Dynamic response analysis of missile-sled separation in warhead rocket sled test

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Abstract The warhead’s attitude upon hitting the target stands as a pivotal factor influencing its dynamic damage effect. This paper addresses the issue of interference posed by the sled and separation device on the warhead’s attack angle during endpoint effect rocket sled tests. Employing an impact dynamics analysis method, we simulate the dynamic response of the missile-sled separation process. Four models are devised, combining two types of rocket sled structures and two variations of arc rail devices with distinct parameters. Comparative analysis is conducted on the sled’s separation distance, the warhead’s attitude, and the sled’s stress. We optimize the rocket sled structure to ensure unhindered separation of the warhead and the sled, followed by verification tests. Analysis reveals that a small curvature radius and insufficient sled stiffness lead to structural failure. Consequently, the sled interferes with the warhead, impacting the target’s attack angle. To address this, we introduce a middle snap ring and slipper to reinforce the sled, along with an increased curvature radius. These two enhancement measures effectively resolve the separation interference issue between the sled and the projectile. The attack angle shift from −0.5° to 1.1° in two sled tests, thus fulfilling the experimental requirements.