弹体侵彻硬目标结构响应机理及过载测试研究

The study of dynamic process of kinetic energy projectiles penetrating into the target body and the structural response during the impacting process has been the advanced research subjects in the fields of detonation physics, weapons physics and engineering physics. How to extract the identifiable environmental or target features accurately and objectively from the acceleration signal generated during the penetration process are the key and difficult problems to the study. The project taking the structural response of target body in the process impacted by kinetic energy projectiles as the research objects, and analyze the mechanism of structural response. The main object of the study includes:(1)Build the projectile hard target penetration resistance model based on cavity expansion theory,;Through the light gas gun penetration experiments to verify the reliability of the model and correct the empirical parameters.(2)Composition and mechanism analysis of the penetration overload；(3) Reveal the component parts of the acceleration signal as well as the frequency where energy concentrates on by studying the penetration resistance models, structural response and the response coming from accelerometer.(4) Build the correlation matching models based on the research of real-time identification correlation matching algorithm; Analysis the characteristic of the structural response signal during the impacting process of kinetic energy projectiles penetrating into concrete target. The project is the fundamental research of the high speed collision dynamics，and has important implication on deep understanding the mechanical phenomena and the signal characteristics during the penetration process.

弹体硬目标侵彻的动态过程和结构响应一直是爆轰物理、武器物理和工程物理领域的前沿研究课题。从侵彻过载信号中准确、客观地提取可识别的环境信息或目标特性是研究弹体侵彻靶体动态响应研究的关键，也是研究的难点。本项目开展动能体侵彻靶体的结构响应研究。研究内容包括：（1）基于空腔膨胀理论建立弹体硬目标侵彻阻力模型，并通过轻气炮侵彻实验，对模型的可靠性进行校验，对其中部分经验参数进行修正。（2）侵彻过载信号的组成机理分析，对各频率所表征的物理意义进行解释。（3）从结构响应的发生机理分析出发，研究侵彻阻力模型、结构体响应以及加速度计响应特征。（4）开展动能体侵彻信号实时识别算法研究，建立非平稳随机信号处理匹配相关运算模型，分析侵彻中动能体结构响应的基本特点。项目是有关高速碰撞结构响应的基础性研究，对武器系统科学具有重要指导意义。

动能体侵彻靶体的动态过程和结构响应一直是爆轰物理、武器物理和工程物理领域的前沿研究课题。从侵彻加速度信号中准确、客观地提取可识别的环境信息或目标特性是研究动能体侵彻靶体动态响应研究的关键，也是研究的难点。本项目开展动能体侵彻靶体的结构响应研究。研究内容包括：（1）从结构响应的发生机理分析出发，研究侵彻阻力模型、结构体响应以及加速度计响应特征，揭示加速度信号的各个组成成分及能量集中频率；（2）开展模态混叠现象的处理技术分析研究，建立先进的侵彻加速度信号处理方法，分析激发信号频率的形成机理；（3）开展动能体侵彻信号实时识别算法研究，建立非平稳随机信号处理匹配相关运算模型，分析侵彻中动能体结构响应的基本特点。项目是有关高速碰撞结构响应的基础性研究，对深刻理解动能体侵彻过程中的力学现象和信号表征具有重要的意义。