弹体高速侵彻效率的实验和量纲分析

发布时间：2018-09-14 10:30

【摘要】：为了研究高速侵彻时弹体撞击速度、材料强度等对质量侵蚀特性和侵彻效率的影响规律,开展了不同材料强度和长径比的弹体高速侵彻半无限厚素混凝土靶实验,弹体撞击速度为880~1 900m/s,弹头形状为尖卵型(半径口径比为3),口径为30mm。由实验发现:弹体撞击速度对侵彻效率的影响呈抛物线分布,最大侵彻效率时的弹体特征撞击速度约1 400m/s;高速侵彻时弹体的质量侵蚀主要发生在卵形头部,弹身及尾部损伤极少;速度超过特征撞击速度时,弹体侵蚀严重,甚至弯曲变形或解体;弹体强度提高至约2倍时,质量侵蚀率降低约80%。基于实验,利用量纲分析原则建立了量纲一侵彻效率和量纲一弹体撞击速度的函数关系式,可估算出最大侵彻效率对应的弹体撞靶速度,为高速侵彻效应模拟实验提供理论指导。
[Abstract]:In order to study the influence of impact velocity and material strength on mass erosion characteristics and penetration efficiency during high speed penetration, the experiments of high speed penetration of semi-infinite thick concrete target with different material strength and aspect ratio were carried out. The impact velocity of the projectile is 880m / s, the shape of the warhead is pointed oval (radius ratio is 3) and the caliber is 30 mm. It is found from the experiment that the effect of impact velocity on penetration efficiency is parabolic, and the characteristic impact velocity of projectile at maximum penetration efficiency is about 1 400 m / s, and mass erosion of projectile occurs mainly in the oval head during high velocity penetration. When the velocity exceeds the characteristic impact velocity, the projectile erodes seriously, even bends and deforms, and when the strength of the projectile increases to about 2 times, the mass erosion rate decreases by about 80%. Based on the experiments, a functional relationship between the dimensionality penetration efficiency and the impact velocity of a projectile is established by using the dimensionality analysis principle, and the target collision velocity corresponding to the maximum penetration efficiency can be estimated. It provides theoretical guidance for the simulation experiment of high speed penetration effect.
【作者单位】：南京理工大学智能弹药技术国防重点学科实验室;
【基金】：国家自然科学基金项目(51278250)
【分类号】：O385

【相似文献】