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为获得适用于国内填充式防护结构超高速撞击的弹道极限方程,采用多指标寻优的方法,对NASA填充式防护结构的弹道极限方程以国内实验数据为依据进行修正.结果发现:采用第1类指标(总体预测率和安全预测率)和第2类指标(预测误差平方和)联合对方程的系数进行修正,可获得预测效果更好的修正方程.通过对方程低速段和高速段的整体系数进行修正,最终获得单填充组、单一材料的双填充组以及两种材料的双填充组防护结构弹道极限方程的总体预测率分别为93.3%,90%和88.9%,而安全预测率全部高达100%,可很好满足工程的需求.可见,基于不同填充式防护结构的实验数据分别进行弹道极限方程的修正,可获得相应结构预测能力较优的方程.
In order to obtain the ballistic limit equation which is suitable for hypervelocity impact of domestic filled protective structure, the ballistic limit equation of NASA filled protective structure is modified based on the domestic experimental data by multi-index optimization method.The results show that: The correction coefficient of class index (the overall prediction rate and the safety prediction rate) and the second type of index (the sum of square of the prediction error) are used to correct the coefficients of the equation, and the correction equation with better prediction effect can be obtained.By analyzing the whole of the low- The overall prediction rate of the ballistic limit equation of the double packing group with double packing group and single packing group is 93.3%, 90% and 88.9% respectively, while the safety prediction rate is all up to 100%, can well meet the needs of the project.It can be seen that based on the experimental data of different filled protective structures, the ballistic limit equation can be modified respectively to obtain the corresponding equation with better prediction ability.