Wave Finite Element Schemes for Vibrations and Noise Under Turbulent Boundary Layer Excitation

Errico, F.; Franco, Francesco; Rosa, Sergio De; Ichchou, Mohamed

doi:10.1007/978-3-030-64807-7_15

Cited by 1 publication

(1 citation statement)

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“…Maxit (2016) considered the turbulent wall pressure as uncorrelated wall pressure plane waves and obtained the acoustical response of the structure by FE-BEM. Errico et al (2018Errico et al ( , 2019 combined the WFE and transfer matrix method to investigate the random response of axisymmetric periodic structures under TBL excitation. Moeller and Miller (2013) established SEA models for vibration responses of flat plates under TBL excitation, emphasizing the influence of structural mode selection.…”

Section: Introductionmentioning

confidence: 99%

Vibroacoustic response of a high-speed train extruded profile under fluid-induced vibration

Zhang

Tang

et al. 2022

Journal of Vibration and Control

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The wall pressure fluctuation caused by a turbulent boundary layer is an important source of noise and vibration in high-speed trains. Considering that railway vehicles are usually made of extruded profiles, a simple and reliable model is needed to predict the vibroacoustic characteristics of extruded profiles excited by a TBL in the early stages of design. A hybrid finite element and statistical energy analysis model is established for computing the vibroacoustic response of finite-sized panels excited by a TBL. In the hybrid model, the wall pressure fluctuation of the TBL is modelled in the wavenumber domain. The panels are modelled using FEs, and acoustic waves in the fluid space below the panels are modelled using SEA. The TBL wall pressure acting on the top surface of the panels is resolved into equivalent nodal forces with discretization of the structure using FEs, achieved by calculating the cross-spectrum matrix of the wall pressure in the spectral domain and using jinc functions with smooth boundary and symmetric properties as shape functions. The reciprocity between direct and reverberant fields couples the acoustic fields to the structure. Once the response of the hybrid model is determined, sound transmission through the panels can be calculated. By following the procedures outlined in this paper, the range of wall pressure model selection for TBL has extended and reduced computational time and provides a basis for the acoustic optimization design of extruded profiles.

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