Vibrations of plates with clamped and free edges excited by low-speed turbulent boundary layer flow

Hambric, Stephen A.; Hwang, Yun Fan; Bonness, William K.

doi:10.1016/j.jfluidstructs.2003.09.002

Cited by 88 publications

(57 citation statements)

References 11 publications

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“…The correlation length is a measure of the extent of spatially coherent power in the wall pressure and is thus an important parameter in studies of structural response to boundary layer excitation [1][2][3]. The nature of the boundary layer is particularly important to studies of aircraft interior noise where the boundary layer is the dominant noise source.…”

Section: Introductionmentioning

confidence: 99%

Determining correlation and coherence lengths in turbulent boundary layer flight data

Palumbo

2012

Journal of Sound and Vibration

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a b s t r a c tWall pressure data acquired during flight tests at several flight conditions are analysed and the correlation and coherence lengths of the data reported. It is found that the correlation and coherence lengths are influenced by the origin of the structure producing the pressure and the frequency bandwidth over which the analyses are performed. It is shown how the frequency bandwidth biases the correlation length and how the convection of the pressure field might reduce the coherence measured between sensors. A convected form of the cross correlation and cross spectrum is introduced to compensate for the effects of convection. Coherence lengths measured in the streamwise direction appear much longer than expected. Coherent structures detected using the convected cross correlation do not exhibit an exponential coherent power decay.Published by Elsevier Ltd.

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Section: Introductionmentioning

confidence: 99%

Determining correlation and coherence lengths in turbulent boundary layer flight data

Palumbo

2012

Journal of Sound and Vibration

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“…This point will be studied on the basic case of a simply supported plate. Moreover, we will highlight how in some situations, the well-known filtering effect of the panel [35,36] 155 can be considered in the process in order to reduce the mesh size of the panel. The accuracy of the proposed process will be studied in function of the WPF model (i.e.…”

Section: Models) Discussion On Different Models Andmentioning

confidence: 99%

“…3a that the contribution of the convective domain is negligible. This is due to the well-known filtering effect of the pressure fluctuations by the panel [35,36]. Thus, for this case, the truncation of the wavenumber space in the streamwise direction can be achieved without considering the convective ridge.…”

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confidence: 99%

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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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“…A comparison between these models has been performed by Graham (1997) and Hambric et al (2004). In these models, the pressure field is assumed to be axially homogeneous.…”

Section: Introductionmentioning

confidence: 99%

Predicting turbulence-induced vibration in axial annular flow by means of large-eddy simulations

Ridder

Degroote

Tichelen

et al. 2016

Journal of Fluids and Structures

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Turbulence-induced vibration is typically considered as a type of vibration with one-way coupling between the fluid flow and the structural motion: the turbulence creates an incident force field on the structure, but the structural displacement does not influence the turbulence. It is however challenging to measure the turbulence forcing function experimentally. In this article, the forcing function in annular flow is computed by means of Large-Eddy Simulations. The pressure spectrum is applied to the inner cylinder and the resulting vibration is computed. It is shown that the commonly used multiplication hypothesis does not hold for the present results. The computed spectrum showed an upper limit to the coherence length. The results of these computations are compared to experimental results available in literature and to semi-empirical models. The predicted displacements compared well with experimental results.

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Vibrations of plates with clamped and free edges excited by low-speed turbulent boundary layer flow

Cited by 88 publications

References 11 publications

Determining correlation and coherence lengths in turbulent boundary layer flight data

Determining correlation and coherence lengths in turbulent boundary layer flight data

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

Predicting turbulence-induced vibration in axial annular flow by means of large-eddy simulations

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