Vibration Analysis of Nose Landing Gear for A Propeller Aircraft

The main problem in the landing gear dynamics of the aircraft is either shimmy or brake induced vibration or ground induced longitudinal and lateral excitation due to runway unevenness. Neither of these vibrations is catastrophic, but still causes huge discomfort to pilots and passengers. Investigations on brake vibration were required, where a study of landing gear vibration due to brake chatter and squeal during taxi and landing was performed. It is essential to analyze vibration in aircraft due to the fact that while take-off and landing a very massive force acts on the landing gear, which tends to produce kinetic energy. The vibration is imparted from the kinetic energy by the forward movement of aircraft. Vibration would lead to the gradual deterioration of aircraft structure, which in turn affects both the passengers and crew. Basic dynamic theoretical studies of landing gear by modal and frequency response analysis using FEA method points out the design considerations required to reduce the level of vibration. An attempt is made to reduce the vibration by providing stiffeners at the sensitive locations obtained using strain energy values and results were presented and compared for nose landing gear (NLG) with and without stiffeners