核爆X光辐照铝靶产生的脉冲应力波的简化解析估算

高空核爆炸大约有７０％的能量以Ｘ射线形式向外辐射，高能通量密度的Ｘ射线辐照在空间结构物上，在其表面的能量沉积将产生脉冲应力波（通常又称为热击波），这样的脉冲应力波可造成壳体材料的动力学破坏。对于试验研究人员来说希望采用简化解析模型对于其参数作出直观、快速的预测。并以简化模型估算了核爆Ｘ射线谱的特征、Ｘ光辐照铝靶产生的脉冲应力波的初始参数及其沿铝靶厚度的衰减特性。

SIMPLE ANALYTICAL ESTIMATION FOR PULSE STESS WAVES IN ALUMINIUM EXPOSED TO NUCLEAR EXPLOSION X RAYS

X ray radiation energy in an outer space nuclear explosion is about 70 percent of all the energy.Energy deposition at the surface of a structure material exposed to high fluence X rays will generate pulse stress waves(i.e.thermal shock waves)in the material.The pulse stress waves can cause dynamic damage of the structure material.In this paper,nuclear explosion X ray spectra,initial parameters of the pulse stress waves in aluminium exposed to the X rays and stress wave attenuation along the thickness are estimated by using some simple analytical models.