In order to bring the composite shaped charge liner into the civil blasting proj ect from the field of ordnance,based on the characteristics of industrial products,fixed thickness ratio of aluminum-copper double-layer compound type cover that the material is cheap and easy to obtain and the production process is simple is studied.During the production,an aluminum cover (outer cover)with a lower impedance than copper is arranged between the explosive and the copper cover (inner cover)to increase the energy utilization efficiency of the explosive.Through the numerical simulation,the penetration process of the j et with different aluminum-copper thickness ratio is calculated.It is found that j et head velocity increases with the increasing of aluminum-copper thickness ratio.However,the penetration depth increases firstly and then decreases with the increasing of Al-Cu thickness ratio and the best penetration depth is obtained when the thickness ratio is 3.When aluminum and copper thickness ratio is less than 5,the change of penetration pore size is small.%为了将复合聚能罩从兵工领域引入到民用爆破工程,基于工业用火工品特点,研究了材料廉价易得、制作工艺简单的定厚度比铝铜双层复合药型罩.制作时,在炸药与铜罩(内层罩)之间配置一层阻抗低于铜的铝罩(外层罩),便能提高炸药能量利用率.通过数值模拟计算了不同铝铜厚度比射流的侵彻过程,发现射流头部速度随铝铜厚度比提升而增加,而侵彻深度随铝铜厚度比的增加呈先增后降的趋势,铝铜厚度比为3时获得最佳侵彻深度.铝铜厚度比小于5时,侵彻孔径变化较小.
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