MENG Xianfeng1,2, LUO Meng3,4, JIANG Hui3, DAI Peng1,2, GAO Xuekui1,2, ZHAO Xingyan3, JI Jinwen1,2
JOURNAL OF VIBRATION AND SHOCK. 2024, 43(1): 308-318.
In order to study the dynamic load characteristics of civil airport pavement during aircraft landing and taxiing, taking the Boeing 737-800 aircraft as an example, a three-dimensional numerical simulation model of the fuselage, landing gear and tires was established, based on the dynamic simulation software VI-Aircraft. The pavement simulation model was created according to the measured roughness data of an airport pavement, forming a set of simulation methods for aircraft landing impact considering aerodynamic variation characteristics. The reliability of the simulation method was verified by two methods of landing gear system drop test and aircraft ground kinematics theory analysis. In addition, the influence of various landing state parameters on the dynamic load characteristics of the pavement was systematically discussed, the quantitative value of the dynamic load coefficient of the pavement under the influence of different landing state parameters was clarified, and the influence rule and mechanism of various landing state parameters on the dynamic load response of the pavement were revealed. The results show that with the increase of landing mass, descending speed and roll angle, the dynamic load response of pavement is significantly enhanced. With the increase of heading speed, the dynamic load response of pavement decreases significantly and with the increase of pitch angle, the dynamic load response of pavement shows a trend of decreasing fluctuation. In the process of aircraft landing, the sensitivity factors of the dynamic load coefficient of the pavement from large to small are: heading speed, descending speed, landing mass, roll angle and pitch angle. In full consideration of the impact of various landing state parameters, the distribution range of the dynamic load coefficient DIM of the pavement is 1.18~1.80 in general The research results can be further extended to the analysis and research of aircraft landing on runway bridge.