In this study, the aerodynamic forces acting on a cantilever beam are studied. At each cross sec-tion of the beam, they are determined by examining the plane motion of air caused by harmonic vibrations of a thin rigid plate assuming locally planar behavior and neglecting three-dimensional effects. There are certain difficulties in the direct experimental assignment of aerodynamic damping component because of the presence of structural and internal damping contributing to the overall logarithmic decrement. Thus, duralumin is chosen to be the plate material, since for this material, the structural and internal damping components do not depend on the vibration amplitudes. So, the logarithmic decrement of duralumin plates completely determined by the aerodynamic component. This allowed to allocate aerodynamic damping component from the measured logarithmic decrement and restore from it the aerodynamic drag of plate.
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