Skip to Main content Skip to Navigation
Theses

Modeling of the viscoelastic honeycomb panel equipped with piezoelectric patches in view of vibroacoustic active control design

Abstract : Active control has often been considered for low frequency control of noise radiated by trim panels inside aircraft or helicopter cabins. Trim panels are usually made of honeycomb core sandwich because of their high strength to mass ratio. Active control techniques applied to honeycomb panel have not always given results as good as expected and this thesis aims to understand these limitations based on validated mechanical models of the active panels. For the modeling of honeycomb panels, the main difficulty is to estimate equivalent properties for the core. A numerical homogenization procedure is introduced to estimate effective parameters of a shell/volume/shell model based on the correlation with periodic modes of a detailed 3D model. The use of periodic modes allows a detailed analysis of the influence of constituent properties, especially glue and skin. Tests show that the considered Nomex based honeycomb has significantly viscoelastic behavior. In the model, the viscoelastic behavior of the core is taken into account by a frequency dependence of material parameters. Piezoelectric actuators and sensors are included in the validated honeycomb model. Strategies for integration in a numerical design process are discussed. Finally, the static response to an applied voltage is shown to correspond to a blister shape with local bending of the skin rather than global bending of the panel. This behavior results in poor actuator performance, which is also found in a realistic panel configuration studied at ONERA.
Complete list of metadatas

Cited literature [56 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00541575
Contributor : Etienne Balmes <>
Submitted on : Tuesday, November 30, 2010 - 7:46:46 PM
Last modification on : Wednesday, July 8, 2020 - 11:10:20 AM
Long-term archiving on: : Tuesday, March 1, 2011 - 3:08:03 AM

Identifiers

  • HAL Id : tel-00541575, version 1

Collections

Citation

Florens Corine. Modeling of the viscoelastic honeycomb panel equipped with piezoelectric patches in view of vibroacoustic active control design. Mechanics [physics.med-ph]. Ecole Centrale Paris, 2010. English. ⟨tel-00541575⟩

Share

Metrics

Record views

527

Files downloads

865