Prediction of the response of a thin structure subjected to a turbulent boundary-layer-induced random pressure field

Esmailzadeh, M.; Lakis, A. A.; Thomas, Marc; Marcouiller, L.

doi:10.1016/j.jsv.2009.07.027

Cited by 12 publications

(2 citation statements)

References 27 publications

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“…Most previous studies (Hwang & Maidanik 1990; Hambric, Hwang & Bonness 2004; Esmailzadeh et al. 2009; Blake 2017) of plate vibration and far-field sound used wall-pressure models. Advances in high-performance computing now allow us to directly compute the unsteady turbulent wall-pressure fluctuations at moderate Reynolds numbers using direct numerical simulation (DNS) (Moin & Mahesh 1998; Lee & Moser 2015).…”

Section: Introductionmentioning

confidence: 99%

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Direct numerical simulation-based vibroacoustic response of plates excited by turbulent wall-pressure fluctuations

Prajapati,

Anantharamu,

Mahesh

2023

J. Fluid Mech.

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We use direct numerical simulation to study the vibroacoustic response of an elastic plate in a turbulent channel at $Re_\tau$ of 180 and 400 for three plate boundary conditions and two materials – synthetic rubber and stainless steel. The fluid–structure–acoustic coupling is assumed to be one-way coupled, i.e. the fluid affects the solid and not vice versa, and the solid affects the acoustic medium and not vice versa. The wall pressure consists of intermittent large-amplitude fluctuations associated with the near-wall, burst-sweep cycle of events. For stainless steel plates, displacement has similar large-amplitude peak events due to comparable time scales of plate vibration and near-wall eddies. For synthetic rubber plates, large-amplitude displacement fluctuations are observed only near clamped or simply supported boundaries. Away from boundaries, plate displacement resembles an amplitude-modulated wave, and no large-amplitude events are observed. We discuss displacement and acoustic pressure spectra over different frequency ranges. For frequencies much smaller than the first natural frequency, the product of plate-averaged displacement spectrum and bending stiffness squared collapses with Reynolds number and plate material in outer units. At high frequencies, displacement and acoustic pressure spectra scale better in inner units, and the scaling depends on the type of damping. For synthetic rubber plates, the spectra display an overlap region that collapses in both outer and inner units. Soft plate deformation displays a range of length scales. However, stiff plate deformation does not exhibit a similar range of scales and resembles plate mode shapes. The soft plate has two distinct deformation structures. Low-speed, large deformation structures with slow formation/break-up time scales are found away from boundaries. High-speed, small deformation structures with fast formation/break-up time scales formed due to boundary reflections exist near the boundaries.

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Section: Introductionmentioning

confidence: 99%

“…2009; Esmailzadeh et al. 2009; Ciappi et al. 2015; Hambric, Sung & Nefske 2016; Blake 2017) that use wall-pressure models rely on thin-plate theory (also called Poisson–Kirchoff plate theory) to describe the plate dynamics and modal summation to evaluate the plate response.…”

Section: Introductionmentioning

confidence: 99%