Three-dimensionalsimulationsonexplosiveloadcharacteristicsof

underwaterexplosionnearfreesurface

MINGFu-ren; ZHANGA-man; YANG Wen-shan

doi:10.11883/1001-1455(2012)05-0508-07

Volume 32 Issue 5

Apr. 2014

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MINGFu-ren, ZHANGA-man, YANG Wen-shan. Three-dimensionalsimulationsonexplosiveloadcharacteristicsofunderwaterexplosionnearfreesurface[J]. Explosion And Shock Waves, 2012, 32(5): 508-514. doi: 10.11883/1001-1455(2012)05-0508-07

Citation:

MINGFu-ren, ZHANGA-man, YANG Wen-shan. Three-dimensionalsimulationsonexplosiveloadcharacteristicsof underwaterexplosionnearfreesurface[J]. Explosion And Shock Waves, 2012, 32(5): 508-514. doi: 10.11883/1001-1455(2012)05-0508-07

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Three-dimensionalsimulationsonexplosiveloadcharacteristicsof underwaterexplosionnearfreesurface

doi: 10.11883/1001-1455(2012)05-0508-07

1.
CollegeofShipbuildingEngineering,HarbinEngineeringUniversity,

Funds:

NationalNaturalScienceFoundationofChina(50939002,10976008,50809018)

Publish Date: 2012-09-25

Abstract

Abstract

Basedonthethree-dimensionalSPH method,thevariablesmoothinglengthmodificationis appliedtothetraditionallinked-listsearchalgorithm,andthestableapproachofdealingwithmultiphasematerialinterfaceisputforward. Throughsimulatingunderwaterexplosionoffreefield,the feasibilityandeffectivenessofthe modified methodareverified.Thethree-dimensionalnumerical modelisestablished,andtheprocessofunderwaterexplosionnearfreesurfaceisreproduced.Characteristicsofshockwavepropagation, pressurefieldandenergyfieldaresummedup.Theeffectofdifferentexplosiondepthontheinitialwatercolumnformationisstudied. Resultsshowthatfreesurface canattenuatethepeakpressureandimpulsetoonethirdandoneseventhoftheoriginalvalues,respectively. Withtheincreaseofdetonationdepth,curvatureoftheequivalentcylinderofpeakpressureratioandimpulseratiodecrease, andtheproducedwatercolumngraduallytransitsfrombroken andspraycolumntohighandnarrow mound.
- mechanicsofexplosion,
- truncationeffect,
- three-dimensionalSPH method,
- underwater explosion,
- nearfreefield