Shockwavefeaturesofunderwaterexplosionofexplosiveswithmetalshell
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摘要: 为了研究装药壳体厚度对水下爆炸冲击波特性的影响,对1kg柱形含铝炸药分别在厚6mm 的钢 壳或硬铝壳装药下进行了水下爆炸实验与数值模拟研究。实验结果表明,相对硬铝壳,钢壳装药的冲击波冲 量、衰减时间常数以及冲击波能都偏大,而冲击波峰值相差不大。针对不同厚度钢壳装药的数值模拟表明,随 着壳体厚度的增加,冲击波参数明显增强,当壳体厚度超过最优值时这种效应减弱;金属壳的存在导致冲击波 峰值爬升产生滞后效应;对一定质量的炸药,存在可有效提高冲击波压力峰值的最优壳厚,填装比可以作为衡 量效果的重要指标。Abstract: Experimentandnumericalsimulationwereperformedbyusing1kgcylindricalaluminized explosivecasedby6 mmthicksteelandaluminumshells,respectively.Theresultsshowthatthe steelshellcanenhancetheimpulse,shockwaveenergyanddecaytimecomparedwiththealuminum shell.Andtheinfluencesofthesteelshellthicknesswereanalyzed.Withtheincreaseofthethickness, theshockwavewereenhancedandthenweaken,andtherewasalag-effectforthepeakpressure oftheshockwave.Foragivenmassofexplosive,thereliesanoptimumshellthicknessforenhancing theshockwavepeakpressure.Fordifferentmass,themassratioofshelltoexplosiveisanimportant parameterforestimatingtheunderwaterexplosionofcasedexplosive.
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Key words:
- mechanicsofexplosion /
- shockwave /
- underwaterexplosion /
- metalshell
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