Complicated dynamics exhibited by thin shells displaying numerous internal resonances: application to the steelpan

Mélodie Monteil 1 Cyril Touzé 1 Olivier Thomas 2
1 UME - Unité de Mécanique
2 LMSSC - Laboratoire de Mécanique des Structures et des Systèmes Couplés
Abstract : Nonlinear vibrations of a steelpan are experimentally studied. Modal analysis reveals the existence of numerous modes displaying internal resonances of order two and three, enabling the structure to transfer energy from low or high frequency modes. The complicated dynamics in forced vibrations is precisely measured by following the different harmonics of the responses. Energy transfers are explained in light of high order couplings , and a simple model displaying 1:2:2 internal resonance is fitted to the experiments. The measurements reveals that mode couplings are activated for very low amplitudes of order 1/25 times the thickness, and that numerous modes are rapidly excited, giving rise to complex shape frequency response functions. This ease in transferring energy and coupling modes is a key feature for explaining the peculiar tone of the steelpan.
Document type :
Conference papers
Complete list of metadatas

Cited literature [1 references]  Display  Hide  Download
https://hal-ensta-paris.archives-ouvertes.fr//hal-01154714
Contributor : Cyril Touzé <>
Submitted on : Friday, May 22, 2015 - 7:07:12 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:04 AM
Long-term archiving on : Tuesday, September 15, 2015 - 6:45:42 AM

File

ICSV2012Monteil.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-01154714, version 1

Collections

ENSTA | CNAM | ENSTA_UME | UNIV-HESAM | LMSSC-CNAM

Citation

Mélodie Monteil, Cyril Touzé, Olivier Thomas. Complicated dynamics exhibited by thin shells displaying numerous internal resonances: application to the steelpan. International Congress on Sound and Vibration ICSV 19, Jul 2012, Vilnius, Lithuania. ⟨hal-01154714⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

79

Files downloads

65

Contact

CCSD