文中基于优化理论开展了火箭弹高速侵彻等效缩比方法研究。通过量纲分析、优化拉丁超立方方法确定弹长、弹径、弹体初速度及靶标厚度为设计变量的样本空间,高精度数值计算获取设计变量关于弹体过载和持续时间的目标响应,建立快速分析模型,以响应最佳逼近为优化目标,以最小缩比为约束,模拟退火算法实现等效缩比优化模型的求解。优化结果代入侵彻模型进行参数反演,结果表明,缩比模型与原模型的过载特性具有较高的一致性。

Based on optimization theory, equivalent scaling method of high-speed penetration projectile was carried out in this paper. Four designed variables were length, radius, initial velocity of projectile and thickness of target, which were determined according to dimensional analysis and Latin Hypercube sampling optimization methods. The designed variables on acceleration and duration of projectile response were obtained through high-precision numerical simulation, the designed variables and objective response were achieved and a rapid analysis model was established, the optimization was to find out approximation to the best response, and the minimum reduction ratio was regarded as constraints, and equivalent scaled optimization was solved by simulated annealing algorithm. Parameter inversion was carried out through the penetration model with optimization results, and the results showed that there was high consistency between the acceleration characteristics of the scaling model and that of the original model.