Discussion about Different Methods for Introducing the Turbulent Boundary Layer Excitation in Vibroacoustic Models
Abstract
For controlling the noise radiated from vibrating structures excited by turbulent boundary layer (TBL) it is relevant to develop numerical tools for understanding how the structure reacts to TBL excitation. Usually, the wall pressure fluctuations of the TBL are described through statistical quantities (i.e. spacefrequency or wavenumberfrequency spectra) which depend on the TBL parameters. On the other hand, the vibroacoustic models (i.e. Finite Elements, Boundary Elements, Transfer Matrix Methods, Analytical models, etc) evaluate deterministic transfer functions which characterise the response of the considered structures. The first part of this paper focuses on the coupling between the stochastic TBL and the deterministic vibroacoustic models. Five techniques are presented. Numerical applications on an academic marine test case are proposed in order to discuss the calculation parameters and the interests / drawbacks of each technique. In the second part of the paper, the high frequency modelling with the Statistical Energy Analysis (SEA) method is considered. The focus is placed on the estimation of an important input of this method: the injected power by the TBL into the structure for each third octave band.
 Publication:

arXiv eprints
 Pub Date:
 May 2019
 arXiv:
 arXiv:1906.01077
 Bibcode:
 2019arXiv190601077M
 Keywords:

 Physics  Applied Physics;
 Mathematics  Numerical Analysis;
 Physics  Classical Physics;
 Physics  Computational Physics;
 Physics  Fluid Dynamics
 EPrint:
 Flinovia  Flow Induced Noise and Vibration Issues and Aspects, 2014