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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