某产品在解决引信故障时进行了膛内加速度过载测试,发现在炮口附近出现测试曲线高频阶跃现象。研制部门从发射装药、膛内运动及加速度测试等方面对产生高频阶跃现象进行了分析,对火炮身管内膛进行了检测,并从安全方面进行了模拟试验及全弹结构强度仿真分析。结果表明:该异常现象是弹丸运动到半约束期前期与火炮磕碰,造成信号干扰,引起测试峰值过大;经分析,表明该弹在极端条件下仍在计算许可范围内,产品发射时是安全的。

A product with a fuze fault experienced bore acceleration test, it was found that near the muzzle appears test high-frequency step-curve phenomenon. The development department made analysis on interior ballistic projectile design and acceleration test, laboratory simulation test and equivalent strength simulation analysis of missile structure were done in consideration of safety. The results show that: bore overload curve anomalies are not caused by interior ballistic charge structure, according to analysis, projectile collision with artillery in preliminary of semi-confinement period causes signal interference, result in higher test peak. Equivalent simulation test of test chamber and simulation analysis of structure strength and launch safety of projectile results show that the missile is still in the range of calculation under extreme conditions. It can be said when launching the product is safe.