Investigation of Medium Caliber Multi-environment Bullets Injury Effect
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摘要: 为探究跨介质枪弹致伤威力,选用明胶为人体模拟靶标,借助LS-DYNA软件对设计的7.62mm多环境枪弹侵彻模拟靶标过程进行了数值模拟,分析了弹头运动规律和靶标空腔变化特性,通过3自由度刚体运动模型,获得了弹头运动理论曲线。采用多参数同步测量技术,开展了枪弹侵彻靶标实验。结果表明,数值模拟与实验现象一致,较好再现了多环境枪弹侵彻靶标过程和致伤效果。理论模型与实验结果误差小,能准确预测枪弹在靶标中的运动规律。空化槽结构提高了枪弹跨介质运动稳定性,相较传统的56式7.62mm普通弹在靶标中稳定飞行时间长、距离远、速度衰减慢,翻滚阶段出靶角度小,最大空腔、永久空腔和能量传递效率基本一致,具有一定的杀伤效果。研究成果可充实枪弹设计理论,为新型轻武器弹药优化设计提供数据支撑。
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关键词:
Abstract: To investigate the wound effectiveness of cross-medium bullets, gelatin was chosen as a simulated human target. The numerical simulation of the penetration process of the designed 7.62mm multi-environment bullet into the simulated target was conducted using LS-DYNA software. The motion of the bullet and the changes in the target cavity were analyzed. By utilizing a three-degree-of-freedom rigid body motion model, the theoretical variations of bullet motion were obtained. Simultaneously, the penetration experiment was carried out using multi-parameter synchronous measurement techniques. The results showed that the numerical simulation matched well with the experimental observations, effectively reproducing the penetration process and the wound effects of the multi-environment bullet. The theoretical model exhibited small errors compared to the experimental results and accurately predicted the motion characteristics of the bullet in the target. By employing a cavity structure, the stability of the bullet's motion across different media was improved. Compared to the traditional 56-type 7.62mm rifle bullet, the designed bullet demonstrated longer stable flight time, greater distance, slower velocity decay, smaller deflection angle during tumbling phase, and comparable maximum cavity, permanent cavity, and energy transfer efficiency. It also exhibited a certain killing effect on the target. The research findings enrich the design theory of bullets and provide data support for the optimization design of new lightweight ammunition.-
Key words:
- multi-environment /
- bullet /
- injury effect /
- gelatin /
- cavity
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