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

吴昊; 方秦; 龚自明

doi:10.11883/1001-1455(2012)06-0573-08

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

doi: 10.11883/1001-1455(2012)06-0573-08

1.
中国工程物理研究院总体工程研究所,四川绵阳621900;
2.
解放军理工大学国防工程学院,江苏南京210007

基金项目:

国家自然科学基金创新研究群体科学基金项目(51021001)

国家自然科学基金项目(51008304,51178461)

中国博士后科学基金项目(2012M521714)

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出版历程
- 刊出日期: 2012-11-25

Semi-theoreticalanalysesforpenetrationdepthofrigidprojectiles withdifferentnosegeometriesintoconcrete(rock)target

1.
InstituteofStructuralMechanics,ChinaAcademyofEngineeringPhysics,
2.
Mianyang621900,Sichuan,China;

Funds:

NationalNaturalScienceFoundationofChina(51021001,51008304,51178461)

More Information

Corresponding author: WU Hao

摘要

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。
- 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
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.
- mechanicsofexplosion|penetrationdepth|dynamicsphericalcavity-expansiontheory| concrete /
- rock|impactfactor|kineticenergyprojectil /