民机典型前缘结构抗鸟撞分析研究

为保障飞行安全,CCAR25 部对民机结构抗鸟撞性能提出了严格的指令性要求,须对机翼前缘、平尾前缘和垂尾前缘等典型前缘结构进行鸟撞分析。鸟撞分析涉及到结构的动力学分析、鸟体的本构关系模拟、材料的高速非线性效应以及结构大变形等多方面因素的影响,相关的计算复杂,会耗费结构设计人员大量的精力和时间。通过采用经验公式和仿真分析方法对前缘结构抗鸟撞性能进行快速的分析,可达到对结构的抗鸟撞能力进行快速预估并从而指导设计的目的。

Study of Bird Impact Resistance for Typical Civil Aircraft Leading Edge Structure

For flying safety, leading edge structures include wing leading edge horizontal leading edge and vertical leading edge, which are very typical structures in civil aircraft. Bird impact analysis has relations with the structure dynamic analysis the physical model of bird the high speed non-linear influences of material and the structure large displacements. It will cost many energies and much time to accurately analyze bird impact resistance's properties of the structure, and will reduce the work efficiency. In the paper, experienced formula and simulation to quickly analyze the bird impact resistance of the aircraft leading edge is employed, then according to the analysis estimates the structure's bird impact resistance, finally depending on the estimation we can quickly revise the design to achieve the aim at the analysis guiding design.