弹体斜侵彻混凝土的倾角作用研究  

Research on oblique angle effect during oblique penetration into concrete

作　　者：孙惠香[1] 牛欢 路锋 刘绍鎏 张悦[1] SUN Huixiang;NIU Huan;LU Feng;LIU Shaoliu;ZHANG Yue(Airport Construction Engineering Department,Air Force Engineering University,Xi'an 710038,China;Xi'an Tianfeng Construction and Installation Engineering Co.,Ltd.,Xi'an 710025,China)

机构地区：[1]空军工程大学机场建筑工程系,陕西西安710038 [2]西安天风建筑安装工程有限公司,陕西西安710025

出　　处：《武汉大学学报（工学版）》2018年第12期1080-1085,共6页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目(编号:51208506)

摘　　要：为了更深刻地认识弹体对混凝土的侵彻作用,提高防护工程的防护能力,研究了侵彻倾角对侵彻效应的影响.基于应力波的传播原理,分析了在斜侵彻过程中弹体的受力,根据能量守恒定律,计算了开坑阶段的开坑深度和弹体的坑底剩余速度.以坑底剩余速度作为隧道阶段的初始速度,结合正侵彻经验公式,建立了弹体斜侵彻混凝土的侵彻深度模型.推导了弹体斜侵彻混凝土的深度计算公式,并利用ANSYS/LS-DYNA数值模拟结果与推导公式计算结果进行对比,验证了模型和公式的正确性,并通过误差分析,对公式进行了修正.In order to know the effect of the projectile penetration into concrete more profound and to enhance the protective ability of protective engineering,the effect of oblique angle on penetration effect is studied.Based on the spread theory of stress wave,the force loaded of the projectile is analyzed.According to the law of conservation of energy,the depth of the crater in cratering stage and the residual velocity in the bottom of the crater are obtained.Taking the residual velocity in the bottom of the crater as the initial velocity of tunneling stage,combining the empirical formulas of penetration without angle,the penetration depth model of oblique penetration is established.Finally,the final formula is deduced.The numerical simulation of the penetration process is made by ANSYS/LS DYNA program to prove the veracity of the theory model.In addition,the errors between theory model and numerical simulation are analyzed and the theory model is corrected.

关 键 词：弹体 斜侵彻 侵彻倾角 应力波 经验公式 数值模拟 

分 类 号：TU933[建筑科学—结构工程]