2011 Vol. 31, No. 3
Display Method:
2011, 31(3): 225-331.
doi: 10.11883/1001-1455(2011)03-0225-07
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Abstract:
Afunctionallylayeredhoneycombmodelisproposedtocontrolthedynamicenergyabsorptionofferedbyuniformhoneycombs. Thein-planedynamicresponsesarecontrolledbythevariation ofthecellradius.Thenumericalresultsshowthatthroughtheproperchoiceofthegradientcoefficien...
Afunctionallylayeredhoneycombmodelisproposedtocontrolthedynamicenergyabsorptionofferedbyuniformhoneycombs. Thein-planedynamicresponsesarecontrolledbythevariation ofthecellradius.Thenumericalresultsshowthatthroughtheproperchoiceofthegradientcoefficien...
2011, 31(3): 232-236.
doi: 10.11883/1001-1455(2011)03-0232-05
Abstract:
AtechniquebasedonluminousfluxmethodwasappliedtomeasureshearstraininSHPSB (splitHopkinsonpressurebar)experiment.Theopticalsetupconsistedofthreemajorcomponents:a collimationlaser,aphotoelectricsensingapparatusandtwoopticalbaffles.Resultsfromavalidexper...
AtechniquebasedonluminousfluxmethodwasappliedtomeasureshearstraininSHPSB (splitHopkinsonpressurebar)experiment.Theopticalsetupconsistedofthreemajorcomponents:a collimationlaser,aphotoelectricsensingapparatusandtwoopticalbaffles.Resultsfromavalidexper...
2011, 31(3): 237-242.
doi: 10.11883/1001-1455(2011)03-0237-06
Abstract:
ARMAparameterscanbeusedasfeaturesfordiscriminationbetweennuclearexplosions andearthquakes.Currentmethodsforfeatureextractionarelinearandonlytakesadvantageofthe second-orderstatistic,sotheclassificationaccuracyofisnothigh.Tosolvethisproblem,amethod fo...
ARMAparameterscanbeusedasfeaturesfordiscriminationbetweennuclearexplosions andearthquakes.Currentmethodsforfeatureextractionarelinearandonlytakesadvantageofthe second-orderstatistic,sotheclassificationaccuracyofisnothigh.Tosolvethisproblem,amethod fo...
2011, 31(3): 243-249.
doi: 10.11883/1001-1455(2011)03-0243-07
Abstract:
Thecouplingofsmoothedparticlehydrodynamics(SPH)withthefiniteelementmethod (FEM)ispresentedtomakefulluseofthesuperiorityofSPHindealingwithlargedeformationand thehighaccuracyofFEM.ThecoupledSPH-FEMalgorithmemploysSPHparticlesinthehigherdistortionregion...
Thecouplingofsmoothedparticlehydrodynamics(SPH)withthefiniteelementmethod (FEM)ispresentedtomakefulluseofthesuperiorityofSPHindealingwithlargedeformationand thehighaccuracyofFEM.ThecoupledSPH-FEMalgorithmemploysSPHparticlesinthehigherdistortionregion...
2011, 31(3): 250-255.
doi: 10.11883/1001-1455(2011)03-0250-06
Abstract:
TheKelvinimpulseprinciplewasappliedtoanalyzethemajorinfluencefactorsintheformationofthewaterjetbytheinteractionbetweenanunderw terexplosionbubbleandawaterbottom boundary.Andaseriesofexperimentswereconductedinawatertanktoinvestigatethewaterjet phenome...
TheKelvinimpulseprinciplewasappliedtoanalyzethemajorinfluencefactorsintheformationofthewaterjetbytheinteractionbetweenanunderw terexplosionbubbleandawaterbottom boundary.Andaseriesofexperimentswereconductedinawatertanktoinvestigatethewaterjet phenome...
2011, 31(3): 256-262.
doi: 10.11883/1001-1455(2011)03-0256-07
Abstract:
Anewtechnologyfortestingdynamicpropertiesofmaterialswasproposedbydevelopingan experimentalsetupbasedonasplit-Hopkinsonpressurebarsystem.Theexperimentalsetupcanbe usedindynamicindentationexperimentstoobtaintheindentationdisplacementsofmaterialsandthe ...
Anewtechnologyfortestingdynamicpropertiesofmaterialswasproposedbydevelopingan experimentalsetupbasedonasplit-Hopkinsonpressurebarsystem.Theexperimentalsetupcanbe usedindynamicindentationexperimentstoobtaintheindentationdisplacementsofmaterialsandthe ...
2011, 31(3): 263-267.
doi: 10.11883/1001-1455(2011)03-0263-05
Abstract:
UnderwaterexplosionexperimentswerecarriedoutforPETNcylindersinawatertankand elementarydataaboutbubblemotionsunderfree-fieldconditionswereobtainedbyusingthehighspeedphotographytechnology. Resultsshowthatthebubbledynamicsofcylindricalchargesdiffers fro...
