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The shock responses of submunition drop on various ground-mediums are modeled and investigated by numerical simulation in this paper. Submunition impacts on concrete surface, gravel ground or sand with various drop velocities, different drop angles and attack angles are calculated in a finite element program. The loads and dynamic responses of submunition are analyzed, curves of various drop velocities, drop angles and attack angles related to peak overload are calculated and law of interaction time on different ground mediums is obtained. 相似文献
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针对子母弹爆炸抛撒实验中产生的子弹绕弹轴垂直方向翻转的现象,通过理论和计算机仿真两方面的研究,以弥补对这一问题研究的空白.应用经典力学理论建立了子弹翻转运动的理论模型,并采用LS-DYNA对子弹翻转过程进行了仿真计算.采用理论模型计算得到的子弹翻转角速度与仿真结果具有非常好的一致性,说明所建立的理论模型是正确的,可以用来预测子弹爆炸抛撒时子弹翻转的角速度. 相似文献
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总体没计阶段利用数字仿真方法验证制导方案是一项重要手段也是后续半实物仿真的基础.脉冲式末制导弹道修正子弹是一种新型简控子母战斗部,它的特点是探测系统为捷联光学成像导引头,控制执行机构为安装在质心附近的一组定推力、单次使用的侧喷式微型固体脉冲发动机.针对子弹上述特点,给出利用捷联导引头测量信息得到制导信号的方法,建立捷联体制下的脉冲比例导引律.在MATLAB/Simulink环境下构建六自由度弹道仿真模型并嵌入制导方法进行验证.仿真结果表明该新型子弹可有效打击地面固定目标,仿真架构正确,控制制导方案可行. 相似文献
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子弹药抛撒散布均匀性评价是子母弹研究及工程应用中的一项重要内容。现有评价方法主要基于X2检验法,存在着检验结果对分组区间的划分敏感以及要求样本数量足够大等缺点。前者使评价结果的可信度降低,后者使其应用范围受到限制。本文在核估计的基础上,提出一种改进的X2检验法——核估计X2检验法。利用该方法对某导弹子母战斗部的子弹药抛撒散布均匀性进行评价,并与现有评价方法作对比。结果表明,该方法能克服现有评价方法的不足,且能精细地反映子弹药散布情况。 相似文献
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A kinetic model of the rigid and flexible coupling system for terminally sensitive submunition is set up with Kane's method. The parachute is considered as a flexible body, the flexible displacement is expressed with modal spread method, the position of the parachute is expressed with a hybrid coordinate method, and the kinematics of the terminally sensitive submunition is analyzed. Ten generalized coordinates relative to the attitude of the terminally sensitive submunition are chosen, and the correlative generalized active forces, the generalized inertial forces, the generalized internal forces are calculated in turn. On the base of the Kane's method, the ten degrees of freedom dynamic equations for the coupled terminally sensitive submunition are finally set up. This model can be used to expediently simulate and analyze accurately the exterior ballistic trajectory of terminally sensitive submunition, and provide the overall design of the terminally sensitive submunition with some helpful references. 相似文献