Aircraft landing safety assessment has become a key technical challenge in the development of modern aviation industry. The traditional contact measurement method has problems such as sensor damage and limited measurement accuracy under high-impact environment, which makes it difficult to accurately obtain the spatial attitude and structural deformation information of the airplane at the moment of landing. The non-contact measurement technology, with its advantages of high precision and real-time, provides a new idea to solve this technical challenge. This paper proposes a non-contact measurement technology based on the aircraft landing impact test space attitude and deformation measurement and analysis method. The research adopts the modal superposition method to establish a large spreading ratio elastic aircraft dynamics model, and combines the fluid cavity unit and the viscous hyperelasticity intrinsic model to construct a three-dimensional finite element model of the aviation tire. ABAQUS software is used to simulate and analyze the impact response of tires under different landing load conditions, and to study the deformation characteristics and stress distribution law during the landing process. The results show that the tire compression rate reaches 44.86% when the landing load is 273160N, and the grounded area is 148169mm²; the impact spectrum analysis shows that the acceleration amplification coefficient reaches the maximum value of 6.2 at 507Hz; when the aircraft sink rate is 2.5m/s, the peak of the tread pressure is 13.41MPa, and the deformation amount of the tire is 0.154m. Safety analysis the results show that the aircraft can land safely under the condition of sink rate of 1.0m/s, and the peak contact force of the tire is 325460N, which does not exceed the maximum load of 379636 N. This method provides an effective measurement and analysis means for the impact test of aircraft landing, which is of great significance to improve the safety of aircraft landing.
