空气动力和直接侧向力复合控制的拦截弹飞行力学及稳定回路模型

以大气层低层拦截导弹为研究对象,建立了飞行力学模型,进行了空气动力与力矩燃气动力的复合控制回路分析设计,进行了实例计算与仿真。     

铝合金-纯铝-钢复合板爆炸焊接试验及性能研究

通过设计爆炸焊接试验复合了铝合金-纯铝-钢爆炸复合板,对其界面形态、显微硬度及力学性能进行了研究。结果表明,铝合金-纯铝界面纯规则正弦波形,纯铝-钢复合板界面波形较小,铝合金-纯铝-钢复合板的界面剪切强度在75 MPa以上,爆炸复合过程中,纯铝与钢界面生成了金属间化合物,其界面处基体金属发生强烈的塑性变形。复合板变形及组织变化的结果造成复合板界面处的显微硬度最高,随着距界面距离的增加,两侧基体金属的硬度逐渐降低。     

处理好工程力学与大学物理内容衔接的问题

大学物理课和工程力学课是学院2门重要课程。分析了2课衔接存在的问题,提出优化课程内容的方法:祥解、略讲、删减、增加。     

Fragment spatial distribution of prismatic casing under internal explosive loading

Non-cylindrical casings filled with explosives have undergone rapid development in warhead design and explosion control. The fragment spatial distribution of prismatic casings is more complex than that of traditional cylindrical casings. In this study, numerical and experimental investigations into the fragment spatial distribution of a prismatic casing were conducted. A new numerical method, which adds the Lagrangian marker points to the Eulerian grid, was proposed to track the multi-material interfaces and material dynamic fractures. Physical quantity mappings between the Lagrangian marker points and Eulerian grid were achieved by their topological relationship. Thereafter, the fragment spatial distributions of the prismatic casing with different fragment sizes, fragment shapes, and casing geometries were obtained using the numerical method. Moreover, fragment spatial distribution experiments were conducted on the prismatic casing with different fragment sizes and shapes, and the experimental data were compared with the numerical results. The effects of the fragment and casing geometry on the fragment spatial distributions were determined by analyzing the numerical results and experimental data. Finally, a formula including the casing geometry parameters was fitted to predict the fragment spatial distribution of the prismatic casing under internal explosive loading.     

民用炸药生产的消防安全管理

分析了现阶段民用炸药生产的特性,提出民爆企业生产中防火、防爆的消防管理措施。根据炸药生产工序的相对稳定性,做好事故预防,加强生产中的消防安全管理。