The overall efficiency and performance of commercial airliners must increase to reduce their environmental impact. One approach is to enhance the aerodynamic performance of current aircraft designs using high-aspect-ratio (HAR) wings. However, the increase in aerodynamic performance gained by HAR wings is often offset by significant increases in the amplitudes of vibration that the wing experiences during flight. This research proposes a broadband vibration mitigation strategy for HAR wings by manipulating nonlinear absorbers to dissipate energy at multiple frequencies. Unlike traditional wings, HAR wings exhibit significant motion in both transverse and longitudinal directions. In this research, a model HAR wing is studied computationally using a linear finite element model without any absorbers. Based on the linear vibrational behavior, a reduced-order model (ROM) is constructed using discrete oscillators to reproduce the first two transverse and first two longitudinal bending modes of the wing. A comparable experimental model is constructed for the ROM and is used to develop a nonlinear energy sink capable of mitigating vibrations in both transverse and longitudinal directions simultaneously. Based on the experimental study, a comparable NES is proposed for the HAR wing and is studied computationally.


Strong Vibration Mitigation in High-Aspect-Ratio Wings Using a Nonlinear Energy Sink With Elliptic Clearance

Division / Sponsors: 
Design Engineering Division and Computers & Information In Engineering Division


Paper Proceedings: https://asmedigitalcollection.asme.org/IDETC-CIE/IDETC-CIE2020/volume/83907

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