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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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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
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针对战术导弹靶场试验中存在的子弹飞行故障和子弹鉴定子样不足等问题,通过分析子弹运动规律及环境诸因素对子弹飞行弹道的影响,综合考虑子弹气动外形等因素,建立了子弹飞行动力学模型.经仿真运行,得到了子弹飞行弹道,并可获取其它飞行参数,为分析子弹飞行故障、获取仿真样本和研究子弹落点散布规律提供了有效手段. 相似文献
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