中文摘要：

基于球形发散波实验技术及圆环型电磁粒子速度测试技术,采用0.125g TNT当量的微型炸药作为爆炸源,对填实爆炸下有机玻璃中球形波的传播规律进行了实验研究,并基于粒子速度波形进行了分析.结果表明：粒子速度峰值及粒子位移峰值符合指数衰减规律,粒子速度、位移峰值的衰减指数分别为1.34和1.28;负向粒子速度峰值随比距离的增加有先增大后减小的趋势;基于强间断假设得到的低压（小于1 GPa）下径向压力峰值-粒子速度峰值关系与一维应变下得到的σ-v Hugoniot曲线吻合较好;采用变模量模型假设,结合粒子速度数据反演的有机玻璃弹性模量E=（6.40±0.64） GPa、体积模量K=（7.12±0.71） GPa、剪切模量G=（2.37±0.24） GPa.

英文摘要：

Based on the technique of the spherical divergent stress wave experiments and the cirque electromagnetic testing method of the particle velocity,the propagation of spherical stress wave and the particle velocities in PMMA under tamped explosion were experimentally investigated by choosing a miniature spherical explosive of 0.125 g TNT equivalent as the spherical explosion source.The results reveal that the peak values of the particle velocities and displacements follow exponential attenuation laws and the corresponding attenuation indexes are 1.34 and 1.28,respectively.As the scaled distance increases,the negative peak values of the particle velocities trend to first increase and then decrease.As the radial stress is lower than 1 GPa,the relations of the radial stress peak with the particle velocity peak under the strong discontinuity assumption are consistent with the σ-v Hugoniot curves from one-dimensional strain experiments.And inverted from the variable modulus model assumption and the particle velocity curves,the elastic,bulk and shear moduli of PMMA are （6.40±0.64）,（7.12±0.71） and （2.37±0.24） GPa,respectively.