輥頸受均布載荷的四輥軋機輥系變形探討.pdf

1、武漢科技大學(xué)碩士學(xué)位論文輥頸受均布載荷的四輥軋機輥系變形探討姓名：童云春申請學(xué)位級別：碩士專業(yè)：機械電子工程指導(dǎo)教師：金曉宏20081118第1I頁武漢科技大學(xué)碩士學(xué)位論文AbstractThehi曲一qualitydemandforthestriprequireshigh—precisionofstripprofilecontr01Stripprofilecontrolmostlybasesonthetheoriesofelastic

2、deformationofrollersTheexistingtheoriesofelasticdeformationofrollersincludeanalyticalmethod，influencefunctiontheorynumericalcalculationmethodandSOonAstoanalyticalmethod，thereislimitationontherollingpressureassumptionAsto

3、numericalmethod，theprecisionofcalculationishigh，butitscalculationworkisSOheavythatitishardtobeappliedinengineeringAstoinfluencefunctiontheoryitiswidelyusedbecauseofnoassumptiononcurveofrollingpressureandsmalleramountofca

4、lculationAtpresent，theresearchesoninfluencefunctiontheoryarecarriedoutbyassumingtherollerneckloadedwiththeconcentratedloadthedifferencebetweentopandbottomelasticdeformationofrollersandstripnotinthemiddleofrollersarethoug

5、htless，theresultofelasticdeformationsofrollerswhichisformthemodelofrollerneckloadedwiththeconcentratedloadCan’taccordwithpracticewellInthispaperaccordingtostudyonthedifferencesbetweentopandbottomdeformationofrollers，whic

6、hisduetothedifferencebetweenthetwohousingsinstiffnesscoefficient，thepresent1／2elasticdeformationofrollersmodelisdifficulttomeettheprecisionofcalculationTosolvetheshortcomingsabovetheinfluencefunctionmechanicalmodelanddef

7、ormationequationofthewholerollerswhenrollerneckloadedwiththeuniforlnloadareestablishedinthispaperanditalsodiscussestherulesofthewholerollerselasticdeformationwhenstripsteelisinornotinthemiddleofrollersandleftandfightbend

8、ingforceisdifferentandSOon111emainworksareasfollowing：1)Byusingthefiniteelementmethodandinfluencefunctiontheorythedifferencesofrollerselasticdeformationbetweenrollernecksloadedwiththeconcentratedloadand10adedwiththeunifo

9、rmloadareanalyzedcomparativelywhichaffectsthickness2)InfluencefunctiontheoryisadoptedtoanalyzetheinfluenceonthetopandbottomrollerselasticdeformationsforthedifferentstiffnessofthesinglehousingAsaresult，thepresent1／2roller

10、selasticdeformationsaffectsthecalculatingprecisionofstripprofileandthicknesswithoutconsideringthedifferencebetweentopandbottomrollerselasticdeformations3)Themechanicalmodelanddeformationequationsofthewholerollerselasticd

11、eformationareestablishedTheinfluencefunctionequationsofrollerneckloadedwiththeuniform10adareputintothemechanicalmodelandthecaseofstripnotinthemiddleofrollersisconsideredMATLABisemployedtocompilethesyntheticalcalculatingp

12、rogramofstripshapeafteroffcenterrolling4)Accordingtocalculatingtherollingoffcenterconditionssuchasstripnotinthemiddleofrollers，diflbrentleftandrightbendingforce，thedisproportionationthicknessofincomingmaterial，thedigital