翼珂當迥蟛翠茸拱珥殺朝噩哿。茸觀珂殺嘴琢、型哿材圭嗚罵參辨群驥由黲～由繕茸卷詢墮‘拳弭身冪封馨鞣單Y嘴露早髟僻疆僻弓朝茸拱再奈球誦也嘉輯性士申砰群Y章。圈鞲瞠豳暈礁茸硯填可‘砰珊瞠勒￡L|首明茸觀邁黧瞬碑疆U燼阜髦國叫萁曷哿砰單‘犁群明茸識再殺皆覡、曷哿暈殺群性士印蟛上弓舉霉勃茸硯珥殺章砰舞出翦茸覡目為皆，南一呷酶目。巢隕些擎箕的黧朝魄豳上勤吊茸觀翠目瞬釋塹凹丑朝珊鱈延抱章軾輩刨輔勤工刨一鏨與。僻胖朝再目翦業(yè)鋒娶狂碼殺朝釁釁曼磷罩茸輯奈馨健士印彭臻槧號母業(yè)雨‘醬靼延擅明裂薄疆擎髯葛目Y融囂號耳_K審茸拱‘“I4華孵明顴疆瞠瑕斟雨睥暗姑七B茸上割‘蟛增槧群。醬貊延搬朝舍；迪西助工琶擅明粵桑I臺群坐FF臺翠Y章瞽茸現(xiàn)珥殺朝莓百蟈朗革Y章釃革璐晦暇贏黼㈨＼乍

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簡介：東華大學工程碩士學位論文申請東華大學碩士學位論文航天鈦合金整體結構件高效加工工藝研究與工程應用學號G10056專業(yè)機械制造及其自動化工程碩士蹇悅導師李蓓智教授企業(yè)導師成群林研究員東華大學機械工程學院2016年5月東華大學工程碩士學位論文究可行工藝方案，優(yōu)化切削工藝參數(shù)，為鈦合金整體結構件高效加工提供科學依據(jù)。（3）以TC4鈦合金舵骨架零件為典型加工對象進行工程驗證。通過加工工藝參數(shù)優(yōu)化、專用工裝設計、刀具優(yōu)選、走刀軌跡優(yōu)化等措施，在確保和改善產(chǎn)品加工質(zhì)量的前提下，提高了舵骨架整體結構件的加工效率，縮短了加工周期。本文的研究成果可推廣應用于同類薄壁多型面結構件加工。關鍵詞航天整體結構件，銑削，有限元仿真，高效加工