Dynamics of Articulated Landing Gear in Tail-Down Landing Condition

摘要

Articulated landing gears have relatively lower stowage volume and provide better taxiing characteristics when compared to telescopic gears. Unlike telescopic configuration, the articulated configurations do not have the same stroke for wheel axle and shock absorber travel. The objective of this work is to study and compare the dynamics of the articulated main landing gear, during level and tail-down landing conditions, using MSC/ADAMS software. The results are compared with the available landing gear analysis program, which has been experimentally validated by the drop tests. A 12.3% reduction in total vertical wheel axle travel is observed in tail-down condition when compared to level landing, due to the kinematic configuration. It results in 18.9% and 14.8% increase in dynamic load in limit and reserve landing respectively for tail-down condition. Also, the tire deflections are relatively higher and the shock absorber travel is relatively lower, in tail-down landing for both limit and reserve conditions.