Enhancements of the predictions for the turbulence driven panel response

The response of a structural component to the turbulent boundary layer (TBL) excitation is one to the main research topic of the present research group. This multidisciplinary problem is present in all the branches of the transportation engineering; it can be considered a one of the prodromic scheme of the fluid-structure interaction; in fact, from the structural dynamics area can be easily extended with the aeroelastic and acoustoelastic couplings. The current research efforts try (i) to increase the predictive quality, (ii) to reduce the computational cost, (iii) to obtain good agreement with the experimental data. In the present paper, the attention is concentrated on the whole frequency range of the vibro-acoustic response and the target is the set-up of numerical procedures able to satisfy the above-mentioned key-topics. In particular, in the low frequency range, that is in a range where the modal overlap factor is not very high, some specific numerical choices are proposed in order to increase the overall computational performance of the predictive codes. In the medium and high frequency ranges, the main complexity of the predictive tools is linked to the correct representation of the wall pressure fluctuation in the computational scheme. Some numerical approximations are discussed with the aim to reduce the computational cost keeping the predictive quality. The present numerical results are compared to an analytical solution and they demonstrate the possibility to improve the predictive performances of the vibro-acoustic response due to a turbulent boundary layer excitation.