A modal impedance technique for mid and high frequency analysis of an uncertain stiffened composite plate

Seçgin, Abdullah; Kara, Murat; Ozankan, Altay

doi:10.1016/j.jsv.2015.12.027

Cited by 11 publications

(14 citation statements)

References 27 publications

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“…Mean energy of a subsystem is represented in terms of not only driving mobilities (as in conventional SEA) but also in terms of transfer mobilities. These mobilities are computed as in the instruction given below for an illustrative structure shown in Figure 1(a): 17 – A complex structure is divided into its subsystems (Figure 1(b)). – Each subsystem is remodeled by adopting appropriate boundary conditions to approximately reflect this single subsystem as part of the entire system (Figure 1(c)) via any deterministic method. – Modal analysis is then performed for each single subsystem to evaluate the modal coefficients, mode shapes, and natural frequencies using any appropriate numerical technique.…”

Section: Modal Impedance-based Statistical Energy Analysismentioning

confidence: 99%

“…Seçgin et al. 17 introduced a modal impedance technique for mid- and high-frequency vibration analysis for point connected systems. Guyader et al.…”

Section: Introductionmentioning

confidence: 99%

“…3,4,22 proposed statistical modal energy distribution analysis (SMEDA) method to determine energy densities of coupled subsystems. Although the boundary condition implementation of subsystems via SMEDA and the modal impedance technique 17 seems similar, there are some main differences between the methodologies in the calculation of CLF, input power, and energies of subsystems. Briefly, SMEDA computes CLFs regarding the modal approach of SEA.…”

Section: Introductionmentioning

confidence: 99%

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A modal impedance-based statistical energy analysis for vibro-acoustic analysis of complex systems having structural uncertainty

Seçgin

Kara

Ozankan

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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A modal impedance-based statistical energy analysis for point, line, and area connected complex structural-acoustic systems is introduced. The proposed methodology is applied to perform mid- and high-frequency vibro-acoustic analysis of a cabinet model. The cabinet is composed of several composite plates with local mass variability simulating structural uncertainty, isotropic beams, and an acoustic enclosure. The method uses point mobilities, which are determined using modal parameters obtained by finite element method, to define line and area mobilities via dimension reducing principle. The methodology presented here is successfully verified by several numerical and experimental Monte Carlo computations. With this study, conventional statistical energy analysis is improved for mid-frequency vibro-acoustic analysis of complex systems.

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Section: Modal Impedance-based Statistical Energy Analysismentioning

confidence: 99%

“…Seçgin et al. 17 introduced a modal impedance technique for mid- and high-frequency vibration analysis for point connected systems. Guyader et al.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A modal impedance-based statistical energy analysis for vibro-acoustic analysis of complex systems having structural uncertainty

Seçgin

Kara

Ozankan

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…An efficient uncertainty quantification scheme for frequency responses of laminated composite plates is examined by Dey et al [56]. Seçgin et al [57] introduced a modal impedance technique for mid frequency vibration analyses and employed a Monte Carlo simulation for uncertainty analysis. The cantilever non-uniform gravity-loaded Euler-Bernoulli beams are numerically analysed to find the probabilistic nature of the stiffness distribution for the known probability distributions of the frequencies by Sarkar et al [58].…”

Section: Introductionmentioning

confidence: 99%

The effect of uncertain material properties on free vibrations of thin periodic plates

Jędrysiak

Ostrowski

2017

Meccanica

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Thin periodic plates with uncertain properties in a periodicity cell are investigated. To describe dynamics of these plates the non-asymptotic tolerance modelling method, cf. Woźniak and Wierzbicki (Averaging techniques in thermomechanics of composite solids. Wydawnictwo Politechniki Często-chowskiej, Częstochowa, 15), Woźniak et al. (eds.) (Thermomechanics of microheterogeneous solids and structures. Tolerance averaging approach. Wydawnictwo Politechniki Łódzkiej, Łódź, 16), for those plates is applied. The governing equations of tolerance models based on this method take into account the effect of period lengths on the overall behaviour of the plate. Hence, the additional effects of the periodicity can be analysed, as higher order vibrations. Moreover, properties of the plate in the periodicity cell are determined uncertainly. To analyse an influence of random variables of the properties with a fixed probability distribution on vibrations of the plate the Monte Carlo analysis is applied.

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“…Each of these methods began by analyzing different prototypical systems, overcoming obstacles such as different coordinate systems [14], spatial parametric or geometric distributions [15], and property uncertainty [16]. Reinforcements, discontinuities [17], and even nonlinear systems have been investigated [18,19].…”

Section: Introductionmentioning

confidence: 99%

High Frequency Analysis of a Point-Coupled Parallel Plate System

Culver

Dowell

2017

Journal of Vibration and Acoustics

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The root-mean-square (RMS) response of various points in a system comprised of two parallel plates coupled at a point undergoing high frequency, broadband transverse point excitation of one component is considered. Through this prototypical example, asymptotic modal analysis (AMA) is extended to two coupled continuous dynamical systems. It is shown that different points on the plates respond with different RMS magnitudes depending on their spatial relationship to the excitation or coupling points in the system. The ability of AMA to accurately compute the RMS response of these points (namely, the excitation point, the coupling points, and the hot lines through the excitation or coupling points) in the system is shown. The behavior of three representative prototypical configurations of the parallel plate system considered is: two similar plates (in both geometry and modal density), two plates with similar modal density but different geometry, and two plates with similar geometry but different modal density. After examining the error between reduced modal methods (such as AMA) to classical modal analysis (CMA), it is determined that these several methods are valid for each of these scenarios. The data from the various methods will also be useful in evaluating the accuracy of other methods including statistical energy analysis (SEA).

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A modal impedance technique for mid and high frequency analysis of an uncertain stiffened composite plate

Cited by 11 publications

References 27 publications

A modal impedance-based statistical energy analysis for vibro-acoustic analysis of complex systems having structural uncertainty

A modal impedance-based statistical energy analysis for vibro-acoustic analysis of complex systems having structural uncertainty

The effect of uncertain material properties on free vibrations of thin periodic plates

High Frequency Analysis of a Point-Coupled Parallel Plate System

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