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The article analyses the dynamic response of a spinning module body made of an aluminium alloy, aiming to improve its damping properties under high-frequency vibrations in pre-resonance and resonance region, which are a critical factor influencing system stability and service life. Since the inherent damping capacity of the aluminium alloy body is insufficient for the operating conditions, structural modifications were proposed, including the application of a damping material into the cavities of the body (forming a hybrid metal–damping material structure) and an increase in stiffness through thicker ribbing. The system’s dynamic response was analysed using FFT analysis and Wavelet analysis, enabling evaluation of the signal in both time and frequency domains and capturing non-stationary and transient effects. The results showed that the hybrid metal–damping material structure reduces high-frequency vibration amplitudes primarily at low excitation levels (up to 5g), while its effectiveness decreases at large high-frequency amplitudes (excitation above 10g). Increasing structural stiffness through thicker ribbing led to vibration amplitude reductions of up to 50% within a certain speed range, along with slight shifts in the system’s natural frequencies. The combination of both approaches produced a significant improvement in dynamic behaviour, with the safe operating limit shifted by up to 20%. The proposed design enables effective vibration reduction even under excitation with large high-frequency amplitudes, improves frequency response characteristics, and subsequently allows operation at higher rotational speeds, thereby enhancing overall system performance under demanding conditions.
Keywords: Vibration damping, hybrid metal–damping material structure, high-frequency vibrations, structural dynamics, resonance, rotational speed© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.