Dynamic response and safety assessment of cabin door under the tire burst based on CFD method

This paper aims to study the dynamic response and safety of landing gear cabin door under the aircraft tire bursting pressure. In order to obtain accurate airflow field distribution in the cabin, a jet pressure model based on Computational Fluid Dynamics (CFD) method is constructed. The accuracy and reliability of the model are verified by comparing the pressure distribution experiment data of the plate with the simulation of the model. Considering the damage of different break directions, the differences in the flow field distribution between Model 1 (break towards keel beam) and Model 2 (break towards panel) are discussed, and the bearing capacity and safety of the cabin door are analyzed. According to the analysis results, it is found that model 1 leads to local failure of the cabin door, and the damage degree of model 2 is much greater than that of model 1. The large area failure of the cabin door structure occurs, and the failure types are fiber failure and matrix tension failure. The experiment results show the reliability of the simulation and further demonstrate that the cabin door was dislodged in the model 2.