基于正交试验的民用飞机抗爆结构参数敏感性分析  

Sensitivity analysis of anti-explosion structure parameters of civil aircraft based on orthogonal experiment

作　　者：薛小锋[1] 欧靖 林心怡 冯蕴雯[1] 杨祥 XUE Xiaofeng;OU Jing;LIN Xinyi;FENG Yunwen;YANG Xiang(School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China;Fuselage Integration Department,Shanghai Aircraft Design and Research Institute,Shanghai 201210,China)

机构地区：[1]西北工业大学航空学院,西安710072 [2]上海飞机设计研究院机体集成部,上海201210

出　　处：《航空工程进展》2024年第2期77-89,共13页Advances in Aeronautical Science and Engineering

摘　　要：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其改进设计提供参考。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。Least risk bomb location(LRBL)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 refer-ence 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 explo-sive equivalent is determined as 200 g,the significant degree of influence of each factor on the antiknock perfor-mance of the LRBL structure from large to small is as follows:explosive position,tank wall thickness,bottom cov-er 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.

关 键 词：最小风险炸弹位置 参数敏感性分析 正交试验设计 结构优化 爆炸仿真 

分 类 号：V223.5[航空宇航科学与技术—飞行器设计] V214