Abstract
Poroelastic materials are wildly used as sound absorbing applications in automobile design. It plays an important role not only as absorbers in acoustical treatments but also as dampers on the structure to reduce the structure-borne noise. In this paper, single or multiple layers of poroelastic materials (felt type) are attached to the bottom plate of an acoustic box, which is designed as a simplified experimental model of the vehicle cabin. The reduction of system response amplitude at the first natural frequency is observed by the attachment of felt layers, and the additional damping and equivalent mass are evaluated by the variation of the resonant peak. A simplified finite element (FE) model of the acoustic box with felt layers is constructed in commercial FE program. Frequency response analysis is conducted, and the vibration reduction effect caused by sound absorbing materials is estimated. The simulation results are in good agreement with the experimental results.
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Hong, J., Yoshimura, T., Takeshita, M. (2021). A Study of the Vibration Reduction Effect of Sound Absorbing Material Within Acoustic Box. In: Oberst, S., Halkon, B., Ji, J., Brown, T. (eds) Vibration Engineering for a Sustainable Future. Springer, Cham. https://doi.org/10.1007/978-3-030-48153-7_11
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DOI: https://doi.org/10.1007/978-3-030-48153-7_11
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