侵彻混凝土弹体磨蚀的若干研究进展

A Review on the Mass Loss of Projectile

在侵彻混凝土和岩石加固与防护的深埋目标的过程中,弹体需保证尽可能小的变形以保持结构完整性,其理论模型常假设为刚性体;而真实弹体随侵彻速度增加,质量损失和局部侵蚀(简称磨蚀)造成的损失不断加剧,故不再能看作刚性体。弹体磨蚀过程会显著影响弹体侵彻性能,导致弹体破坏或失效,故磨蚀研究十分必要。从实验研究、经验及理论模型分析和数值模拟角度,总结了弹体侵彻粘结基靶体(混凝土或岩石)时,磨蚀的相关研究成果,并提出了对未来研究方向的建议。

The underground targets are usually protected by reinforced concrete and rocks.When they are attacked by projectile,the structure of projectile should keep integral,therefore,an assumption of non-deformable projectile is usually employed in the analysis of terminal ballistics.However,with the impact velocity increasing,the mass loss of projectile becomes unavoidable and it is not proper to treat it as rigid any more.The mass loss of projectile may induce the instability of terminal ballistics of penetrator,and lead to its damage or structural failure.Therefore,it is necessary to study the mechanism of mass loss of projectile.Abrasion and local erosion are supposed as the main reasons of mass loss.A review on mass loss of penetrator,including experimental results,empirical and theoretical analyses and numerical simulations,is presented as it penetrating into cementitious target（concrete,rock,etc.）.Finally,some research proposals are given for the further study.