ApplicationofSPH methodtonumericalsimulationofshapedchargejet

LI Lei; SHEN Zhao-wu; LI Xue-ling; NI Xiao-jun

doi:10.11883/1001-1455(2012)03-0316-07

Volume 32 Issue 3

May 2014

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Article Navigation > Explosion And Shock Waves > 2012 > 32(3): 316-322

LIU Ming-shuang, LI Yu-long, TAO Liang, XU Fei, CHENG Lai-fei. A strain-rate-dependent dynamic constitutive model of 2D-C/SiC composites[J]. Explosion And Shock Waves, 2008, 28(5): 421-426. doi: 10.11883/1001-1455(2008)05-0421-06

Citation:

LI Lei, SHEN Zhao-wu, LI Xue-ling, NI Xiao-jun. ApplicationofSPH methodtonumericalsimulationofshapedchargejet[J]. Explosion And Shock Waves, 2012, 32(3): 316-322. doi: 10.11883/1001-1455(2012)03-0316-07

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ApplicationofSPH methodtonumericalsimulationofshapedchargejet

doi: 10.11883/1001-1455(2012)03-0316-07

1.
Departmentof ModernMechanics,UniversityofScienceandTechnologyofChina,
2.
Hefei230031,Anhui,China;

Funds:

NationalNaturalScienceFoundationofChina(51134012,51174183)

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Corresponding author: LI Lei
Publish Date: 2012-05-25

Abstract

Abstract

Basedonthesmoothedparticlehydrodynamics(SPH)methodinLS-DYNAsoftware,the shapedchargejetprocesswassimulated.Andthemechanismoftheshapedchargejetwasdiscussed accordingtothenumericalsimulationresults.Toanalyzetheaccuracy,effectivenessandsuperiority aboutthismethod,aswellastheerrorbroughtbydifferentinitialnumbersN oftouchingneighbors perparticle,thenumericalsimulationresultswerecomparedwithtwo-dimensional(2D)finiteelementresultsandtheoreticalcalculations. Theinvestigatedresultsshowthatsomeproblems,suchas griddistortion,windingandcontactpenetrationwhichoftenhappeninthefiniteelementmethod,can beavoidedintheSPH method,sothecalculationprocessbytheSPH methodisstable,andthecalculationprecisionishigherthanthatbythe2Dfiniteelementmethod. Therelativeerrorofthejettip velocityandthejetlengthcalculatedbytheSPH methodcomparedwiththefiniteelementresultsand theoreticalcalculationsarebothlowerthanfivepercent,thereforetheSPH methodisadaptablein multi-material,largedeformationproblemssuchasshapedcharges.ThemostidealNisfrom600to 1800,inwhichtherelativeerrorislowerthan3%andthecomputationalefficiencyishigh.
- fluid mechanics,
- initialnumberoftouchingneighborsperparticle,
- shapedchargejet,
- smoothedparticlehydrodynamicsmethod