缩比模型弹侵彻岩石靶尺寸效应试验研究与理论分析  

Experimental Study and Theoretical Analysis of the Size Effect for Scale Model Projectile Penetrating into Rock Target

作　　者：高飞[1] 邓树新[1] 张国凯[1] 纪玉国 刘晨康 王明洋[1,2] GAO Fei;DENG Shuxin;ZHANG Guokai;JI Yuguo;LIU Chenkang;WANG Mingyang(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;State Key Laboratory of Disaster Prevention and Mitigation of Explosive and Impact,Army Engineering University of PLA,Nanjing 210007,Jiangsu,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]陆军工程大学爆炸冲击防灾减灾国家重点实验室,江苏南京210007

出　　处：《兵工学报》2023年第12期3601-3612,共12页Acta Armamentarii

基　　金：国家自然科学基金项目(12002171、51909120)。

摘　　要：为研究弹体侵彻岩体介质尺寸效应产生的内在机理,开展两种弹形几何相似的钢质弹体对高强度花岗岩靶的侵彻效应试验。根据侵彻深度试验结果,评估常用的经验公式对于高强度岩石侵彻深度预测的适用性,发展以弹形系数和弹径系数为控制变量的侵彻深度计算方法,建立不同缩尺比下模型弹与原型弹侵彻深度换算关系。研究结果表明:模型弹与原型弹的比例侵彻深度存在弹体口径放大效应,该效应系数不仅与缩比系数有关,也与原型弹直径以及靶体材料参数有关,且随着原型弹直径的增大而增大,随着缩比系数的增大而减小;建立的侵彻深度换算关系解释了采用传统模型试验方法导致模型与原型试验结果之间产生误差的原因,揭示了弹体侵彻岩石类介质中尺寸效应产生的机理。The penetration effects of geometrically similar projectiles on high-strength granite targets are tests to study the inherent mechanism of the size effect of the projectile penetrating into rock medium.According to the penetration test results,the applicability of typical empirical formulae for predicting the penetration depth of projectile into high strength rock is evaluated,a penetration depth calculation method with the shape and diameter coefficients as the control variables is developed,and the conversion relationship between the penetration depths of model projectile and prototype projectile under different scale ratios is established.The research results show that the proportional penetration depth of model projectile and the prototype projectile has the caliber effect.The effect coefficient is not only related to the scale ratios,but also related to the diameter of prototype projectile and the material parameters of target.It increases with the increase in the prototype projectile diameter,and decreases with the increase in the scale ratio.The established conversion relation of penetration depth explains the reason for the error between the model test result and the prototype test result caused by the traditional model test method,and reveals the mechanism of the size effect of projectile penetrating into rock-like materials.

关 键 词：花岗岩 模型试验 侵彻深度 尺寸效应 

分 类 号：O385[理学—流体力学]