Laurent Maxit

Today's innovative companies are using vibration and acoustic modelling to design their products faster and with high acoustic and vibration performance. However, a single universal vibro-acoustic method covering the whole frequency range of interest does not exist in general. The “low frequency” range has been addressed since a long time by deterministic element-based approaches like the finite element method. The “high frequency” range is addressed by the well-known Statistical Energy Analysis (SEA) method which describes the power flow exchanged by the different subsystems in a statistic sense and have shown successful applications, in particular for building modelling. Between these two frequencies ranges, applying these approaches is problematic because of high computational cost or non-respect of the model assumptions. Maxit’s research attempts to propose new modelling techniques for addressing the mid-frequency range. Some of ones like the Condensed Transfer Method (CTF) consists to extend the low frequency method to the mid-frequency whereas others like Statistical model Energy distribution Analysis (SmEdA) consists to extend high frequency SEA method to the mid-frequency. His developments are achieved keeping always in mind the industrial applications. These efforts have been focused on the modelling and the analysis of the sound radiation and transmission of cars or truck cabins in white or with trim, and shipbuilding structures under various excitations like turbulence. He was involved in two European projects (VISPER, SEANET) and his works had been supported by different industrial companies (RENAULT, FIAT, VOLVO TRUCK, TREVES, DCNS, DGA, AREVA, EDF). More recently, he brings an interest for the wave field synthesis for generating random turbulent pressure field and for the acoustic detection of pipe leak using beamforming technique. Research keywords: Vibro-acoustic, mid-frequency range, numerical methods, noise radiation and insulation, heavy fluid-structure interaction, turbulent boundary layer, wave field synthesis, beamforming