Abstract

In general, results from the birdstrike tests are employed so that they can be used to validate numerical models and promote the use of numerical tools in aircraft design and the certification process. In this research, firstly, via three existing experiments, the numerical models of birdstrikes are verified, and the simulated methods and parameters are chosen, such as the bird EOS’ selection. And then, the finite element model of the honeycomb sandwich structure of the leading edge is established. Through the different impact speed, we examine the energy absorption of honeycomb sandwich materials, as well as their failure. This paper also discusses how the strengthened beam may avoid the breakdown. Bird impact resistant design provides guidance for the future. The rules and experiences of some bird-strike scenarios are summarized in the end, leading to improved design efficiency and safety, while significantly reducing certification costs.

摘要

一般来说，鸟击试验的结果可用于验证数值模型并促进数值工具在飞机设计和认证过程中的使用。本研究首先通过现有的三个实验验证了鸟类撞击的数值模型，并选择了模拟方法和参数，如鸟类EOS的选择。然后，建立了前缘蜂窝夹层结构的有限元模型。通过不同的冲击速度，我们考察了蜂窝夹层材料的能量吸收，以及它们的失效。本文还讨论了加强梁如何避免击穿。防鸟撞设计为未来提供指导。最后总结了一些鸟击场景的规律和经验，