Abstract : This work deals with the measurement and time-domain modeling of damping in structural acoustics. An experimental technique based on the plate impulse response measurement is presented to estimate the damping factor over a wide frequency band. This technique is succesfully applied to a nylon plate between 100 Hz and 15 kHz approximately. Then we present an original approach that consists in representing the measured frequency variations of damping by a digital filter that meets the criteria of causality and stability, and then in transposing it into the time domain. Time-domain simulations of the longitudinal vibrations of a nylon bar are performed to show the efficiency of our approach, where the filter parameters are estimated from the experimental data through an optimization procedure.
https://hal-ensta-paris.archives-ouvertes.fr//hal-00975230
Contributor : Benjamin Cotté
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Submitted on : Tuesday, April 8, 2014 - 11:16:55 AM
Last modification on : Wednesday, July 3, 2019 - 10:48:04 AM
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Benjamin Cotté, Augustin Parret-Fréaud, Antoine Chaigne. Measurement and modeling of damping for time-domain structural acoustics simulations. Noise-Con 2013, Aug 2013, Denver, CO, United States. CD-ROM proceedings. ⟨hal-00975230⟩
