针对某型破甲弹发生膛炸问题，对引起膛炸的原因进行故障树定性分析，利用ADAMS软件对该引信尾部的保险机构进行运动学仿真。得出回转体及三卡板角位移在初始速度为1 050 m/s下随时间变化的曲线，经分析发现弹丸在身管内同时具有推进运动和旋转运动，在此初速下存在回转到位有反转运动的可能，从而引起导爆、传爆机构工作不正常，导致膛炸。结果表明：该方法可被计算其他参数对其他引信保险机构可靠性的影响所借鉴，同时也为后续引信机构产品的设计改进提供依据。
Aiming at the bore burst problem of a certain type of armor-piercing projectile, the fault tree qualitative analysis of the causes of bore burst was carried out, and the kinematics simulation of the safety mechanism of the fuze tail was carried out by using ADAMS software. The curves of the angular displacement of the revolving body and the three clamping plates varying with time at the initial velocity of 1 050 m/s are obtained. It is found that the projectile has both propulsive motion and rotational motion in the barrel, and there is a possibility of reverse motion when the projectile rotates to its position at this initial velocity, which causes the abnormal operation of the detonating and detonating mechanisms and leads to the chamber explosion. The results show that the method can be used for reference to calculate the influence of other parameters on the reliability of other fuze safety mechanism, and also provide a basis for the design and improvement of subsequent fuze mechanism products.