Identification of Characteristics of the Force Aerodynamic Action on Oscillating Cantilevered Beams

• Published in: Fluid dynamics 2022-10, Vol.57 (5), p.608-624
• Main Authors: Nuriev, A. N., Kamalutdinov, A. M.
• Format: Article
• Language: English
• Subjects: Aerodynamic forces; Angular velocity; Bending vibration; Cantilever beams; Classical and Continuum Physics; Classical Mechanics; Damping ratio; Elastic beams; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Interaction models; Investigations; Mathematical models; Physics; Physics and Astronomy; Three dimensional motion; Two dimensional models; Vibration analysis; Vibration damping; Vibration measurement
• ISSN: 0015-4628; 1573-8507
• DOI: 10.1134/S001546282205010X

The interaction of long elastic beams with fluid in the resonance vibration regimes is investigated experimentally and numerically. Damping bending vibration of cantilevered test-samples in air is studied experimentally. The angular velocities of the free end of cantilever are recorded using a microelectromechanical gyroscope and the flows in the neighborhood of the beam induced by vibration are observed using smoke visualization. The quasi-two-dimensional mathematical model of solid–fluid interaction is constructed. The model makes it possible to estimate the force aerodynamic action to the beam based on the measured logarithmic vibration damping ratio and the relative change in the frequency. The three-dimensional motion of fluid in the neighborhood of cantilever is directly simulated numerically. The flow structure and the aerodynamic forces induced by vibration of the beam under various vibration parameters are analyzed on the base of the results of the numerical and experimental–theoretical investigations. The applicability of quasi-two-dimensional interaction model is investigated