摘要:
为准确掌握截锥形弹体垂直穿透单加筋板后的打击深度,需要清楚知道弹体穿甲加筋板后的剩余
速度。截锥形弹正穿甲板架,形成与截锥面相同的凿块,面板产生花瓣形破坏,腹板受到锥面的挤压发生塑性
变形,翼板发生翻转,在此破坏模型基础上,确定板架的能量消耗方式。穿甲过程中,板架耗能主要通过凿块
的剪切变形、凿块的动能、板架的挤压塑性变形、花瓣动力功、裂缝的径向扩展和花瓣弯曲6种方式完成。从
能量角度出发,对每种耗能方式进行能量公式推导,确定在穿甲过程中靶板消耗的能量,根据能量守恒原理推
导弹体的剩余速度和弹道极限速度。将弹体剩余速度理论结果与数值模拟结果进行对比,吻合较好,验证了
理论公式的可靠性。
Abstract:
Inordertodeterminetheimpactdepthofaconicalprojectileimpactingsinglestiffenedplate
vertically,theresidualvelocityoftheprojectileafterpenetratingthestiffenedplatemustbeknown.
Theplugisformedaftertheconicalprojectilepenetratingthegrillageandthecrosssectionoftheplug
issimilartothatoftheconicalprojectile.Thepetalfailureisformedonthepanel.Bythesqueezeof
theconicalprojectile,thewebplateoccursplasticdeformationandthealarplatecausesturnover.
Basedonthefailuremodel,theenergyconsumptionmodeofthegrillagewasdetermined.Duringthe
perforationprocess,theenergyconsumptionofthegrillagewascompletedbysheardeformationofthe
plug,kineticenergyoftheplug,plasticextrudingdeformationofthegrillage,thepowerworkofthe
patels,thepropagationofradialcracksandpetalbending.Intheviewofenergy,theenergyformula
wasdeducedforeachenergydissipationmodeandtheenergyconsumedintheimpactprocesswasdetermined.
Theresidualvelocityandtheballisticlimitvelocityoftheprojectilewasdeducedbyenergy
conservationprinciple.Thecomparisonoftheresidualvelocitybetweentheanalyticalandthenumericalresultsisinexcellentagreement,
whichverifiestheaccuracyandreliabilityofthetheoreticalformula
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