圖像測量與有限元融合的金屬結(jié)構(gòu)應(yīng)力監(jiān)測技術(shù)研究.pdf

1、武漢理工大學(xué)碩士學(xué)位論文圖像測量與有限元融合的金屬結(jié)構(gòu)應(yīng)力監(jiān)測技術(shù)研究姓名：何山申請學(xué)位級別：碩士專業(yè)：機械制造及其自動化指導(dǎo)教師：趙章焰；唐智奮201205武漢理工大學(xué)碩士學(xué)位論文AbstractMetalstructureisusedwidelyinbuildings，bridges，engineeringmachinery，shipbuildingandotherfieldsItssafetyandreliabilityisdir

2、ectlyrelatedtothesafetyofhumanlifeStressrealtimemonitoringofmetalstructuresCaneffectivelyevaluatethesafetyofthestructure，andsendwarninginformationbeforestructuresfailureThispaperattemptstoestablishanewapproach：basedoncom

3、putergraphicsmeasureandfmiteelementmethod，throughoneormorecameratoobtaindisplacementofcharacteristicpointsonstructures，theninputthesedispalcementdatatocorrespondingfiniteelementmodel，astheinitialdisplacementofthefiniteel

4、ementmodel，thengetstresscloudsofthestruturebycalculatingTheoverallstiffnessmatrixaccuratelydepictsthephysicalpropertiesofthestructure；thesolutionoftheoverallstiffnessequationreflectstheresponseofthestructureunderloadsThe

5、oreticalanalysisfoundthat：(1)nodeloadandnodaldisplacementsexistequivalentrelation，whichindicatesthatusingnodaldisplacementsinsteadtheequivalentnodalforceswillnotaffecttheoverallstiffnessequationsolution，andthenodaldispla

6、cementsCanbemeasuredbytheimage；(2)stressmonitoringonlyneedtomeasurethedisplacementofnodalswhichnodalforceisnotequalto0Basedonthetechnicalrouteandtheoreticalanalysisabove，thispaperusesVCtocallANSYSsoftware，throughtheimage

7、processingalgorithmtoacquirefeaturepointdeformation，andtheninputthesedeformationdatastoANSYS，likethis，realizethemethodrapidlyThismethodhasthefollowinginnovations：1)Realizenoncontactstressmonitorofstructures，canbeappliedt

8、osomespecialoccasions；2)Canobtains晚ssdistributioncloudpicturesoftheintegralstructure，includedinternalKffeSSinformations(Thestrainresistancemeasurementonlygetsponstressonthesurfaceofstructure)；3)Canconsidertheinfluenceofg