Analysis and Optimization on the Explosive ImpactResponse of Bolt Joint Structure

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1、AnalysisandOptimizationontheExplosiveImpactResponseofBoltJointStructureJingJINXinyueWUMechanicalEngineeringDepartmentMechanicalEngineeringDepartmentNavalUniv.ofEngineeringNavalUniv.ofEngineeringWuhan,ChinaWuhan,ChinaE-mail:naughtjj@yahoo.com.cnAbstract—TheblastloadresponseofpreciseboltFinit

2、eElementThepaperaddedpre-stressandsimulatedinteractionofboltmodelwasstudiedbyLS-DYNAsoftware.Firstly,theinitialandpartbycontactalgorithmbasedonthree-dimensionalFEstressofthreadwasaddedbythedroppingtemperaturemethod.model.Basedoncalculatingresults,theimpactresponseofThenthedynamicresponseand

3、deformationdamageoftheboltdifferentjointwascomparedandsimpledamagemodelwasmodelwerecalculatedbytheelastic-plasticconstitutivematerialcreated.Atlast,theanti-impactmethodsofdifferentboltjointequationandsurface-surfacecontactalgorithm,whichwereputforward.calculatingmodelsincludingboltjointandb

4、olt-nutjointwithandwithoutinitialstress.TheconcernedpositionwasfoundandasimpledamagemodelofthethreadjointwascreatedbasedonII.THEORETICANALYSISOFSOLVINGMETHODthecalculatedresults.Finallyoptimizationschemesfortheboltjointtoresistimpactwereputforwardafteranalyzingtheresults.A.ExplosiveShockwav

5、eTransmissionTheseschemesprovidedimportantinstructionsforthestructuralExpressingtheidealgasexplosiveshockwavedesignofimpactresistance.transmittingbythree-dimensionalEulerianequationofmotion:Keywords-boltjoint;impactresponse;LS-DYNA;optimization∂q∂f(q)∂g(q)∂h(q)(1)+++=0I.INTRODUCTION∂t∂x∂y∂z

6、Theboltjointisthemostcomprehensiveconnectingmethodofmostequipment.NowthestructureanalysisofeachWhereqisstatevector,equation(1)satisfieslawofmass,industryhaschangedfromsinglepartstaticanalyzingtomomentumandenergyconservation.f(q),g(q)andh(q)meansystemdynamicresponseanalyzing.Indynamicanalyzi

7、ng,thestatevariableflow,whichcanexpress:damageanalysisisacommonone.Inthemodernseawar,theworshipneedsfacingbattleanytime.Withusingprecision⎧ρ⎫⎧ρu⎫guidedmunitions,theprobabilityofshipattackedbyprecision⎪ρu⎪⎪2⎪⎪⎪⎪ρu+p⎪guidedmunitionsismoreandmore.Thelaserbo