利用多层阻抗梯度飞片产生准等熵压缩的理论解析  

Theoritical analysis of quasi-isentropic compression via flier-plate with grade wave impadence

作　　者：黄海军[1] 沈强[2] 罗国强[2] 张联盟[2] 

机构地区：[1]武汉理工大学理学院,武汉430070 [2]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《物理学报》2007年第3期1538-1542,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10574102和40604007);湖北省自然科学基金(批准号:2004ABA101)资助的课题.~~

摘　　要：基于冲击波理论对多层阻抗梯度飞片击靶过程波系的相互作用做了理论分析,计算表明在多层阻抗梯度飞片的撞击下,样品的压缩线是一组通过不同初始状态点的冲击压缩线的连线,它位于冲击压缩(hugoniot)线与等熵压缩线之间.所以通过飞片层数的设计,可获得介于冲击压缩线与等熵线之间的任意状态点,这就为以后偏冲击压缩(off_hugoniot)状态方程的实验研究提供了理论参考.实验测量的样品/窗口界面速度与理论计算的一致性支持上述结论的可靠性与准确性.The process of shock waves propagation in the target material is analyzed theoretically when hired by a flier-plate with graded wave impedance. Under the impact, the compression curve of target consists of small Hugoniot curves originating from different original states, which are located between the Hugoniot and the isentropic curves. Thus any state between Hugoniot and isentropic curves can be obtained by controlling the number of flier-plate＇ s layers. It provides a theoretical basis for experimental study of off-Hugoniot equation of state. The validity and reliability of the theoretical analysis are supported by the consistency of experimentally measured and calculated interface velocity values.

关 键 词：准等熵压缩 多层阻抗梯度飞片 理论解析 冲击压缩 

分 类 号：O414.1[理学—理论物理]