UnderwaterexplosionexperimentswerecarriedoutforPETNcylindersinawatertankand elementarydataaboutbubblemotionsunderfree-fieldconditionswereobtainedbyusingthehighspeedphotographytechnology. Resultsshowthatthebubbledynamicsofcylindricalchargesdiffers fro...
2011, 31(3): 268-273.
doi: 10.11883/1001-1455(2011)03-0268-06
Abstract:
Basedona50-mm-diametersplitHopkinsonpressurebar(SHPB)systemandaself-developedconcrete- likematerialrapidheatingdevice,impactcompressiveexperimentswerecarriedout. Thestress-straincurvesatdifferenttemperatureandthreekindsofimpactvelocitieswereobtained....
Basedona50-mm-diametersplitHopkinsonpressurebar(SHPB)systemandaself-developedconcrete- likematerialrapidheatingdevice,impactcompressiveexperimentswerecarriedout. Thestress-straincurvesatdifferenttemperatureandthreekindsofimpactvelocitieswereobtained....
2011, 31(3): 274-278.
doi: 10.11883/1001-1455(2011)03-0274-05
Abstract:
Aimedatquasi-isentropiccompressionexperiments,abackwardintegrationmodelwasproposedbyconsi- deringlinearelastic-plasticeffects.Thequasi-isentropiccompressionexperimentdata ofRDX(210)crystalfromtheZmachineofSandiaNationalLaboratorywerenumericallyanalyz...
Aimedatquasi-isentropiccompressionexperiments,abackwardintegrationmodelwasproposedbyconsi- deringlinearelastic-plasticeffects.Thequasi-isentropiccompressionexperimentdata ofRDX(210)crystalfromtheZmachineofSandiaNationalLaboratorywerenumericallyanalyz...
2011, 31(3): 279-284.
doi: 10.11883/1001-1455(2011)03-0279-06
Abstract:
Theengineeringstress-engineeringstrainrelationsofN-1steelweremeasuredusingSHTB atdifferentstrainratesfrom10-3to103s-1.Theresultswereanalyzed,andtherate-hardeninglawof N-1steelwasdetermined.Thetruestressatthecenterofthefracturedcross-sectionwascalcula...
Theengineeringstress-engineeringstrainrelationsofN-1steelweremeasuredusingSHTB atdifferentstrainratesfrom10-3to103s-1.Theresultswereanalyzed,andtherate-hardeninglawof N-1steelwasdetermined.Thetruestressatthecenterofthefracturedcross-sectionwascalcula...
2011, 31(3): 285-289.
doi: 10.11883/1001-1455(2011)03-0285-05
Abstract:
Inordertoinvestigateignitioncharacteristicofenergeticmaterialsradiatedbylaser,agasphasereactionmodelwasestablishedusingdetailedchemicalkinetics. Inthemodel,45speciesand 232reactionstepswasusedtodescribegasphasemechanism.Thenthemodelwasusedformodeling...
Inordertoinvestigateignitioncharacteristicofenergeticmaterialsradiatedbylaser,agasphasereactionmodelwasestablishedusingdetailedchemicalkinetics. Inthemodel,45speciesand 232reactionstepswasusedtodescribegasphasemechanism.Thenthemodelwasusedformodeling...
2011, 31(3): 290-294.
doi: 10.11883/1001-1455(2011)03-0290-05
Abstract:
Throughthefieldtests,thepropagationregularityofthedirectgroundshockproducedby theexplosionofconventionalchargeatdifferentburieddepthsinfreefieldoflimestonewasexplored. Thedirectgroundshockeffectofexplosionatdifferentburieddepthswasdescribedbytheproce...
Throughthefieldtests,thepropagationregularityofthedirectgroundshockproducedby theexplosionofconventionalchargeatdifferentburieddepthsinfreefieldoflimestonewasexplored. Thedirectgroundshockeffectofexplosionatdifferentburieddepthswasdescribedbytheproce...
2011, 31(3): 295-299.
doi: 10.11883/1001-1455(2011)03-0295-05
Abstract:
Theunderwaterexplosionmechanismoffluid-structureinteractionwasexploredbasedon thespectralelement.Afieldseparationtechniquewasproposedtoavoidthedistortionphenomenonof thetotalfieldmodelproducedbythepropagationofincidentwaveinthefluidmesh.Andascattered...
Theunderwaterexplosionmechanismoffluid-structureinteractionwasexploredbasedon thespectralelement.Afieldseparationtechniquewasproposedtoavoidthedistortionphenomenonof thetotalfieldmodelproducedbythepropagationofincidentwaveinthefluidmesh.Andascattered...
2011, 31(3): 300-305.
doi: 10.11883/1001-1455(2011)03-0300-06
Abstract:
Inordertoinvestigatetheexpansioncharacteristicsofthehighpressurecombustiblegasjet inabulk-loadedliquidandtoexplorethecontrolmethodsforimproveingthejetstability,acylindrical four-stagestepped-wallchamberwasdesigned.Usingahigh-speedkinescopesystem,thee...
