欢迎来到天天文库
浏览记录
ID:28346816
大小:7.60 MB
页数:73页
时间:2018-12-09
《钢梁-柱落锤冲击实验及数值模拟分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、山东建筑大学硕士学位论文ExperimentAndNumericalSimulationAnalysisOfSteelBeam—ColumnImpactedByDroppingHarmmerLiYueqiang(StructuralEngineering)DirectedbyXiFengABSTRACTInrecentyears,steelstructurehasbeenusedincreasinglyincivilengineeringduetOitswidelyrecognizedadvantage
2、s,whichpromotesthedevelopmentofrelevantdesigntheoryandacademicresearchtoacertainextent.Specially,studyontheresistanceofsteelstructuresunderexplosionandimpactloadisbecomingahotspot.Withinthedesignlife,inadditiontotheconventionaldesignload,steelstucturesal
3、sobearaccidentalexplosionorimpactloadsometimes,SOtheymusthavetheappropriateresistance.Thedynamicresponseunderimpactloadofsteelbeamsandcolumns,whicharethemainload-beatingmembers,isthefirstproblemtobesolved.Atthesametime,itCanalsoprovidesthebasisforfurther
4、design.Thisarticle‘mainlystudysthedynamicresponseofI-shapedcross-sectionbeam—columnsunderimpactload,includingimpactexperiment,finiteelementsimulationandtheequivalentsingledegreeoffreedommodelanalysis.Intheexperiment,weuseacylindricalhelicalcompressionspr
5、ingtOapplytheaxialload,recordthedeformationprocessandstrainofthememberusingIligIl—speedcamerasanddynamicsignalacquisitionsystem.Experimentalre钒dtsshowthat:whensubjectedtOlateralmidpointimpacteffect,simplysupportedbeam-columnmembersappearnotonlybendingdef
6、ormationintheplanebutalsobendingandtorsionaldeformationoutoftheplane;andthelocalbucklingofwebisthereasonofbendingandtorsiondeformation;thebendingdeformationintheplaneandtorsionaldeformationoutoftheplanewillincreaseastheincreasingimpactvelocityandaxialloa
7、d,butaspecificrangeofimpactvelocityandaxialloadwilldecreasetorsionaldeformationoutoftheplane;changesinaxialforcerelatetotheaxialdeformationandthestiffnessofthespring,whichindicatesthatusinglessrigid万方数据山东建筑大学硕士学位论文compressionspringtOapply趾axialloadissuit
8、able.UsingthesoftwareANSYS/LS-DYNA,simulationabouttheexperimenthasbeenmade.Bythecomparisonofdeformingprocess,thefinaldisplacementandstraindata,wefindoutthatbothfiniteelementanalysisandexperimentresultshaveagoodmatch,showin
此文档下载收益归作者所有