Impact Damage of Aero Engine after UAV Ingestion

Abstract

With the popularization of UAV in the dramatic domain, the accidents and incidents of UAV threatening civil aircraft has often occurred. The study of the UAV impacting on the critical parts of aircraft has become a new issue in aviation safety. In the paper, a numerical model of a high-speed UAV impact on the blade are established based on the classical Lagrange method in the non-linear dynamic program. Under different impact velocities and blade rotating speeds, impacting the root, central and tip of the fan blade respectively are analyzed in detail, together with the impact point displacement and the system internal energy, strain energy and kinetic energy time history of 18 kinds of working conditions. The dynamic response of UAV casings and the lithium battery impact on fan blades were analyzed respectively in same conditions. The results show that the influence of rotating speed of UAV impact on blade is greater than the impact velocity. The deformation of the blade tip is the largest, followed by the blade center and then the blade root.