钢板混凝土复合靶抗贯穿性能的理论与数值分析  

Theoretical and numerical investigation of perforation resistance of steel-concrete composite target

作　　者：程毅 刘军[1,2] 郑雨晴[1] 张远 Cheng Yi;Liu Jun;Zheng Yuqing;Zhang Yuan(Institute of Engineering Safety and DisasterPrevention,Hohai University,210098,Nanjing,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,210098,Nanjing,China)

机构地区：[1]河海大学安全与防灾工程研究所,南京210098 [2]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098

出　　处：《应用力学学报》2020年第4期1441-1449,I0005,共10页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51874118)。

摘　　要：为了给防护结构的优化设计提供参考,基于动能守恒定律,推导出了后附薄钢板复合靶的弹体剩余速度公式及弹体剩余动能和初始动能之比Er/E0。利用ANSYS/LS-DYNA对已有文献的侵彻试验进行模拟,分析了钢板布局对复合靶抗贯穿性能的影响,对比了素混凝土靶、钢筋混凝土靶和复合靶的抗贯穿性能。结果表明:由BRL&CEA-EDF转换公式得到的剩余速度预测值精度最高,其推导的Er/E0可用于评价钢板混凝土复合靶的抗贯穿性能;复合靶的抗贯穿性能随着钢板的后移而逐渐增强,其中工况0-3(靶板前后表面铜板厚度分别为0mm、3mm)较工况3-0(靶板前后表面铜板厚度分别为3mm、0mm)提高约10%;含筋率为0.8%时,复合靶的抗贯穿性能较素混凝土靶和钢筋混凝土靶分别提高约11%和4%,在靶板损伤中,复合靶能够抑制扩展裂缝的产生,后附钢板发生沿侵彻方向的凸起,并呈花瓣状开裂,但它减慢了后部弹坑的形成,提供了更大的侵彻阻力。In order to provide a reference for the optimum design of protective structures, the residual velocity formula of the composite target with a rear mild steel plate and the ratio between residual and initial kinetic energy are derived based on the conservation of kinetic energy. The penetration tests of existed documents are simulated by ANSYS/LS-DYNA to analyze steel plate layout how to affect the composite target perforation resistance and compare anti-perforation performance among a plain concrete target, a RC target and a composite target. Results show that the accuracy of the residual velocity predicted by BRL&CEA-EDF conversion formula is the highest and Er/E0 deduced by it can be applied to evaluate perforation resistance of a steel-concrete composite target. The perforation resistance of the composite target is gradually enhanced with back shift of the steel plate and 0-3 case is about 10% higher than that of 3-0 case. When the reinforcement ratio is 0.8%, the perforation resistance of a composite target is increased by 11% and 4% respectively compared with a plain concrete target and a RC target. In terms of target damage, the composite target can inhibit expanded cracks, the rear steel plate protrudes along the penetration direction and cracks like petals, but it provides greater penetration resistance by slowing the rear crater formation.

关 键 词：爆炸力学 钢板混凝土复合靶 抗贯穿性能 剩余速度 钢板布局 损伤分析 

分 类 号：TU528[建筑科学—建筑技术科学] O385[理学—流体力学]