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摘要: 为了研究金属导爆索的水声特性,进行了水下爆炸压力测试和气泡脉动实验,获得了金属导爆索 水下爆炸冲击波传播和衰减特性及气泡脉动特性。研究了金属导爆索水下爆炸的声压级、声持续时间、混响 效应和功率谱特性,结果表明:(1)金属导爆索水下爆炸声压级较高,具有很强的声功率;(2)金属导爆索水下 爆炸后产生的气泡脉动和随后产生的大量小气泡持续时间长,能够显著提高水下爆炸的混响效应和持续时 间;(3)金属导爆索水下爆炸声的频率范围非常广,在各频率范围内都有很强的能量,尤以低频段能量最高。 可见,金属导爆索具有声压级高、频率范围广、混响效应强和声持续时间长的特点。Abstract: Underwaterexplosionpressuretestandgasbubblepulsationexperimentwereconductedto obtainthetransmissionandattenuationpropertiesaswellasthegasbubblepulsationpropertiesfor theunderwaterexplosionshockwavesofthemetal-claddetonatingcords.Andsomeunderwaterexplosionperformancesforthemetal- claddetonatingcordswereexploredsuchasthesoundpressure level,soundduration,reverberationeffect,andpowerspectrum.Resultsshowthatthemetal-clad detonatingcordsdisplayahighlevelofsoundpressureandsoundpower;thatthegasbubblepulsationsfollowingtheunderwaterexplosionofthemetal- claddetonatingcordsandtheensuinghugeamountofsmallbubbleswillpersistforalongtime, whichcanobservablyincreasethereverberation effectandsounddurationoftheunderwaterexplosion;andthattheunderwaterexplosionsoundofthe metal-claddetonatingcordscoversawiderangeoffrequencies,theenergyineachofwhichispowerful, andtheenergyinthelowfrequencyrangeisthehighest.
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