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Enseignement spécifique des masters - AE-09 : Structural Acoustics

Descriptif

This course aims at showing the links between the physical and mechanical source parameters and the radiated noise characteristics. We will give the principles and calculation methods of acoustic fields radiated by vibrating structures:
• modelization of sound sources;
• prediction and measurements of radiated noise (pressure, directivity, power, frequency spectrum and time-domain signature).
The main applications are ground, maritime and air transportation, but also building, energy and musical instrument acoustics.

Objectifs pédagogiques

Compétences:
Characterize simple sound sources (point sources, piston) in terms of radiated pressure, power, adn directivity
Model and describe the pressure field radiated by a vibrating plate in interaction with a fluid

Compétences complémentaires:
Using Matlab software for radiated acoustic field calculations.

nombre d'heure en présentiel

33

nombre de blocs

11

Volume horaire par type d'activité pédagogique : types d'activité

  • Cours magistral : 15
  • Petite classe : 15

effectifs minimal / maximal

10/30

Diplôme(s) concerné(s)

domaines Saclay

Mention Mécanique.

Pour les étudiants du diplôme Master 2 Acoustical Engineering

basic knowledge in linear acoustics and structural dynamics

Format des notes

Numérique sur 20

Littérale/grade européen

Pour les étudiants du diplôme Master 2 Acoustical Engineering

Vos modalités d'acquisition :

1 written (50% of the grade), and 1 computer project (50% of the grade)

Le rattrapage est autorisé (Note de rattrapage conservée)
  • le rattrapage est obligatoire si :
    Note initiale < 7
L'UE est acquise si Note finale >= 10
  • Crédits ECTS acquis : 3 ECTS

Le coefficient de l'UE est : 3

La note obtenue rentre dans le calcul de votre GPA.

L'UE est évaluée par les étudiants.

Programme détaillé

In the first part of the course, we study elementary sound sources:
• pulsating sphere and monopole,
• oscillating sphere and dipole,
• extended sources and Kirchhoff-Helmholtz integral equation.
In the second part of the course, we examine in detail the basic problem of a baffled vibrating plate in interaction with a fluid. We describe the acoustic field radiated in the so-called subsonic and supersonic domains. Then, we show how the results for a flat baffled plate can be extended to more complex geometries (unbaffled plates, shells, cavities).
The lectures come with guided exercises in the classroom and in the computer room.
Veuillez patienter