Convected field analysis of flat panels response to turbulent boundary layer induced excitation

Vitiello, P.; Rosa, Sergio De; Franco, Francesco

doi:10.1016/j.ast.2007.10.003

Cited by 16 publications

(8 citation statements)

References 21 publications

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“…Regarding the flow-induced vibrations or sound transmission in presence of a turbulent boundary layer excitation, the classic approaches are limited to the blocked pressure assumption [12]. The flow back reaction is taken into account rarely in the literature [1,13]. In addition, the computational cost issues related to mesh requirements due to the lower values of the convective wavelengths in most of the practical cases, remain one of the main limits of standard approaches.…”

Section: Introductionmentioning

confidence: 99%

Aeroelastic Effects on Wave Propagation and Sound Transmission of Plates and Shells

et al. 2020

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Modal approaches are often preferred to the wave-based ones for the evaluation of instability conditions in classical non-lifting aeroelasticity of plates and shells. Here, within a wave-based finite element framework, sub-and supersonic aerodynamic models are introduced to analyse the effect of self-excited aerodynamic loading terms on the dispersive characteristics of structural waves. The method is validated by using a specific literature test-case and is applicable both on isotropic and multi-layered flat and curved structures. The sound transmission is also computed under sub-and supersonic turbulent boundary layer excitations: the effect of including or neglecting the aeroelastic coupling is discussed.

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Section: Introductionmentioning

confidence: 99%

Aeroelastic Effects on Wave Propagation and Sound Transmission of Plates and Shells

et al. 2020

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“…one arrives at the system of homogenous algebraic equations where 2 2 2 2 2 2 2 2 0 2 2 2 2 2 2 2 2 2 2 (27) are the elements of the modal stiffness and mass matrix, respectively. Once the spectrum of natural frequencies ...,…”

Section: Missing Natural Modes Of a Free Platementioning

confidence: 99%

“…The analytical solution to free plate natural vibrations outlined in the paper can be readily applied in the qualitative analysis of complex fluid-structure interaction phenomena such as aeroelasticity (divergence and flutter of compliant flat plates), [26], and aeroacoustics (vibro-acoustic formulations of baffled flat plates), [27].…”

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confidence: 99%

An Analytical Solution to Free Rectangular Plate Natural Vibrations by Beam Modes – Ordinary and Missing Plate Modes

et al. 2016

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SummaryRelatively simple analytical procedures for the estimation of natural frequencies of free thin rectangular plates, based on the Rayleigh quotient and the Rayleigh-Ritz method, are presented. First, natural modes are assumed in the usual form as products of beam natural modes in the longitudinal and transverse directions, satisfying the grillage boundary conditions. Based on a detailed FEM analysis, the missing of some natural modes, defined as a sum and a difference of the cross products of beam modes, is noted. The frequencies of these modes are very similar and identical in some special cases, manifesting in such a way a double frequency phenomenon. These families of natural mode shapes form a complete natural frequency spectrum of a free rectangular plate as a novelty. The reliable approximation of natural modes enables the application of the Rayleigh quotient for the estimation of higher natural frequencies. The application of the developed procedure is illustrated by the case of a free thin square plate. The obtained results are compared with those determined by FEM and also with rigorous ones from the relevant literature based on the Rayleigh-Ritz method. The achieved accuracy is acceptable from the engineering point of view. Furthermore, the same problem is solved by the Rayleigh-Ritz method using approximate natural modes as mathematical ones. Direct and iterative procedures are presented. A small number of mathematical modes and iteration steps are sufficient to achieve reliable results.

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“…Innovative and fast solutions for the stochastic response of a plate have been carried out by many researchers [15][16][17][18][19]. Birgersson et al [15] used spectral finite element and dynamic stiffness methods to analyze the autospectral density of the velocity of a plate due to a turbulent boundary layer.…”

Section: Introductionmentioning

confidence: 99%

“…The power spectrum of the acceleration of the fluid-loaded plate subjected to a turbulent boundary layer was obtained and compared with that obtained with using a classical random approach. Vitiello et al [18] developed a procedure to evaluate the aeroelastic response of a flat plate excited by a turbulent boundary layer. De Rosa and Franco [19] presented an exact and predictive response for a simply supported plate wetted on one side subjected to a turbulent boundary layer.…”

Section: Introductionmentioning

confidence: 99%

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

Esmailzadeh¹,

Lakis²,

Thomas³

et al. 2009

Journal of Sound and Vibration

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Convected field analysis of flat panels response to turbulent boundary layer induced excitation

Cited by 16 publications

References 21 publications

Aeroelastic Effects on Wave Propagation and Sound Transmission of Plates and Shells

Aeroelastic Effects on Wave Propagation and Sound Transmission of Plates and Shells

An Analytical Solution to Free Rectangular Plate Natural Vibrations by Beam Modes – Ordinary and Missing Plate Modes

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

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