Effectsofvibration-isolatingtrenchongroundvibration

surroundingblastcontainmentchambe

HUBa-yi; CHENShi-yong; GUYan; LIUYu; LIUCang-li

doi:10.11883/1001-1455(2012)06-0647-06

Volume 32 Issue 6

Apr. 2014

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HUBa-yi, CHENShi-yong, GUYan, LIUYu, LIUCang-li. Effectsofvibration-isolatingtrenchongroundvibrationsurroundingblastcontainmentchambe[J]. Explosion And Shock Waves, 2012, 32(6): 647-652. doi: 10.11883/1001-1455(2012)06-0647-06

Citation:

HUBa-yi, CHENShi-yong, GUYan, LIUYu, LIUCang-li. Effectsofvibration-isolatingtrenchongroundvibration surroundingblastcontainmentchambe[J]. Explosion And Shock Waves, 2012, 32(6): 647-652. doi: 10.11883/1001-1455(2012)06-0647-06

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Effectsofvibration-isolatingtrenchongroundvibration surroundingblastcontainmentchambe

doi: 10.11883/1001-1455(2012)06-0647-06

1.
InstituteofFluidPhysics,ChinaAcademyofEngineeringPhysics,

Publish Date: 2012-11-25

Abstract

Abstract

Aseriesofblastexperimentswithandwithoutvibration-isolatingtrencheswereimplementedintheblastcontainmentchamberwithanellipticconewhichhavinganinsidediameterof2mand awallthicknessof0.4m.Andtheverticalandhorizontalgroundvibrationvelocitiesat6different pointsonthesurroundinggroundofthechamberweremeasured.Theexperimentalresultsshowthat thegroundvibrationdurationislessthan0.2seconds,thefrequencyspectraoftheverticalandhorizontalvibrationsareinthe20- 500Hzand200-800Hzranges,respectively.Thehorizontalvelocity amplitudesafterattenuationbythetrenchesareone-tenthofthosebeforeattenuation,aswellasonefourthtoone- thirdfortheverticalvelocityamplitudes.Butthetrencheshavenoobviouseffectonthe frequencyspectraofthegroundvibrationwaves.Thevibration-isolatingtrencheswith1mdepthhave noattenuationeffectontheblastseismicwaves,buttheattenuationeffectwillberemarkablewhen thedepthsofthetrenchesare1.5-2.0timesaslongasthewavelengthsoftheRayleighwaves.
- mechanicsofexplosion,
- vibration velocity,
- blastcontainmentchamberblastseismic waves,
- chamber