Increasing the efficiency of the operation of the eccentric-pendulum vibration stand for testing aviation industry products

In this article, the authors present an approach that makes it possible, by making minimal changes to the design of an eccentric-pendulum vibration stand, to increase its operating efficiency. To achieve this, the non-resonant vibration system of the vibration stand was converted into a resonant one. The resonant elastic unit was located in place of the vibration isolators that were installed on the frame. The frame itself was placed on vibration isolators. This approach allowed the non-resonant vibration system to be converted into a resonant one, where the functions of one of the oscillating masses were performed by the frame. The mass of the entire structure remained practically unchanged, and the operating efficiency of the newly formed vibration system increased significantly. To confirm this, the amplitude-frequency characteristics of both vibration systems were analyzed. It was proved that the resonant vibration system operating in near-resonant conditions exhibits significantly higher working-body vibration amplitudes. It was assumed that the excitation forces acting on the oscillating masses, and therefore their oscillations, followed a harmonic law. Thus, the results presented in this article confirmed the possibility of increasing the vibration amplitudes of a non-resonant eccentric-pendulum vibration stand by converting the non-resonant vibration system into a resonant one, while requiring only minimal design changes and, consequently, minimal resources.