一种间隙弱化爆炸零门的仿真与试验

为了提高爆炸零门的作用可靠性,利用ANSYS/LS-DYNA程序对装药尺寸为0.8 mm×0.8 mm,不同间隙厚度的传统间隙零门和间隙弱化零门进行了数值模拟和理论分析,并通过试验对仿真结果进行了验证。仿真和试验结果表明,在传统间隙零门的基础上,增加间隙厚度,并增设圆形空气隙来弱化零门间隙强度,有助于冲击波的衰减和零门间隙的打开,零门间隙厚度的可靠性窗口从0.6~0.7 mm提高为0.7~1.0 mm,明显提高了爆炸零门的作用可靠性。

Numerical Simulation and Experimental Study of Weak Gap Explosive Null Gate

In order to improve the function reliability of explosive null gate, the traditional and weak gap explosive null gate whose charge size are 0.8 mm×0.8 mm with different gap thicknesses are simulated by ANSYS/LS-DYNA software, and the simulation results are verified through experiments. The simulation results and experimental results show that an additional round air groove on the basis of traditional gap explosive null gate could contribute to shock attenuation and gap breakage. Gap window of the null gate for reliable action is increased from 0.6-0.7 mm to 0.7-1.0 mm, which improve the function reliability of gap null gate.