Inordertoinvestigatetheexpansioncharacteristicsofthehighpressurecombustiblegasjet inabulk-loadedliquidandtoexplorethecontrolmethodsforimproveingthejetstability,acylindrical four-stagestepped-wallchamberwasdesigned.Usingahigh-speedkinescopesystem,thee...
2011, 31(3): 306-310.
doi: 10.11883/1001-1455(2011)03-0306-05
Abstract:
Basedonthefactthatinanexperimentaldevicefilledwithexplosiveandfluoride,theexplosionofthecentralexplosivecoulddispersethefluorideoutofthedevice, thenthefluoridewouldintenselyreactwiththeliquidintheconfinedcontainerandreleaseplentifulenergy, threeexper...
Basedonthefactthatinanexperimentaldevicefilledwithexplosiveandfluoride,theexplosionofthecentralexplosivecoulddispersethefluorideoutofthedevice, thenthefluoridewouldintenselyreactwiththeliquidintheconfinedcontainerandreleaseplentifulenergy, threeexper...
2011, 31(3): 311-316.
doi: 10.11883/1001-1455(2011)03-0311-06
Abstract:
Toexploretheinfluenceofthechamberboundaryshapeonthecombustioncontrolina bulk-loadedliquid-mediumelectrothermal-chemicalgun,theplasmajetpropagationintheliquidmediumwasexperimentallyinvestigatedbyusingahigh- speeddigitalcamera.Specialattentionwaspaidto...
Toexploretheinfluenceofthechamberboundaryshapeonthecombustioncontrolina bulk-loadedliquid-mediumelectrothermal-chemicalgun,theplasmajetpropagationintheliquidmediumwasexperimentallyinvestigatedbyusingahigh- speeddigitalcamera.Specialattentionwaspaidto...
2011, 31(3): 317-321.
doi: 10.11883/1001-1455(2011)03-0317-05
Abstract:
Abstract:Bytakingthepulsedischargeswithdifferentcapacitancesastheinputenergy,semiconductorbridges( SCB)withandwithoutleadtrinitroresorcinate(LTNR)wereexperimentallyinvestigated, respectively.Experimentalresultsshowthatthereexistdifferencesinignitione...
Abstract:Bytakingthepulsedischargeswithdifferentcapacitancesastheinputenergy,semiconductorbridges( SCB)withandwithoutleadtrinitroresorcinate(LTNR)wereexperimentallyinvestigated, respectively.Experimentalresultsshowthatthereexistdifferencesinignitione...
2011, 31(3): 322-325.
doi: 10.11883/1001-1455(2011)03-0322-04
Abstract:
Aslideline/erodingalgorithm,whichwasimplementedintothe2DLagrangianelasticityplasticityhydrodynamiccodeLTZ- 2D,wasimproved.Thecellerodingcriterionwaschangedfromthe accumulativeplasticstraintoanintegratedcriterionmadeoftheaccumulativeplasticstrain,thed...
Aslideline/erodingalgorithm,whichwasimplementedintothe2DLagrangianelasticityplasticityhydrodynamiccodeLTZ- 2D,wasimproved.Thecellerodingcriterionwaschangedfromthe accumulativeplasticstraintoanintegratedcriterionmadeoftheaccumulativeplasticstrain,thed...
Time-frequencyrepresentationanalysisinunderwaterexplosiveshockwave
signalsbasedonanimprovedHHTmethod
2011, 31(3): 326-331.
doi: 10.11883/1001-1455(2011)03-0326-06
Abstract:
Basedonthecharactersofunderwaterexplosionshockwaves,animprovedHilbert-Huang transform (HHT)methodwasproposedbytakingtheadvantageofHHTinprocessingnon-stationarysignalsandcombiningwaveletdecompositionandcorrelationcoefficientfiltering. Intheimproved HH...
Basedonthecharactersofunderwaterexplosionshockwaves,animprovedHilbert-Huang transform (HHT)methodwasproposedbytakingtheadvantageofHHTinprocessingnon-stationarysignalsandcombiningwaveletdecompositionandcorrelationcoefficientfiltering. Intheimproved HH...
2011, 31(3): 332-336.
doi: 10.11883/1001-1455(2011)03-0332-05
Abstract:
TheW-Cualloypowderswerepreparedbyhigh-energyball-milling.TheW-Cualloyaslinermaterialswasfabricatedbyexplosiveconsolidation. Theconsolidatedsamplehadatheoreticaldensityof99.6%. ThesamplewasdeterminedbyEPMA,andtheresultsshowedthatthecomposition anddist...
TheW-Cualloypowderswerepreparedbyhigh-energyball-milling.TheW-Cualloyaslinermaterialswasfabricatedbyexplosiveconsolidation. Theconsolidatedsamplehadatheoreticaldensityof99.6%. ThesamplewasdeterminedbyEPMA,andtheresultsshowedthatthecomposition anddist...
