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IssuesArchive of Issues2022-4pp.792-803

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Yu.D. Selyutskiy, "Dynamics of Aerodynamic Pendulum with Elasticly Fixed Suspension Point," Mech. Solids. 57 (4), 792-803 (2022)
Year 2022 Volume 57 Number 4 Pages 792-803
DOI 10.3103/S0025654422040173
Title Dynamics of Aerodynamic Pendulum with Elasticly Fixed Suspension Point
Author(s) Yu.D. Selyutskiy (Institute of Mechanics, Lomonosov Moscow State University, Moscow, 119192 Russia, seliutski@imec.msu.ru)
Abstract The dynamics of an aerodynamic pendulum with an elastically fixed suspension point is considered. The stability of the equilibrium position "along the flow" is studied. In particular, conditions for the parameters under which an increase in the flow velocity leads to the stabilization of this equilibrium are found. In addition, it is shown that, under certain conditions, the character of stability changes three times when the damping coefficient of the helical spring installed at the suspension point changes from zero to infinity. Approximation formulas for the cycles existing in the system under the assumption that their amplitudes are small are obtained. Numerical simulation of the system dynamics has been carried out. Estimates for the coefficient characterizing the efficiency of the flow power conversion using considered pendulum are given. A nonmonotonic dependence of this coefficient on the distance between the center of mass of the pendulum and the suspension point, as well as on the flow velocity, is demonstrated.
Keywords vibrations, stability, cycle, aeroelasticity, aerodynamic pendulum
Received 09 September 2021Revised 09 November 2021Accepted 13 December 2021
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