鸟撞载荷下铆接对机翼前缘加强结构的影响分析

Impact analysis of rivet connection towards aircraft wing leading edge reinforced structure under bird-strike load

为了提升飞机机翼前缘结构抵抗冲击的能力从而保护机翼内部结构及功能,工程中提出了各种前缘结构加强方案。而这些加强结构多为非整体结构件,需将加强结构与原结构组装起来,考虑到工艺性要求铆钉连接成为最主要的连接方式。虽然铆钉连接的方式操作简单费用较低,但该种连接方式不可避免地给飞机机翼前缘加强结构带来了一定的初始损伤,直接影响到了飞机机翼前缘结构的抗冲击能力,因而未考虑铆钉连接影响的加强结构模型,无法准确地反映结构在冲击载荷下的实际受载情况。创建了含铆钉的飞机机翼前缘加强结构模型,该模型建立了铆钉孔同时确定了被连接件间的连接方式,通过与试验结果的对比验证了该模型的有效性,含铆钉的飞机机翼前缘加强结构模型能较好地预测前缘结构遭受鸟撞冲击载荷下的损伤情况。

There are some methods to reinforce the aircraft wing leading edge structure to enhance the structure’s impact resistance ability and save the inner equipment of the wing. Most of these leading edge reinforcement structures are not integral structures, considering the manufacture requirements riveting is the widely used connection type to joint these enhancement parts. Although the riveting connection method has simple operation and low cost, it inevitably brings some initial damage to leading edge structure, which directly effects the impact resistance ability of the structure. Therefore, the reinforced structure model without considering the influence of rivet connection can not reflect the actual load of the structure under impact load. The article establishes an aircraft wing leading edge reinforced structure model with rivets. The model establishes the rivet-holes and determines the connection mode between the connected parts.The effectiveness of the model was verified by the test results, as that the aircraft wing leading edge reinforced structure model with rivets can calculate the damage of the leading edge structure under bird impact load.