基于正交试验的民用飞机抗爆结构参数敏感性分析

最小风险炸弹位置（LRBL）结构是放置飞机上可疑爆炸物的装置，探究结构尺寸和炸药位置对其抗爆性能的影响程度可为改进设计提供参考。基于正交试验设计与数值模拟相结合的方法，以LRBL 结构各危险部位的最大应变和变形为评价指标，分别运用极差分析法和方差分析法对LRBL 结构的罐体壁厚、底盖厚度、连接凸台厚度、剪切销直径和炸药位置5 个影响因素开展参数敏感性分析。结果表明：在200 g 炸药当量的工况下，各因素对LRBL 结构的抗爆性能的影响显著程度从大到小为：炸药位置、罐体壁厚、底盖厚度、凸台厚度和剪切销直径；结合评价指标综合分析得到各个因素最优水平下的LRBL 结构设计方案。

Sensitivity Analysis of Anti-explosion Structure Parameters of Civil Aircraft based on Orthogonal Experiment

Least risk bomb location structure is a device for placing suspicious explosives on the aircraft. Exploring the influence of structure size and explosive location on its anti-explosion performance can provide a reference for improving the design. Based on the method of combining orthogonal experimental design with numerical simulation, the maximum strain and deformation of each dangerous part of LRBL structure are used as evaluation indicators. The range analysis method and variance analysis method are respectively used to carry out parameter sensitivity analysis on the five influencing factors of the tank wall thickness, bottom cover thickness, connection boss thickness, shear pin diameter and explosive position of LRBL structure. The results show that when the explosive equivalent was determined as 200g, the significant degree of influence of each factor on the antiknock performance of the LRBL structure from large to small was as follows: explosive position, tank wall thickness, bottom cover thickness, boss thickness and shear pin diameter; Based on comprehensive analysis of evaluation indicators, the LRBL structural design scheme at the optimal level of each factor is obtained. The research results have guiding significance and reference value for the application of LRBL structure in engineering practice.