Experimental reproduction of vibration response of a panel under turbulent boundary layer excitation

Start year: 2024

Summary: Random wall-pressure fluctuations due to the turbulent boundary layer (TBL) exist in the flow over aerial or underwater vehicles, creating noise and vibration. To test potential solutions to reduce the TBL-induced noise and vibration, a cost-efficient alternative to wind/water-tunnel measurements involves the laboratory simulation of the response of the panels to TBL excitation. Previously published work has discussed the source scanning technique which is based on a single acoustic source and the synthetic array principle to generate the wall pressure filed on the panel surface (flat [1] or curved [2] surfaces). This project aims to establish an experimental method at UTS to experimentally measure the vibration response of a panel under TBL excitation without using a wind tunnel. The objectives of the project are to: • program the mathematical procedure in MATLAB to understand the influence of each system parameter on the vibration response of the panel through a virtual experiment • establish a laboratory procedure using synthetic array principle to measure the vibration response of a panel under TBL excitation at UTS. 1. Pouye, A., Maxit, L., Maury, C., & Pachebat, M. (2021). Reproduction of the vibroacoustic response of panels under stochastic excitations using the source scanning technique. Journal of Sound and Vibration, 510, 116307. 2. Pouye, Augustin, Cédric Maury, and Laurent Maxit. "Extension of the Source Scanning Technique to Curved Rectangular Panels for the Vibroacoustic Characterization of Structures Under Random Pressure Fields." Available at SSRN 4398166.