弹着点对钢筋混凝土侵彻深度的影响  

Influences of Impact Points on the Penetration Depth of Reinforced Concrete

作　　者：黄成龙 陈叶青 李述涛 张生 王振清[1] HUANG Chenglong;CHEN Yeqing;LI Shutao;ZHANG Sheng;WANG Zhenqing(College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,P.R.China;Institute of Defense Engineering,Academy of Military Sciences,Beijing 100036,P.R.China)

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,哈尔滨150001 [2]军事科学院国防工程研究院,北京100036

出　　处：《应用数学和力学》2023年第9期1097-1111,共15页Applied Mathematics and Mechanics

基　　金：国家自然科学基金项目(11532013,11872157)。

摘　　要：在弹体侵彻钢筋混凝土研究领域,侵彻深度的离散性普遍存在于试验和经验公式中,弹着点位置的不同是造成此离散性的主要原因之一.为探究由弹着点位置造成的侵彻深度离散性并揭示其机理,参照公开发表的侵彻试验,建立了三种典型弹着点位置的有限元模型,对比分析出了三种典型弹着点位置侵彻过程差异的主要原因,依据数值计算结果归纳了表征侵彻深度离散性的表达式,提出了弹体侵彻钢筋混凝土侵彻深度是一个范围值的基本思想,并对表达式进行了初步验证.结果表明,造成侵彻深度离散性的主要因素是弹体撞击钢筋的数目和弹体接触钢筋的持续时间,此离散性随着弹径与钢筋网眼尺寸比值的增大而减小.In the research field of projectile penetration into reinforced concrete,the penetration depth dis⁃creteness generally exists in experiments and empirical formulas,and the difference of impact positions is one of the main reasons for this discreteness.To explore the penetration depth discreteness caused by the impact position difference and reveal its mechanism,the finite element models of 3 typical impact positions were estab⁃lished with reference to a published penetration test.The main reasons for the differences in the penetration processes of 3 typical impact positions were compared and analyzed.Based on the numerical calculation re⁃sults,the expression characterizing the discreteness of penetration depth was summarized.The results show that,the penetration depth of the projectile impacting reinforced concrete is a range value.The expression was preliminarily verified.The main factors causing the penetration depth discreteness are the number of rebars hit by the projectile and the duration of contact with steel bars.This discreteness decreases with the ratio of the projectile diameter to the mesh size of rebars.

关 键 词：弹着点 弹体侵彻 钢筋混凝土 侵彻深度 

分 类 号：O385[理学—流体力学]