CONSIDERATIONS ON AN ELEMENTARY FLUID-STRUCTURE COUPLING SYSTEM
In the present paper a one dimensional fluid-structure coupling system is under observation. The system is composed of two coupled subsystems. The first one is a structural mass - spring - damper and the second one is a tube filled with air with a piston which represents the mass of the first subsystem. The solutions of a derived transcendental equation stand for the natural frequencies of the structure−air coupled system. The natural frequencies of both uncoupled subsystems are observed graphically in parallel to the natural frequencies of the coupled system. The coupled system’s natural frequencies are discussed in function of the value of the unique structural natural frequency relative to the natural frequencies of the air filling the tube.
Keywords: fluid-structure coupling system, natural frequency, transcendental equation.
Bădărău, E., Grumăzescu, M., Bazele acusticii moderne, Ed. Acad. RPR,1961.
Coroian, A., Lupea, I., Improving the sound pressure level for a simplified passenger cabin by using modal participation and size optimization, Romanian Journal of Acoustics and Vibration, volume X, Issue 1, pp.100-106, 2013.
Fahy, F., Walker, J., (Editors), Advanced Applications in Acoustics, Noise and Vibration, Taylor & Francis, 2004.
Jun, Z.,and all, Acoustic design optimization for vibration of cylinder container coupled with interior acoustic field, Journal of Sound and Vibration, 328 (2009), 607–617.
Lupea, I., Coroian, A., Considerations On The Vehicle Floor Carpet Vibro-Acoustic Modelling, Acta Technica Napocensis, Series: Applied Mathematics and Mechanics, Vol. 56, Issue II, June 2013, pp.263-268.
Lupea, I., Stremţan Florina - Anca, Topological optimization of an acoustic panel under periodic load by simulation, Acta Technica Napocensis, Vol. 56, Issue III, Oct. 2013, pp.455-460.
Lupea, I., Considerations on the Helmholtz resonator - simulation and experiment, Proceedings of the Romanian Academy, series A, Volume 13, Number 2/2012, pp. 118–124.
Lupea, I., Tibrea Roxana, Acoustic normal modes simulation of a classroom, Acta Technica Napocensis, App. Math. And Mech., vol.54, Issue IV, 2011.
Lupea, I., Vibration and noise measurement by using Labview programming, Casa Cărţii de Ştiinţă, Cluj-Napoca, 2005.
Lupea, I., Szathmari, R., Vibroacoustic frequency response on a passenger compartment, Journal of Vibroengineering, Kaunas, Lithuania, vol. 12 (4), Dec. 2010.
Lupea, I., Roboţi şi vibraţii, Editura Dacia, Cluj-Napoca, 1996.
Nefske, D.J., Wolf,J.A., Howell,L., Structural-acoustic finite element analysis of the automobile passenger compartment: a review of current practice, Journal of Sound and Vibration (1982) 80(2), 247-266, 1982.
Reed, C., Application of Optistruct optimization to body in white design, Altair Engineering Ltd, 2002.
Sheng, G., Vehicle noise vibration and sound quality, SAE International, Warrendale, USA, 2012.
Vadeanu, S., Mecanică - oscilaţii şi unde, UBB, Cluj-N., 1994.
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