摘要
为探究D形截面弹体对超高性能混凝土(UHPC)靶的侵彻机理与性能优化规律,采用质量为254g的D形截面弹体对半无限UHPC靶开展了初速度范围在596~836m/s的侵彻试验研究,并结合数值仿真探讨了横截面宽高比、头径比及长径比等参数对D形截面弹体侵彻特性的影响规律.研究结果表明,相同运载平台限制下,相对于传统圆截面弹体,D形截面弹体的侵彻深度提升了8.0%~12.6%,加速度变化更加平稳;增大长径比可显著提升D形截面弹体的侵彻能力并降低其加速度变化率;当D形横截面宽高比从1.0变化到1.2时,侵彻深度增加约6.0%~8.5%,当D形横截面宽高比介于1.2~1.8之间时,对侵彻深度的影响可忽略不计;随着头径比γ值的增加,侵彻深度仅有微小增加,增加幅度不超过5%,表明D形截面弹体的设计灵活性较高.研究结果拓展了非对称弹体的侵彻理论,可为异形战斗部应用提供技术支撑.
To investigate the penetration mechanism and performance optimization of D-shaped cross-section projectiles into ultra-high performance concrete(UHPC)targets,penetration experiments were conducted using 254 g D-shaped cross-section projectiles against semi-infinite UHPC targets with initial velocities ranging from 596~836 m/s.Numerical simulations were used to analyze the influence of parameters including cross-sectional width-height ratio,nose length-equivalent diameter ratio,and length-diameter ratio on the penetration character-istics of D-shaped projectiles.The results show that under equivalent launch platform constraints,compared with conventional circular cross-section projectiles,the D-shaped projectiles achieved 8.0%~12.6%greater penetra-tion depth with smoother acceleration changes.Increasing the length-diameter ratio could significantly enhance the penetration capability of D-shaped projectiles while reducing their acceleration variation rate.When the D-shaped cross-section width-height ratio increased from 1.0 to 1.2,the penetration depth increased by approxim-ately 6.0%~8.5%,while this parameter showed a negligible impact on penetration depth within the 1.2~1.8 range.As theγ(nose length-equivalent diameter ratio)increased,the penetration depth showed only marginal im-provement(less than 5%),indicating high design flexibility of D-shaped projectiles.These findings extend the penetration theory of asymmetric projectiles and provide technical support for the application of special-shaped warheads.
作者
张启瑞
彭永
余双洋
程浩
李翔宇
ZHANG Qirui;PENG Yong;YU Shuangyang;CHENG Hao;LI Xiangyu(College of Science,National University of Defense Technology,Changsha,Hunan 410073,China)
出处
《北京理工大学学报》
北大核心
2025年第10期1044-1052,共9页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金面上项目(12472399)。
关键词
侵彻深度
D形截面弹
超高性能混凝土
数值仿真
结构参数
penetration depth
D-shaped cross-section projectile
ultra-high performance concrete(UHPC)
nu-merical simulation
structural parameters
作者简介
张启瑞(2001—),男,硕士生,E-mail:qrzhang_nudt@163.com;通信作者:彭永(1989—),男,博士,副教授,E-mail:pengy116@163.com.
