隔振沟对爆炸塔周边地表振动的影响

胡八一; 陈石勇; 谷岩; 刘宇; 刘仓理

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

隔振沟对爆炸塔周边地表振动的影响

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

1.
中国工程物理研究院流体物理研究所,四川绵阳621900

详细信息

通讯作者:
胡八一

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出版历程
- 刊出日期: 2012-11-25

Effectsofvibration-isolatingtrenchongroundvibration surroundingblastcontainmentchambe

1.
InstituteofFluidPhysics,ChinaAcademyofEngineeringPhysics,

摘要

摘要: 对内径2m、壁厚0.4m 的椭球封头爆炸塔进行有、无隔振沟条件下的对比爆炸实验,并监测塔体周边6个测点的地表竖向及水平方向的振动速度。研究结果表明:地表质点的振动持续时间小于0.2s,竖向振动频谱在20~500Hz范围内,水平方向振动频谱则在200~800Hz范围内;隔振沟使水平方向振动幅度衰减至原来的1/10,对竖向振动幅度衰减至原来的1/4~1/3,对地表振动频率无明显影响;爆炸塔隔振沟的深度为1m 时,对爆炸地震波无任何衰减作用,仅当深度达到1.5~2.0倍瑞利波波长时(5.6~7.5m)才会产生明显的隔振效果。
- 爆炸力学 /
- 振动速度 /
- 爆炸地震波 /
- 爆炸塔
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