模压可燃药筒的压缩力试验与轴压稳定性分析
Compression Experiments and Axial Buckling Stability Analysis of Molded Combustible Cartridge Cases
张满慧 1姚忠 1周宇 2张祯旖 1夏方超1
作者信息
- 1. 西北机电工程研究所,陕西 咸阳 712099
- 2. 中国人民解放军 63850 部队,吉林 白城 137001
- 折叠
摘要
为保证模压可燃药筒使用时的结构完整性,对其开展了压缩力测定与轴压稳定性分析.通过压缩试样变形明确了稳定性分析属于弹塑性屈曲问题,建立了考虑几何和材料双重非线性的轴压稳定性模型,得出的临界轴压载荷、屈曲变形与测试结果偏差为 5.9％和 2.3％.给出了等壁厚结构条件下长径比和径厚比对整筒非线性屈曲的影响规律,并采用相关性分析确定了最敏感因素是径厚比系数.再对比分析了阶梯形和锥形两类变厚度整筒的屈曲响应,表明了锥形结构可显著改善结构稳定性,厚度比为 2 时即可将临界载荷提高 27.4％,屈曲变形减小 29.2％,而装药体积仅缩减 4％,为模压可燃药筒在火炮武器系统应用及其优化设计提供了依据.
Abstract
To ensure the structural integrity of molded combustible cartridge cases in gun weapon sys-tem,axial compression experiments and buckling stability analysis were carried out.Through the com-pression deformation process of the cartridge cases sample,it can be known that the key of stability a-nalysis is to solve the elastic-plastic buckling problem.Then,axial compression stability models with consideration of the material and geometric nonlinear properties were constructed,and the relative de-viation between the critical load,the buckling deformation and the tested results was 5.9％and 2.3％.Under the condition of equal thickness structure,the nonlinear buckling law of the whole car-tridge case was presented by changing the length-radius ratio and the radius-thickness ratio,and the most sensitive factor is the radius-thickness ratio determined by the correlation analysis.Moreover,the buckling responses of the stepped and the tapered variable thickness structures were compared,which in-dicated that the taper type could obviously improve the structural stability of the whole cartridge case.When the thickness ratio is set to 2 in the taper type,the critical load increases by 27.4％and buckling deformation is reduced by 29.2％while the charge volume only decreases by 4％.The obtained results can provide a basis for the application and the optimization design of combustible cartridge cases.
关键词
可燃药筒/轴向压缩/屈曲/稳定性Key words
combustible cartridge cases/axial compression/buckling/stability analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据