超高速数字图像相关实验系统及其在爆炸研究中的应用

 基于数字图像相关方法和超高速摄像技术，建立了超高速数字图像相关实验系统，并应用该系统和UV平板打印制斑技术，通过在聚碳酸酯（PC）平板试件上进行爆破模型实验，分析了爆破应变场的演化过程和衰减规律。结果表明，爆炸产生应力波的表现形式以压缩波为主、剪切波为辅；随着应力波在试件平面内的传播，应力波频率由高频向低频衰减，应力波能量逐渐耗散。采用ABAQUS有限元分析软件对爆破模型实验的动态过程进行模拟，数值模拟的变形演化规律与模型实验结果基本吻合，验证了超高速数字图像相关实验系统对爆炸问题的研究具有良好的适用性。

Ultra high speed digital image correlation system and its application in blasting research

Combining with the digital image correlation method and the ultra high speed photography technology, an experimental system of ultra high speed digital image correlation is set up to realize monitoring and analysis of the ultra-dynamic strain field under blasting loading. By using the experimental system and the UV flatbed printing technology, a blasting model experiment on polycarbonate (PC) plate is conducted, the evolution of blasting strain field and the attenuation law are analysed. The results show that the compressive wave is the main form of blasting stress wave and the shear wave is the minor form. With the propagation of stress wave in the specimen plane, the stress wave decays from high frequency to low frequency, and the energy of stress wave dissipates gradually. In addition, the ABAQUS finite element analysis code is used to simulate the dynamic process of blasting. The deformation evolution of numerical simulation is in good agreement with the experimental results, it is verified that the experimental system has good applicability to blasting research.