一种测量二级轻气炮金属膜片破膜压力的方法

A Method for Measuring Rupture Pressure of MetalDiaphragm of Two-Stage Light Gas Gun

为精确测量二级轻气炮中金属膜片破裂压力,提出了将内弹道压力测量波形和金属膜片破裂过程物理图像进行时间关联的破膜压力测量思路。对原有二级轻气炮进行了改造,设计了高压段延长机构,搭建了具备光学观察窗口的实验平台。实验测得了内弹道压力并获取金属膜片破裂过程的物理图像。结果表明:在一级泵管口径为57 mm,二级发射管口径为10 mm的二级轻气炮上测试获得该型轻气炮常用规格的金属膜片破裂压力为57 MPa,测量实验与传统带弹对照实验结果吻合。该方法能够获得金属膜片承受载荷的历程和破裂准确时刻,可实现对二级轻气炮内弹道中金属膜片破裂压力的精确测量。

To accurately measure the rupture pressure of metal diaphragm in two-stage light gas gun,an idea of measuring the rupture pressure by time correlation between the internal ballistic pressure measurement waveform and the physical image of metal diaphragm rupture process is proposed.The high-pressure vessel extension mechanism is designed for the original two-stage light gas gun,and an experimental platform with optical observation window is built.The internal ballistic pressure is measured and the physical image of the rupture process of metal diaphragm is obtained.The experimental results show that the rupture pressure of the metal diaphragm is 57 MPa commonly used in this type of light gas gun,which is measured on a two-stage light gas gun with a primary air chamber diameter of 57 mm and a secondary launch tube diameter of 10 mm.The measured results are consistent with the results of the traditional control experiment with projectile.This method can obtain the load course and rupture time of the metal diaphragm,and can realize the accurate measurement of the rupture pressure of the metal diaphragm in the internal ballistics of the two-stage light gas gun.