Strategic distribution of resonators' parameters for broadband vibration mitigation.

Autor: Alves Pires, Felipe, Fabien Boukadia, Régis, Deckers, Elke, Desmet, Wim, Claeys, Claus
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Zdroj: INTER-NOISE & NOISE-CON Congress & Conference Proceedings; 2023, Vol. 265 Issue 3, p559-570, 12p
Abstrakt: Locally resonant metamaterials have recently come to the fore as novel lightweight and compact Noise, Vibration and Harshness (NVH) solutions. They have the potential to create stop bands i.e. frequency regions with superior noise and vibration performance. Nonetheless, these stop bands are typically only effective within a limited frequency region. In order to broaden the frequency range of noise and vibration reduction, an optimization procedure could be applied to obtain the ideal distribution of resonance frequencies and masses to achieve a minimal noise radiation over a frequency range. However, this approach typically requires a considerable computational time. Thus, this paper proposes a set of guidelines that define a strategy to determine resonance frequencies and resonant masses in view of widening the NVH reduction without the use of optimization for systems under point force excitation. The proposed strategy is applied to a finite plate with an a priori determined grid for the resonator positions. The performance of the strategy is numerically analyzed by assessing the plate's vibration response for multiple excitation locations and within different frequency ranges containing several modes. The obtained responses are then compared to the plate's response with an optimized grid of resonators. The study shows that the proposed strategy leads to a reasonable vibration reduction with similar levels with respect to an optimized response. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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