PDV法测量内部爆炸作用下沙墙外层速度  

Photonic Doppler velocimetry of outer layer of sand wall under internal explosion loading

作　　者：史国凯[1] 杨军[1] 刘文祥[1] 张敏[1] 王昭[1] 徐海斌[1] 唐仕英[1] 胡华权[1] 惠海龙[1] SHI Guokai YANG Jun LIU Wenxiang ZHANG Min WANG Zhao XU Haibin TANG Shiying HU Huaquan HUI Hailong(Northwest Institute of Nuclear Technology,Xi＇an 710024, China)

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《中国测试》2016年第10期68-71,共4页China Measurement & Test

摘　　要：为研究爆炸波与沙墙相互作用机理,采用光子多普勒速度测量技术(PDV)获得内部爆炸作用下沙墙外层速度。设计一维点对称模型的实验构型,制备系列透明的塑料壳体;先将球形装药放置于球壳中心,再将细沙装入壳体形成封闭的球壳沙墙。对4发不同比距离的沙墙进行PDV测速实验,均获得沙墙外层的速度历程。在爆炸当量最大的一发实验中,其沙墙外层的速度值在首峰约520m/s后先略有下降再继续上升,在有效时长末端达到最大约690 m/s。实验证明:在爆炸波与沙墙相互作用机理的研究中,光子多普勒速度测量技术可以发挥一定的作用。To study the interactive mechanism between blast wave and sand wall, the velocity histories of outer layer of sand wall under internal explosion loading were obtained based on photonie Doppler velocimetry （PDV）. The experimental configuration of one-dimensional point symmetry model was designed and series of transparent plastic shell were produced. Spherical charging device was placed in the center of a closed spherical shell, and the shell was filled with sand, forming a spherical shell sand wall. Four sand walls with different scaled distances were tested based on PDV diagnostics, and the velocity histories of outer layer of sand wall were obtained. In the test with biggest explosive yield, after its first peak, about 520 m/s, the velocity of outer layer of sand wall firstly decreased a little and then continued to rise to 690 m/s at most at the end of the effective duration. Therefore, during the study on the interactive mechanism between blast wave and sand wall, the PDV was proven to be useful.

关 键 词：爆炸力学 光子多普勒速度测量技术 沙墙外层速度 内部爆炸 

分 类 号：O572.25[理学—粒子物理与原子核物理]