HTPE推进剂机械刺激下的安全性研究

Study on Safety of HTPE Propellant under Mechanical Stimulation

为研究HTPE推进剂在机械刺激下的安全性,采用BAM撞击感度仪和摩擦感度仪测试了其临界撞击能量和临界摩擦力,参考北约STANAG 4496标准对其进行破片撞击试验,测试其在不同破片撞击速度、不同破片撞击角度下的响应等级。结果表明:该HTPE推进剂的临界撞击能量为7J,其在撞击刺激下的安全性高于常规丁羟推进剂,临界摩擦力为54N,对摩擦刺激敏感;撞击角度90°时,破片速度增大(2100~2300 m/s),HTPE推进剂响应等级均为V类(燃烧);破片速度为1850 m/s、撞击角度60°时,HTPE推进剂响应等级为Ⅲ类(爆炸);撞击角度由90°转为60°时,HTPE推进剂受到的摩擦作用增强,响应等级由燃烧转为爆炸,其破片撞击安全性下降。

In order to study the safety of HTPE propellant under mechanical stimulation,the BAM impact sensitivity instrument and the BAM friction sensitivity instrument were used to test its critical impact energy and critical friction.According to NATO STANAG 4496 standard,fragment impact tests were carried out to test its response grade under different fragment impact speeds and different fragment impact angles.The results show that the critical impact energy of HTPE propellant is 7J,and the safety of HTPE propellant under impact stimulation is higher than that of the common butylated propellant.Its critical friction is 54N,HTPE propellant is sensitive to friction stimulation.When the impact angle is 90°,as the fragment velocity increasing from 2100m/s to 2300m/s,both of which response grade are classified as class V(combustion).When the fragment velocity is 1850m/s and the impact angle is 60°,the HTPE propellant response grade is classⅢ(explosion).When the impact angle changes from 90°to 60°,the HTPE propellant is subjected to the increased friction,the response grade changes from combustion to the explosion,and the fragment impact safety of the HTPE propellant decreases.