摘要
为深入研究冻土靶体的抗侵彻特性,开展了冻土靶体抗侵彻系列模型试验,得到了不同温度下冻土靶体抗尖卵型弹体侵彻成坑效应、弹道轨迹和侵彻深度等参数。试验结果表明,冻土靶体抗侵彻特性与其温度和弹体撞击速度密切相关,冻土温度相同,弹体撞击速度越大,冻土靶体表面成坑越大,抗侵彻深度越大,弹体侵彻速度相近,冻土温度越低冻土靶体表面成坑越小,抗侵彻深度小。为准确预测冻土靶体抗卵形弹体侵彻深度,引入考虑温度效应的摩尔-库仑准则,结合空腔膨胀理论对冻土靶体抗侵彻深度进行计算分析,与试验实测数据对比,理论预测值能够较准确反映冻土靶体抗侵彻深度与冻土温度和弹体侵彻速度间的关系。
Here,to further study anti-penetration characteristics of frozen soil targets,a series of model tests for anti-penetration of frozen soil targets were conducted,and parameters of cratering effect,ballistic trajectory and penetration depth of pointed egg-shaped projectile were obtained for frozen soil targets under different temperatures.Test results showed that anti-penetration characteristics of frozen soil targets are closely related to their temperature and projectile impact velocity;under the same frozen soil temperature,the larger the projectile impact velocity,the larger the craters on frozen soil target surface,the larger the anti-penetration depth;under the closer projectile penetration velocity,the lower the frozen soil temperature,the smaller the craters on frozen soil target surface,and the smaller the anti-penetration depth.To accurately predict the anti-penetration depth of frozen soil target against oval-shaped projectile,Mohr-Coulomb criterion considering temperature effect was introduced.Combined with cavity expansion theory,the anti-penetration depth of frozen soil target was calculated and analyzed.Compared with test data,the theoretical predicted values can more correctly reflect relations among frozen soil target anti-penetration depth,frozen soil temperature and projectile penetration velocity.
作者
谭仪忠
戴伟
李杰
李干
张中威
史小敏
TAN Yizhong;DAI Wei;LI Jie;LI Gan;ZHANG Zhongwei;SHI Xiaomin(State Key Laboratory of Explosion Shock Prevention and Mitigation,Army Engineering University of PLA,Nanjing 210007,China;Training Base,Army Engineering University of PLA,Xuzhou 221004,China;College of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《振动与冲击》
北大核心
2025年第9期250-256,共7页
Journal of Vibration and Shock
基金
爆炸冲击防灾减灾全国重点实验室开放基金(LGD-SKL-202205)
国家自然科学基金项目(52478378)。
关键词
冻土
抗侵彻
工程防护
空腔膨胀理论
frozen soil
anti-penetration
engineering protection
cavity expansion theory
