Analytical Dynamic Responses Of Aeroplane In Landing And Taxiing

Landing and taxiing is one of the motion state for the aeroplane, when the aeroplane does that onthe rough airport, the runway causes impact and vibration for the aeroplane landing gears. These willbe delivered to the airframe, and vibration response will also be incited. This paper studied on thisprocess, and calculated the dynamic response of the aeroplane structure, which provided a referencefor the aeroplane strength design, with important engineering and realistic significance.In this paper, through the analysis of physical model of the landing gears, nose landing gear andmain landing gear assembly model was established by ADAMS. Shock simulation was done, and theresults were compared with the experimental results to verify the legitimacy and veracity. Whenlanding and taxiing, the initial body angle of attack and horizontal speed are great, so the aerodynamicforce can’t be ignored. It was added to the aeroplane body template by innovative consideration ofchanges of aeroplane taxiing rate and the aerodynamic force, so exact aerodynamic and landing gears’force were gained, which provided a reliable set of external input for finite element calculation. Thebody subsystem was completed, then full aeroplane symmetrical landing and taxiing simulations weredone. To reduce the size of the calculation, reasonable constrains were set by Patran, half-body finiteelement aeroplane model was established, and modal analysis was carried out. Finally, the externalloads were added to the half-body model, Nastran was used to calculate the dynamic response, and thepeak load response of each airframe station was extracted to make dynamic response envelope.Dynamic response envelope can be used to determine the maximum load of the components, andpredict local hazard area of the structure. That provides a reference for structural strength design.