Abstract
When dealing with internal vibroacoustics, many formulations are available. The classical (u,p) approach uses physical variables (displacement of the structure, pressure in acoustic cavity), and alternatives exist based on a displacement or velocity potential variable instead of the acoustic pressure in the fluid. Each formulation has its own advantages and drawbacks which are addressed in this paper in the context of Component Mode Synthesis for model reduction, but globally all formulations exhibit the same behavior. Thus, the decoupled mode bases which are classically considered for CMS are identical in all formulations providing that the static pressure is not included in the formulation. So, the question addressed in this work deals with the strategies to take the static response of the fluid domain into account in the projection and on the ability of each formulation to adapt to these strategies. Many options are presented for each of the formulations and are applied for two study cases: a shoe box, that is a parallepipedic cavity and a curved box with a more complex geometry.
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Ouisse, M., Sadoulet-Reboul, E. (2011). Efficiency comparison of CMS vibroacoustic formulations for uncertain damped problems. In: Proulx, T. (eds) Sensors, Instrumentation and Special Topics, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9507-0_17
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DOI: https://doi.org/10.1007/978-1-4419-9507-0_17
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