Measurement and modeling of damping for time-domain structural acoustics simulations

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.
Complete list of metadatas

Cited literature [6 references]  Display  Hide  Download

https://hal-ensta-paris.archives-ouvertes.fr//hal-00975230
Contributor : Benjamin Cotté <>
Submitted on : Tuesday, April 8, 2014 - 11:16:55 AM
Last modification on : Wednesday, July 3, 2019 - 10:48:04 AM
Long-term archiving on : Tuesday, July 8, 2014 - 11:25:40 AM

File

nc13_26.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-00975230, version 1

Collections

Citation

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⟩

Share

Metrics

Record views

373

Files downloads

354