Baseconstraintformsofhemisphericalshock-wavestrapstructures

LI Xiao-jie; QIN Xiao-yong; YAN Hong-hao

doi:10.11883/1001-1455(2010)01-0007-05

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LI Xiao-jie, QIN Xiao-yong, YAN Hong-hao. Baseconstraintformsofhemisphericalshock-wavestrapstructures[J]. Explosion And Shock Waves, 2010, 30(1): 7-11. doi: 10.11883/1001-1455(2010)01-0007-05

Citation:

LI Xiao-jie, QIN Xiao-yong, YAN Hong-hao. Baseconstraintformsofhemisphericalshock-wavestrapstructures[J]. Explosion And Shock Waves, 2010, 30(1): 7-11. doi: 10.11883/1001-1455(2010)01-0007-05

LI Xiao-jie, QIN Xiao-yong, YAN Hong-hao. Baseconstraintformsofhemisphericalshock-wavestrapstructures[J]. Explosion And Shock Waves, 2010, 30(1): 7-11. doi: 10.11883/1001-1455(2010)01-0007-05

Citation:

LI Xiao-jie, QIN Xiao-yong, YAN Hong-hao. Baseconstraintformsofhemisphericalshock-wavestrapstructures[J]. Explosion And Shock Waves, 2010, 30(1): 7-11. doi: 10.11883/1001-1455(2010)01-0007-05

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Baseconstraintformsofhemisphericalshock-wavestrapstructures

doi: 10.11883/1001-1455(2010)01-0007-05

1.
StateKeyLaboratoryofStructuralAnalysisforIndustrialEquipment,
2.
DalianUniversityofTechnology,Dalian116023,Liaoning,China;

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Corresponding author: LI Xiao-jie
Publish Date: 2010-01-25

Abstract

Abstract

Theequivalentstressesofhemisphericalshock-wavestrapstructurewerecalculatedbythe finiteelementprogramLS-DYNAfordifferentconstraintformsandcomparedwiththeexperimental results.Theresultsshowthatthestressconcentrationhappensontheshellneartheentranceandexhaustportandthelocalstressesarefarhigherthanthose fotherparts.Inadditiontothesiteof stressconcentration,themaximumstressisatthethree-fourthoftheheightforthescalespherical shellmodel.Theoverallstressleveldecreasessignificantlyforthesphericalshellwiththefreebottom. Usingthefreebasetoplacethesphericalshellcanfurtherenhanceitscapacityagainstspherical implosion.Contrastingwiththeexperiments,themaximumstresslocationisinlinewiththenumericalresultsafterreinforcingpartsofstressconcentration. Byusingthefreebasetoplacethespherical shellonthegroundinthedesign,itcannotonlyimprovetheanti-explosioncapacityofspherical shells,butalsosavethefoundationtreatment,substantiallyreducesthecostofhemisphericalshock wavestrapstructures.
- mechanicsofexplosion|stress,
- constraint|explosivevessel|shockwaves,