Analysis and Simulation of Landing Gear's Falling Vibration Based on Finite Element Flexible Body Theory
The landing gear of a certain aircraft is used as the research object to study the dynamics of the earthquake.According to the structural characteristics of the front landing gear,the multi-body dynamics modeling technology is used to establish a multi-flexible body dynamics(MFBD)model of the front landing gear,and the simulation analysis of the landing gear and the nonlinear contact research are performed.The model was verified using the drop test data.The simulation results are in good agreement with the test data.By analyzing the deformation of the shock absorber parts,the multi-flexible body dynamic model considering the contact factors can more realistically reflect the actual situation,and perform the shock simulation at the maxi-mum landing speed.At the same time,the strength check of the key parts of the landing gear and the shock absorber The internal parts are subjected to non-linear contact calculation to obtain the vertical force and friction force of the lower cam and the bottom bracket of different materials.Data that are difficult to measure in physical tests are obtained.The analysis results are of great sig-nificance to the design of the landing gear.
Landing GearFalling VibrationFinite Element Flexible BodyContact AnalysisMulti-Flexible Body Dynamics
NETL
NSTL
万方数据
