Abstract:

The dynamics differential equations of the airplane system with flexible fuselage are deduced based on the establishment of equivalent model. An aircraft model with flexible fuselage using virtual prototype is applied based on the mathematical models of the whole system in ADAMS/Aircraft version. A series of simulations of dynamics responses are analyzed. Simulation results show the importance of considering the influence of flexible body in the design of landing gear. Flexible fuselage is able to contribute to absorbing 6.5% energy of shock absorber and alleviating overload during landing appropriately. It plays a role in absorbing and dissipation energy. Via research and analysis of the landing gear system with flexible body, the conclusion is got that the efficiency of shock absorber depends on the low order elastic modes to a great extent. Decreasing the burdens on tires and shock absorber, and utilizing the influence of flexible fuselage prolongs the life of landing gear. It perfects the design criteria of shock absorber commonly used.

Key words: flexible , fuselage,  , landing , gear,  , equivalent , model,  , virtual , prototype,  , dynamic , response