| 考虑刚性弹弹头形状的混凝土(岩石)靶体侵彻深度半理论分析 |
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| 引用本文： | 吴昊,方秦,龚自明.考虑刚性弹弹头形状的混凝土(岩石)靶体侵彻深度半理论分析[J].爆炸与冲击,2012,32(6):573-580. |
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| 作者姓名： | 吴昊 方秦 龚自明 |
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| 作者单位： | 中国工程物理研究院总体工程研究所,四川绵阳621900;解放军理工大学国防工程学院,江苏南京210007;解放军理工大学国防工程学院,江苏南京,210007 |
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| 基金项目： | 国家自然科学基金创新研究群体科学基金项目，国家自然科学基金项目，中国博士后科学基金项目 |
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| 摘 要： | 基于动力球型空腔膨胀理论和冲击成坑+钻孔区两阶段侵彻模型,以截卵形弹头弹体为例,运
用曲面积分,引入表征弹头形状和弹靶摩擦效应的量纲一系数、质量比和冲击因子,提出了综合考虑弹头形状
变化、成坑区深度、弹靶摩擦阻力的混凝土和岩石靶体的刚性弹垂直侵彻深度的计算公式。该公式在相关参
数取特殊值时,可退化为经典的侵彻深度计算公式。通过与8组不同弹头形状弹体冲击混凝土和岩石靶体的
侵彻实验数据、已有10个(半)经验公式计算结果对比,验证了本文公式的适用性。并结合实验和参数影响分
析,给出了混凝土和岩石靶体的弹靶摩擦系数和与冲击因子相关的不同弹头形状弹体成坑系数的建议值。
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| 关 键 词： | 爆炸力学 侵彻深度 动力球型空腔膨胀理论 混凝土 岩石 冲击因子 动能弹 |
Semi-theoretical analyses for penetration depth of rigid projectiles with different nose geometries into concrete (rock) targets |
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| WU Hao
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FANG Qin
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GONG Zi-ming.Semi-theoretical analyses for penetration depth of rigid projectiles with different nose geometries into concrete (rock) targets[J].Explosion and Shock Waves,2012,32(6):573-580. |
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| Authors: | WU Hao FANG Qin GONG Zi-ming |
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| Institution: | 1.InstituteofStructuralMechanics,ChinaAcademyofEngineeringPhysics,2.Mianyang621900,Sichuan,China; |
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| Abstract: | Basedonthedynamicsphericalcavity-expansiontheoryandthetwo-stagepenetrationmodel
consistingofcrateringandtunneling,adimensionlessformulawasproposedfornormalpenetration
depthofrigidprojectilesintoconcreteandrocktargetsbytakingatruncated-ogivenoseprojectileas
anexample.Intheproposedformula,thesurfaceintegrationmethodwasapplied,andthemassratio
andtheimpactfactorwereintroduced,aswellasthedimensionlesscoefficientsdenotingtheprojectile
nosegeometryandtheprojectile-targetfrictioneffect,toconsiderthevariationofprojectilenosegeometry,
crateringdepth,andtangentialresistanceonprojectiles.Andtheproposedformulacanberegressedtotheclassicpenetrationformulaeinspecialcases.
Theproposedformulawasvalidatedby
comparingthepenetrationdepthspredictedbytheproposedformulawiththosepredictedbytheexistingtenclassicempiricalandsemi-
empiricalformulaeaswellastheexperimentaldatafromeightfield
shottestsofconcreteandrocktargetshitbyprojectileswithdifferentnosegeometries.Basedonthe
testsandparametricanalyses,thecorrespondingparametervalueswererecommendedaimingtodifferentnoseprojectiles,
includingthedynamicprojectile-targetfrictionalcoefficientofconcreteand
rocktargets,aswellasthelinearcoefficientofcrateringdepthrelatedtotheimpactfactor. |
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| Keywords: | mechanicsofexplosion penetrationdepth dynamicsphericalcavity-expansiontheory concrete rock impactfactor kineticenergyprojectil |
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