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摘要: 采用波动理论,提出了水下爆炸冲击波防护的设计原则。在此基础上针对水下爆破工程安全防护 的实际情况,对提出的空气隔层衰减冲击波设想进行了实验研究,发现空气隔层能有效衰减冲击波峰值压力。 为了对空气隔层衰减冲击波能量特性进行研究,提出了基于小波包分析水下爆炸冲击波能量分布规律的方 法,发现水下爆炸冲击波能量分布频率比较广,在空气隔层作用下,各频率段的冲击波能量都有很好的衰减作 用,空气隔层对绝大部分频率段的冲击波能量衰减都在50%以上。研究结果表明,空气隔层能在水下爆破工 程安全防护中发挥积极作用,可以有效降低水下爆炸冲击波的破坏效应,具有实用价值。Abstract: Basedonthewavetheory,thispaperputsforwardthedesignprinciplesoftheprotectionagainstunderwaterexplosionshockwave. Besides,inlightoftheactualsituationofsafetyprotectionin underwaterblastingpractices,experimentalstudiesarecarriedouttotestthehypothesesregarding theattenuationofunderwatershockwavebytheairinterlayer.Itisfoundthattheairinterlayercan effectivelyattenuatetheshockwavepeakpressure.Inordertostudytheenergydistributioncharacteristicsoftheattenuationofunderwatershockwavebytheairinterlayer, thepaperproposesawayof approachingtheenergydistributionofunderwaterexplosionshockwavesfromwaveletanalysis.Given thattheenergydistributionofunderwaterexplosionshockwavesiswidelyrangedinfrequency,the paperfindsoutthatundertheimpactoftheairinterlayer,theshockwaveenergyineachfrequency rangehasdesirableattenuatingcapability,andthattheattenuatedshockwaveenergyinthemajorityof frequencyrangescanamountto50%oftheoriginal.Theresearchresultsshowthat,theairinterlayer playsapositiveroleinstrengtheningthesafetyprotectioninunderwaterblastingandeffectivelyreducethedestructiveeffectsofunderwatere plosionshockwaves,andhencehasapracticalvalue.
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Key words:
- mechanicsofexplosion /
- energydistribution /
- waveletanalysis /
- airinterlayer /
- underwater explosion
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