立式连退炉带钢振动特性分析

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1、重庆大学硕士学位论文II英文摘要ABSTRACTVerticalcontinuousannealingisanadvancedproductiontechnologyinproducinghigh-gradestrips,whichhastheincomparableadvantagethanotherannealingprocesses.Fastcoolingtechniqueisthecoretechnologyofcontinuousannealing.Evenverticalannealingfurnacesectionofhig

2、h-speedimpactofthefastcoolingjetwillcausetheviolentvibrationofstrip.Thevibrationwillcausemanyqualityproblemsofstripsuchasunevenorevenbreakage.Striphot-dipgalvanizinglineisalsofacethesameproblem.Atpresent,thecontact-typeofinstallationstabilizingrolliswidelyusedtoeliminatev

3、ibration.WhileelectromagneticsuppressiontechniqueisusedbysomeenterprisesabroadandBaoSteel.Butboththesetwotechniquesareallimperfection.Referringtotheactualworkingcharacteristicsthatstripinthefastcoolingpartofaverticalannealingfurnacesection,andcombiningtheexistingliteratur

4、e,wewillstudyhowtoestablishtheexperimentalfacilityofsimulationofstripvibrationunderlaboratoryconditionsanditsresearchmethods.UndertheenvironmentofANSYSsoftware,modalanalysiswascarriedoutonthedrapingstripwithtakingadvantageoffiniteelementanalysis.Theinhomogeneityofthesurfa

5、ceforcewhichtheimpactjetflowbringstostrip,thedifferenceofbothsides,thevolatilityofairflowandthedisorderoftheimpactjetflowcausethevibrationofthestrip,whosedistortionandmovementactonstripinreturn.Thisbringsaboutcomplexmultiplerepeatedinteractioncoupling.Theincreasingofstrip

6、’storsionalpendulumamplitudeandthejammedoftouchablenozzlearemainlycausedbyself-motivationcyclingexpansileeffectwhichproducedinstripvibrationprocess.Experimentexaminestheinfluenceofstripvibrationwithdifferentnozzle’sformsofthespraybox.Italsoprobeintothecombinationbox’sjets

7、treamvelocity,striptension,stripsteelrunningdeviation,velocitydifferenceofbothleftandrightspraybox,andstripthicknessandtheirinfluencesonstrip’svibrationamplitude,peakvalueandspectraldistribution.Theexperimentwillexplore3techniqueproposalsoftheinhibitionofthestripvibration

8、withoutexternalsuppressionmeasuressuchasstabilizingroll.Throughtheweakenedincentiveandtheinhibit