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Numerical modelling of flow-induced vibration of structures: Part 2

Project Member(s): Karimi, M., Williams, P.

Funding or Partner Organisation: Defence Science and Technology Group of the Department of Defence
Defence Science and Technology Group of the Department of Defence

Start year: 2023

Summary: To predict the vibroacoustic response of a structure excited by a turbulent boundary layer (TBL), the turbulent pressure field should be obtained on the surface of the structure. This can be done using direct numerical simulation (DNS) or large eddy simulation (LES). However, these simulations are computationally very expensive. An alternative approach involves a steady-state RANS solution to predict the TBL parameters and then to use these parameters as an input to analytical or semi-empirical models to predict the wall pressure field (WPF) under the TBL. To describe the random WPF, a statistical model is required. The coupling between the statistical model and a deterministic numerical model of the structure represents a difficulty in the calculation process. In this work, available numerical techniques in literature will be implemented to couple the stochastic TBL and the deterministic vibro-acoustic models. The major advantage of these technique is that they allow element-based numerical methods to be used to examine vibroacoustic response of the structure under TBL excitation. These numerical techniques will be validated against numerical and experimental data in literature.

FOR Codes: Acoustics and noise control (excl. architectural acoustics), Numerical analysis , Maritime, Management of noise and vibration from transport activities