新型数字激光动光弹性实验技术在爆炸力学中的应用

Dynamic Photoelasticity Method Combined with Laser and Digital Ultra High-speed Camera and Its Applications in Blasting Mechanics

用泵浦激光器和高速数码相机(Fastcam-SA5)分别取代传统的多火花式点光源和多幅式胶片相机,将高速数码相机和激光光源组成的高速摄影系统与动光弹性实验方法相结合,建立了新型数字激光动光弹性实验系统。应用该系统进行了爆炸载荷下的动光弹性实验研究,实验显示,与传统动光弹性实验系统相比,新型数字激光动光弹性实验系统具有记录时间长、采集频率高、实验结果可靠、操作方便、便于实现自动化分析处理等特点。研究结果表明,这一新型数字激光动光弹性实验技术是研究爆炸力学的有效工具。

Combined with pump laser and high-speed digital camera, a new dynamic photoelasticity method is developed, in which the traditional Cranz-Scharding camera is replaced by a new photography system. The new dynamic photoelasticity method was applied in the blasting mechanics, and some digital images, which were much clearer, are got. Compared with the traditional dynamic photoelasticity system, the new digital laser dynamic photoelasticity experimental system possesses longer recording time, higher sampling frequency; the results are much more reliable and easy to be processed automatically. It is shown that the new dynamic photoelasticity is useful in the field of blasting mechanics.