爆轰驱动下对碰区早期凸起行为的超高速光电摄影实验研究

Investigation on Early Bulge Behavior of Collision Region Driven by Detonation Waves Using Ultrahigh-Speed Framing Photography Technology

爆轰波对碰区的飞层运动是武器物理研究的热点问题,对碰区运动凸起晚期诊断结果与早期飞层的响应过程有着密切的关联。目前实验研究主要集中在分析对碰行为晚期演化结果的外在特征,而对早期飞层响应过程进行精确测量的研究则很少。选取W、Cu等性能基本已知的材料作为研究对象,采用自研的超高速光电分幅相机搭建了精密实验平台,并将其用于对碰区爆轰波对碰过程及飞层材料早期响应行为实验,获得了冲击波对碰前、后飞层表面变形的细节特征,建立了对碰区早期飞层材料表面凸起的演化图像。该结果可以为对碰区凸起运动的状态分析和数值模拟提供参考。

The movement state of a flyer driven by two head-on colliding detonation waves is an important problem in weapon physics, about which, up to now, experimental studies have mostly focused on the external characteristics of collision behavior in the later evolution period but, in spite of the strong correlation between the diagnosis results in the later period and the early response behavior o~ the collision region,relatively little has been done concerning the precise diagnosis of this behavior＇s early period. In this paper, such materials as W,Cu,etc., whose basic properties are already known, were selected as experiment samples, and a precise experimental diagnosis platform was built using our own developed high speed photoelectric camera. The platform was used to study the collision processes of shock waves and the response of the flyer. Deformation conditions of the flyer surface before and after the collision of the shock waves were obtained. Moreover, clear evolution images of the early bulge in the collision region of the flyer were also successfully achieved. It is expected that these results can serve as significant reference for state analysis and numerical simulation on bulge behaviors of the collision region.