约束结构下激光冲击波特性实验研究

 在约束结构下用短脉冲强激光对不同形状的铝片进行了冲击对比实验,研究了约束层和表面黑色涂层的作用。进行了水约束层作用的实验，所得的应力波强度与无约束层时相比有大幅度提高，但低于理论预测值。比较实验结果发现，黑色涂层更主要的作用是防止靶表层的烧蚀破坏，而冲击过后剩余的涂层会明显地衰减传向靶中的应力波。对于实际工程应用中有重大意义的非规则平面情形下的约束机制，实验表明，在曲率半径大于400mm时平面约束结构的作用依然有效。

Property of laser-induced shockwave with confinement

The paper describes the experiment on shocking aluminum plates of different shapes with shortly-pulsed high power laser beams under confinement structure and the effect of confinement and black paint .It is found that the induced pressure is much more huge than that produced in non-confining case,though it's inferior to it's forecasted value.Within the research range,black coating plays the surface-protecting role more effectively than enhances the absorption of laser,while superfluous coating will decrease the induced pressure significantly.Convex Al plates were also shocked with the confinement of plane glass,and the plane glass's confinement is still effective as long as the plate's circumflexion radius is greater than 400mm.