摘要:
针对不同边界条件下,炸药水下爆炸的能量输出结构,设置自由场、沉底、近水底和近水面等不同
边界条件水下爆炸实验。结果表明,炸药在距水底、水面一定距离时爆炸,边界条件对冲击波影响较小,对气
泡脉动影响较大;当炸药与水底距离小于1倍最大气泡半径处爆炸时,由于水底边界影响,不能形成完整的气
泡脉动;当炸药在距水面小于1倍最大气泡半径处爆炸时,气泡直接溢出水面,不能形成气泡脉动压力;当炸
药在距水面1~1.5倍最大气泡半径处爆炸时,部分气泡溢出水面,气泡脉动压力较自由场爆炸时小;气泡在
膨胀和收缩过程中,由于气泡不断上升,水面对气泡脉动的影响范围要大于水底。
Abstract:
Aseriesofexperimentswerecarriedouttoexploretheenergyoutputcharacteristicsofthe
explosiveinthedifferentunderwaterboundaryconditions:freefield,waterbottom,nearwaterbottomandnearwatersurface.
Theexperimentalresultsshowthatwhentheexplosiveisnearthewater
bottomandsurface,theboundaryconditionsweaklyaffecttheexplosion-inducedshockwavesand
stronglyinfluencethebubblepulsation.Whenthedistancefromtheexplosivetothewaterbottomis
lessthanthemaximumradiusofthebubbles,theunderwaterexplosionoftheexplosivefailstoform
anintegratedbubblepulsationresultedfromthewaterbottomboundary.Whenthedistancefromthe
explosivetothewatersurfaceislessthanthemaximumradiusofthebubbles,theairbubblesoverflowthewatersurfaceandfailtoformthebubblepulsationpressure.
Whenthedistancefromtheexplosivetothewatersurfaceis1-
1.5timesasgreatasthemaximumradiusofthebubbles,partialair
bubblesoverflowthewatersurfaceandthecorrespondingbubblepulsationpressureislowerthanthat
inducedbytheexplosioninthefreefield.Becauseoftheairbubblerisinginitsexpansionandcontractionprocesses,
theinfluencedrangebythewatersurfaceonthebubblepulsationislargerthatbythe
waterbottom.
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