Effect of preloaded state slat structure on the stress–strain state of simulation bird strike

In accordance with aviation regulations, the aircraft must be designed in such a way that it is possible to continue safe flight and landing after a collision between a bird and aircraft. As a validation task, various methods of modeling a mathematical model of a bird were studied. One of the tasks in this paper if the obtained results of modeling bird strike in a plate were compared with the experimental data. One of the stages is the study of the three methods of fluid modeling in the literature: the use of the Euler finite element method, the Lagrange finite element method, and the smoothed particle hydrodynamics method. The object of this paper is to analyze various methods for modeling a bird strike at low speed on slat and the justification of the correct methodology for modeling the bird strike. As a result of the paper, the effect of the preloaded state of the airframe structure on bird strike was determined and a method for modeling the impact of a bird with an aircraft slat under the action of aerodynamic loads was presented.