ACOUSTIC NORMAL MODES SIMULATION OF A CLASSROOM

Iulian Lupea, Roxana Tibrea

Abstract


The acoustic of enclosed spaces continues to be an important issue in building acoustics, high level of comfort in car habitacles of quality vehicles, industrial facilities and others. The management of acoustic modal parameters plays an important roll in reaching the above targets. In this article the finite element method is used to perform the acoustic normal modes analysis of a classroom, finding out the resonant frequencies and the acoustic modes or the pressure distribution for each mode. The results are compared to a set of values determined by a close related formula. The acoustic modes simulation  is an important step for the frequency response analysis and the acoustic optimization.

Full Text:

Untitled

References


Bădărău, E., Grumăzescu, M., Bazele acusticii moderne, Ed. Academiei RPR, 1961.

Everest F., Pohlmann, K., Master handbook of acoustics, McGraw Hill, 2009.

Fahy, F., Foundation of engineering acoustics, Elsevier Academic Press, 2005.

Lawrence, E., Austin, R., Coppens, A., Fundamentals of acoustics, John Wiley & Sons, Inc. NewYork, 2000.

Heylen, W., Lammens, S., Sas P., Modal Analysis Theory and Testing, Leuven: Katholieke Universteit Leuven, Department Werktuigkunde, 2002.

Lupea, I., Vibration and Noise measurement by using Labview programming, Casa Cărţii de Ştiinţă Publisher, Cluj-Napoca, 2005.

Lupea, I., Szathmari, R., Vibroacoustic frequency response on a passenger compartment, J. of Vibroengineering, Kaunas, Lithuania vol. 12 (4), Dec. 2010.

** HyperWorks - Optistruct, Altair Eng., Troy, MI, USA.


Refbacks

  • There are currently no refbacks.


JOURNAL INDEXED IN :