On the dynamic behavior of composite panels under turbulent boundary layer excitations

Ciappi, E.; Rosa, Sergio De; Franco, Francesco; Vitiello, P.; Miozzi, Massimo

doi:10.1016/j.jsv.2015.11.024

Cited by 15 publications

(8 citation statements)

References 31 publications

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“…In this regime, the frequency of the rst mode signicantly decreases and its peak highly reduced due an increase in the level of damping driven by the uidstructure coupling [47]. Similar observations are evidenced by Vitiello et al (2008) [48] and Ciappi et al (2016) [49].…”

Section: Grazing Ow Excitationsupporting

confidence: 57%

The use of locally resonant metamaterials to reduce flow-induced noise and vibration

Pires

Sangiuliano²,

Denayer³

et al. 2022

Journal of Sound and Vibration

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Section: Grazing Ow Excitationsupporting

confidence: 57%

The use of locally resonant metamaterials to reduce flow-induced noise and vibration

Pires

Sangiuliano²,

Denayer³

et al. 2022

Journal of Sound and Vibration

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“…The prediction of the vibratory field of flat plates under air turbulent boundary layer (TBL) excitation has received a lot of attention (see e.g., [1] and [2]) and has been explored with analytical models of infinite and finite plates [3][4][5], numerical models [6][7][8] and experimental procedures [9,10]. Theoretical formulations are either expressed in the space-frequency or in the wavenumber-frequency domains [1].…”

Section: Introductionmentioning

confidence: 99%

Spatial coherence of pipe vibrations induced by an internal turbulent flow

Maxit

Karimi

Guasch

2021

Journal of Sound and Vibration

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Whereas the spatial coherence of wall pressure and vibratory fields induced by turbulent boundary layers (TBLs) on flat plates have been studied at extent, their equivalents for cylindrical structures still need further investigation. To that end, this work develops a semianalytical model which is valid for infinite cylindrical shells filled with a heavy fluid and excited by an internal TBL. The cylindrical shell can be also coupled to two ring stiffeners that account for the flanges generally used to connect a pipe to other portions of a circuit. The crossspectrum density (CSD) function of the shell radial accelerations is estimated from the system circumferential sensitivity functions and the CSD of the wall pressure field induced by the TBL.The spatial coherence of the pipe vibration field is therefore analysed for a pipe with and without flanges. This is of critical importance for applications such as non-intrusive techniques for detecting acoustic sources inside pipes, like beamforming using arrays of accelerometers. If the pipe conveys a flow, the beamforming efficiency can strongly deteriorate because of the background noise induced by the TBL, which pollutes the coherence signal between sensors.The effects that the spatial coherence could have on the beamforming results of a line of point sensors (accelerometers) and a ring of wire sensors (piezoelectric coiled wires) are also investigated in this paper.

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“…Recently, Ciappi and al. [21] studied numerically and experimentally the response of two composite panels under TBL excitation for nearly subsonic flow conditions. They use literature empirical models for the WPF with the input date obtained 85 from the analyses of experimental wall pressure data.…”

Section: Models) Discussion On Different Models Andmentioning

confidence: 99%

Simulation of the pressure field beneath a turbulent boundary layer using realizations of uncorrelated wall plane waves

Maxit

2016

The Journal of the Acoustical Society of America

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This paper investigates the modelling of a vibrating structure excited by a turbulent boundary 15 layer (TBL). Although the wall pressure field (WPF) of the TBL constitute a random excitation, the element-based methods generally used for describing complex mechanical structures consider deterministic loads. The response of the structure to a random excitation like TBL is generally deduced from calculations of numerous Frequency Response Functions. The result is that the process requires costly computational resources. To tackle this issue, an efficient 20 process is proposed for generating realizations of the WPF corresponding to the TBL. This process is based on a formulation of the problem in the wave-number space and the interpretation of the wall pressure field as uncorrelated wall plane waves. Once the WPF have been synthesized, the local vibroacoustic responses are calculated for the different realizations and averaged together in the last step. A numerical application of this process to a plate beneath 25 a TBL is used to verify its efficiency and ability to reproduce the partial space correlation of the excitation. Finally an application on a stiffened panel modelled with the finite element method is proposed to illustrate the interest of the proposed process.Running title: Numerical synthesis of random pressure field 30

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On the dynamic behavior of composite panels under turbulent boundary layer excitations

Cited by 15 publications

References 31 publications

The use of locally resonant metamaterials to reduce flow-induced noise and vibration

The use of locally resonant metamaterials to reduce flow-induced noise and vibration

Spatial coherence of pipe vibrations induced by an internal turbulent flow

Simulation of the pressure field beneath a turbulent boundary layer using realizations of uncorrelated wall plane waves

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