Ballistic gelatin is a widely used tissue simulant in terminal ballistics. To investigate the yawing motion of rifle bullets in gelatin, this paper presented a simplified 2-DOF motion model describing the translation and rotation of the bullets. Penetration experiments were conducted using rifle bullets of two different calibers. By comparing with the experimental results, the parameters in the present yawing motion model were estimated and analyzed. The present model can predict the yawing motion of the two rifle bullets in gelatin with much higher accuracy than previous models. The yawing motion of rifle bullets was discussed in detail by making comparisons between calculations of two different rifle bullets and comparisons between calculations with different initial conditions. The striking yaw angle was found to play a decisive role in the growth of the yaw angle and thus to noticeably affect the penetration depth when the bullet tumbles through 90°.

弹道明胶是终端弹道学中广泛使用的组织模拟物。为了研究明胶中步枪子弹的偏航运动，本文提出了一个简化的 2-DOF 运动模型，描述了子弹的平移和旋转。穿透实验是使用两种不同口径的步枪子弹进行的。通过与实验结果的对比，对现有偏航运动模型中的参数进行了估计和分析。本模型可以预测明胶中两颗步枪子弹的偏航运动，精度比以前的模型高得多。通过比较两种不同步枪子弹的计算和不同初始条件下的计算，详细讨论了步枪子弹的偏航运动。