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Effectiveness of Power-Law Profile Indentations on Structure-Borne Noise

General Motors-Jeffrey Curtis
General Motors Technical Center India-Pranoy Sureshbabu Nair, Nilankan Karmakar, Seshagiri Rao Maddipati
Published 2019-06-05 by SAE International in United States
A study on the effect of indenting power-law shaped profiles on the flexible structures for investigating the vibration damping characteristics using computational simulation method is discussed. The simulation results are checked to see the impact of such features on the damping behavior of flexible structures responsible for radiating noise when excited with fluctuating loads. Though the conventional remedies for solving Noise and vibration issues generally involves tuning of structure stiffness or damping treatment this paper gives an insight on the idea of manipulation of elastic waves within the flexible structure itself to minimize the cross-reflections of the mechanical waves. The simulation studies mentioned in this paper not only hovers over the effectiveness of such features but also will be helpful for the engineers to look through a different perspective while solving N&V issues using simulation tools. In this paper, different studies are discussed to see the impact of such features on the damping effect of the vibrating structure comparing mobility response and far-field sound pressure response as well. Propagation of waves within the structure is…
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