固定翼飞机外挂物着陆冲击响应谱研究  

Research on shock response spectrum for fixed-wing aircraft landing with external store

作　　者：雷晓波[1] 张强[1] 张永峰[1] 

机构地区：[1]中国飞行试验研究院发动机所,陕西西安710089

出　　处：《飞行力学》2015年第2期161-164,共4页Flight Dynamics

摘　　要：基于冲击响应谱理论,对固定翼飞机着陆时刻外挂构型冲击信号进行了分析,得到了着陆状态冲击振动的特性;利用均值和方差概念,建立了冲击响应谱评估公式,得到了适用于冲击试验和结构动力学设计的冲击响应谱包络曲线。分析结果表明:不同着陆姿态所对应的冲击响应谱曲线走势基本一致,但不同姿态所对应的冲击谱放大系数差异较大;同一构件的不同位置冲击响应曲线走势相差很大,不具有相似性。该结论为外挂构型的冲击试验和外挂构型内部设备的减振防冲击设计提供了重要依据。Based on shock response spectrum（ SRS） theory,research on shock signal of external pod during the landing of fixed-wing aircraft were conducted,and the characteristics of landing shock signal was obtained; Evaluation formula of SRS was established by the concept of mean and variance,and according to the formula shock response spectrum envelope curve was plotted based on this formula which was quite suitable to shock tests and structure dynamic design. The analysis results show： SRS curves of different landings have basically the same trend,on the other hand,amplification factors have a big difference. For different position of the same component,SRS curves vary widely and have no similarity. It provides important basis for shock test of the external store and vibration reduction and shock absorption design of inner equipment.

关 键 词：固定翼飞机外挂物 着陆冲击 冲击响应谱 减振防冲击 

分 类 号：V217.32[航空宇航科学与技术—航空宇航推进理论与工程]