Tailboom vibration due to excitation from the rotors, separated flow behind the rotor hub, vehicle maneuvers, and wind gusts causes driveline component wear, structural fatigue, and passenger discomfort. Fluidic flexible matrix composite (F2MC) tubes are a new class of lightweight and compact passive fluidic vibration treatments. A novel tailboom vibration absorber comprising two pairs of F2MC tubes mounted to the top and bottom of the tailboom and interconnected via a fluidic circuit is proposed. A model of a representative tailboom test structure with a F2MC-based vibration absorber is developed. Design considerations and trade-offs are discussed. Simulations demonstrate that the tuned vibration absorber reduces response amplitude at the first vertical bending mode by over 73% and that a partially closed orifice in the inertia track produces a damped absorber that adds nearly 11% damping to the first mode.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Aerospace Engineering
- Mechanics of Materials
- Mechanical Engineering