长杆弹超高速侵彻混凝土类靶体机理

For further development of hypervelocity penetration and protection structure, the mechanism of concrete targets penetrated by long rod projectile at hypervelocity has become the key problem which is urgent to be solved. As the research on performance and constitutive relationship of concrete under dynamic Load is not deep enough, so the penetration state, hypervelocity impact mechanics model, depth of penetration and shock effects in hypervelocity penetration of concrete will be studied by combination of experiments, theoretical research and numerical simulation in this project. A breakthrough in the basic theory of some key scientific problems, such as efficient simulation method adapt to the hypervelocity penetration, methods of determining the penetration state, hypervelocity impact mechanics, as well as laws of penetration depth and ground shock of long rod projectile penetration, will be achieved. Shape changes will be taken into consideration in theoretical models of hypervelocity impact mechanics while model of ground shock will be established. Also, the influencing factors will be discussed. The numerical simulation technique for the hypervelocity impact mechanics of finite concrete targets by long rod projectile will be developed and used for failure analysis and characterizations of penetrators and targets. Furthermore, the depth of penetration versus velocity curves will be obtained from hypervelocity impact experiments, based on which both the theoretical model and simulation method will be revised and optimized. Finally, hypervelocity impact mechanics will be investigated and discussed. Research achievements of this project can provide theoretical basis and technical reserve for the application and design in the field of hypervelocity penetration damage and protection technology.

基于超高速侵彻和防护结构的发展需要，长杆弹超高速侵彻混凝土类靶体机理已经成为急需解决的关键问题。本项目通过实验、理论和数值仿真相结合的方法，开展典型弹靶条件长杆弹超高速侵彻混凝土类靶体侵彻状态、侵彻动力学模型、侵深变化规律和超高速撞击地冲击效应的研究，确定长杆弹超高速侵彻混凝土靶体的侵彻状态，建立混凝土超高速侵彻理论模型和侵深极值计算方法，掌握高速侵彻地冲击效应作用规律。结合典型长杆弹超高速侵彻混凝土靶实验研究，获取侵彻深度-速度关系曲线，确定侵深极值及影响规律；以此为基础修正理论模型和数值模拟方法，探讨长杆弹超高速侵彻机理。本项目对促进我国超高速侵彻毁伤与防护技术的进步具有重大意义，对推动超高速动能侵彻技术的发展具有重要的意义。

随着超高速侵彻武器和防御技术的发展，长杆弹超高速侵彻混凝土类靶体机理已经成为急需解决的关键问题。项目开展了长杆弹高速侵彻混凝土靶体实验，分析了残余弹体和混凝土靶体的破坏，探讨了弹体侵彻状态转变规律及影响因素，分析了靶体阻力的变化规律，确定长杆弹超高速侵彻混凝土靶体的侵彻状态，建立混凝土超高速侵彻的不同侵彻阶段的理论模型，探讨了弹靶参数对侵彻深度的影响规律。基于侵彻试验结果分析了结合典型长杆弹超高速侵彻混凝土靶实验研究，建立了变形侵彻作用过程理论模型，结合试验数据验证了理论模型的可靠性。修正了侵蚀侵彻模型，分析了侵蚀侵彻模型在混凝土靶侵彻过程的适用性，完善了钢质长杆弹侵彻理论模型，揭示了钢质长杆弹侵彻深度随速度增加的增量逆转作用机制，阐明了弹靶参数对侵彻深度的影响机制，对推动超高速动能侵彻技术的发展具有重要的意义。