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简介：MicroandNanotechnologyareengineeringonanextremelysmallscale.Alreadytheyarebeingappliedtocreatemanynewproducts.Nanotechnologyispredictedtobecomethebasisforremarkablypowerfulandinexpensivecomputers,fundamentallynewmedicaltechnologiesthatcouldsavemillionsoflives,sensorsimportantinmilitaryapplicationaswellasenvironmentalprotection.Themainaimofthisreviewistoconcentrateinformationfromdifferentprintedandonlinesourcesandhelptomakearightdecisioninverydynamicsensormarketaswellasletknowwhatweshouldexpectinthenearestfuture.

简介：ＳｏｌｉｄＭｏｄｅｌｉｎｇＥｒｏｒ：ＡｎａｌｙｓｉｓａｎｄＣｏｍｐｅｎｓａｔｉｏｎ①ＸｕＺｈｉｇａｎｇＨｕａｎｇＫｅｚｈｅｎｇＡｉＸｉｎｇＳｈａｎＬｉａｎｙｅＣｏｌｅｇｅｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＳｈａｎｄｏｎｇＵｎｉｖｅｒｓｉ...

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简介：Widthspreadisusuallyconsideredinhotrolling,nevertheless,itcanbeignoreincoldrolling.Inordertocontrolthecrownandflatnessbettersimultaneouslyandrealizethedecouplingofcrownandflatness,thetransversedisplacementfunctionofstripisdefinedanddeduced.Thefactorsthataffectsthewidthspreadareanalyzingwiththefunction.Accordingtotheunchangedprincipleofvolumebeforeandafterrolling,theflatnessmodelwhichconsidersthewidthspreadisdeduced.Throughthemodel,thetransversemetalflowingofdifferentstandsanddifferentthicknessisanalyzing,itisfoundthatthewidthspreadisbiggestincoldrollingattheNo.1standbecauseofthemaximumthicknessandreductionandtheminimumdeformationresistance.Itgivesagoodfoundationforthedecouplingofcrownandflatness.

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简介：Theinstabilityofboreholewallisalwaysadifficultquestionindrillingboreholeprogress.Itincreasesthecostofproductionandprolongsproductioncycle.Soithasasignificantresearchvalue.Consideringtheeffectofmudpressureandporepressureonthestabilityofboreholewall,thispaperestablishesamathmodelbyapplyingthetwo-dimensionalbondtheoryofBiot.Itappliesthemethodofthenumericalsimulationtoanalyzetheeffectofmudpressureandporepressureonthestabilityofboreholewall.Thesimulationresultsshowthatthemudpressureimposesgreatinfluenceonstressfieldandonthedeformationofboreholesoil,whichprovidesatheoreticalbasisduringthedrillingprocesstoavoidtheinstabilityoftheboreholeandtostudyhowtoselectreasonablemudandmudpressure.

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简介：Thediaphragmofsteamturbineisoneofthemainpartsofthepassageunitforairflowingandthediaphragmofsteamturbineisgenerallymadebywelding,butduringthecourseofwelding,somecracksoftenhavehappened,thesecracksthreatensafetyproductiononthespot,soitisnecessarytoanalyzethestrengthofsteamturbinediaphragmwithacrack.Forstudyingitsworkingconditionandperformancewithacrack,thethree-dimensionalfiniteelementmodel(FEM)withthesoftwareANSYS10.0isestablishedaccordingtotheactualworkingparameters.Withthemodel,thedeformationresultsandstressfieldresultsareanalyzedandthemaximumdisplacementandstressvaluearecalculated,meanwhile,themaximumstresschangewithcrackdepthofsteamturbinediaphragmisanalyzed.Itprovidesagoodfoundationforsolvingtheprobleminproduction.

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简介：Thediaphragmofsteamturbineisoneofthemainpartsofthepassageunitforairflowing.Forstudyingitsworkingconditionandperformance,thethree-dimensionalfiniteelementmodel(FEM)withthesoftwareANSYS10.0isestablishedaccordingtotheactualworkingparameters.Withthemodel,thedeformationresultsandstressfieldresultsareanalyzedandthemaximumdisplacementandstressvaluearecalculated,meanwhile,theircorrespondingpositionsarefound.Itprovidesagoodfoundationforsolvingtheprobleminproduction.

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简介：Stiffeneristheimportantmissilestructuretoensurethestructuralstrengthofthemissile.Inordertoimprovethedesignefficiencyandthequalityofthemissilestiffener,themethodsofmissilestiffenerrapidmodelingandanalysisareproposed.First,theproblemsoftraditionalmanualmodelingofthestiffenerareanalyzed.Accordingtotheproblemsandactualrequirementofmodeling,volumedecompositionmethodisusedtodividethestiffenerintotheuppersection,thelowersectionandthewebinorderforfeatureanalysisandparameterextraction.ThenbasedontheparametersthebasicunitdecomposedaboveiscreatedforBooleanoperationtoestablishthestiffener.Finally,arapidstiffenermodelingandanalysisprogramweredevelopedbasedonUGOpenAPI,themodelingandanalysisresultvalidatesthefeasibilityofthemethod.

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