项目名称: 非对称结构约束条件下炸药爆炸能量输出规律研究
项目编号: No.11202237
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 李翔宇
作者单位: 中国人民解放军国防科学技术大学
项目金额: 26万元
中文摘要: 定向战斗部通过控制破片毁伤能量的释放方式和方向,提高对目标的杀伤概率,是高效毁伤技术发展的一个重要领域。目前主要针对对称结构约束下能量释放规律开展了较多研究工作,而对非对称结构约束下的研究较少。由于定向战斗部一般在结构和起爆方式上具有非对称性,因此迫切需要研究这种非对称结构约束下炸药爆炸能量输出规律。本项目通过分析结构内部爆炸的作用特点,将炸药爆炸驱动过程分为爆轰波冲击加载和爆轰产物等熵膨胀加载两个阶段,利用爆轰波传播、爆轰产物等熵膨胀等理论,建立非对称结构约束下炸药爆炸能量输出的分析模型,得到非对称结构的能量包络线;考察起爆点数量及位置、非对称结构约束条件等因素对能量输出的影响规律;结合量纲理论对影响能量输出的关键参数进行敏感性分析,最终建立非对称结构约束条件下炸药爆炸能量输出的理论模型和设计方法,研究成果对于快速预测破片威力场,以及指导弹药设计、威力计算和效能评估具有十分重要的意义。
中文关键词: 非对称结构;内部爆炸;能量分配;破片飞散;
英文摘要: Directional warheads can improve the kill probability on the target direction by controlling the energy release mode and direction. It is an important field of high efficient damage. At present, most studies are conducted on the explosion energy output rules according to symmetric structure, but less studies on the condition of asymmetric structure. Directional warheads are asymmetric structures and asymmetric ignition modes generally, so it is an urgent need to investigate the explosion energy output rules of explosive under asymmetric structure restriction. The explosion processes of asymmetric structure restriction are investigated with theoretical analyses, numerical simulations and experiments. Based on the structure characteristic of internal explosion, the processes are divided into denotation wave loading and detonation product expansion loading. Using the theories of denotation wave propagation and detonation product expansion, an analytical model on explosion energy output rules under asymmetric structure restriction is established primarily. The energy envelope line of asymmetric structure is obtained by using the analytical model. The influencing factors on explosion energy output rules are discussed, which include ignition number and location, asymmetric structure restriction conditions and so on. T
英文关键词: asymmetric structure;internal explosion;energy distribution;fragment spray;