水下爆炸条件下近药包表面能量测试技术研究

Research on the measurement technology of energy near the charge for underwater explosion

为测量水下爆炸条件下近药包表面的能量,提出基于预制飞片圆筒的水下爆炸条件下近药包表面能量测试技术。首先,采用AUTODYN软件,对水下爆炸条件下自由场和作用在飞片上的能流密度进行数值计算,通过对比两者随爆距的变化规律,对预制飞片圆筒间接获取近药包表面能量的可行性进行论证。然后,采用激光位移传感器和探针测量爆炸后的飞片速度,进而将飞片的动能除以面积计算得到作用在飞片上的能流密度。将能流密度的测试值与计算值进行对比,两者基本一致,表明采用预制飞片圆筒来测量水下爆炸条件下近药包表面的能量是可行的,同时验证飞片速度测量系统的有效性,为近药包表面载荷特性的理论研究和试验测试提供技术基础。

In order to measure the energy near the charge surface for underwater explosion, a pre-grooved cylinder was proposed to measure the energy near the charge. At first, the energy density in the free field and on the flyer were calculated with AUTODYN, the changes in energy density as distance changes were compared, which demonstrated the feasibility of energy measurement with pre-grooved cylinder. Then, the laser displacement sensor and probe were used to measure the flyer velocity. Based on the velocity, the energy density on the flyer could be calculated. Then, the measured energy density on the flyer and energy density in the free field were compared, and they were found accordant. The results prove that the pre-grooved cylinder could be used to measure the energy near the charge surface, which could provide technology support for theoretical research and experiment measurement of underwater explosion load characteristics near the charge.