Structural Acoustics and Vibrations

Chaigne, Antoine

doi:10.1007/978-0-387-30425-0_22

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…In the driving process, the most frequent contact is the medium-low frequencies noise (200-500Hz) [50][51][52]. Consequently, we first consider the calculation results at frequency f = 400Hz, and numerically analyze the relationship between supporting nodes m and node spacing ∆h (noted that the node spacing is equivalent to the total number of nodes).…”

Section: 4)mentioning

confidence: 99%

Localized Method of Fundamental Solutions for Acoustic Analysis Inside a Car Cavity with Sound-Absorbing Material

null¹,

Wang²

2023

AAMM

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This paper documents the first attempt to apply a localized method of fundamental solutions (LMFS) to the acoustic analysis of car cavity containing soundabsorbing materials. The LMFS is a recently developed meshless approach with the merits of being mathematically simple, numerically accurate, and requiring less computer time and storage. Compared with the traditional method of fundamental solutions (MFS) with a full interpolation matrix, the LMFS can obtain a sparse banded linear algebraic system, and can circumvent the perplexing issue of fictitious boundary encountered in the MFS for complex solution domains. In the LMFS, only circular or spherical fictitious boundary is involved. Based on these advantages, the method can be regarded as a competitive alternative to the standard method, especially for high-dimensional and large-scale problems. Three benchmark numerical examples are provided to verify the effectiveness and performance of the present method for the solution of car cavity acoustic problems with impedance conditions.

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Section: 4)mentioning

confidence: 99%

Localized Method of Fundamental Solutions for Acoustic Analysis Inside a Car Cavity with Sound-Absorbing Material

null¹,

Wang²

2023

AAMM

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“…Analytical models have been developed to derive dispersion relations for numerous materials and waveguides [6]. For commonly used homogeneous and heterogeneous materials, dispersion relations have been documented in various handbooks and textbooks [7,8]. Numerical methods, such as time and frequency domain spectral element method [9][10][11][12], the semi-analytical finite element method [13,14], the wave finite element method [15,16], and transfer function and transfer matrix methods [17,18] have also been developed to describe wave propagation along uniform and periodically varying waveguides.…”

Section: Introductionmentioning

confidence: 99%

Estimating dispersion curves from Frequency Response Functions via Vector-Fitting

Albakri

Malladi

Gugercin

et al. 2020

Mechanical Systems and Signal Processing

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Driven by the need for describing and understanding wave propagation in structural materials and components, several analytical, numerical, and experimental techniques have been developed to obtain dispersion curves. Accurate characterization of the structure (waveguide) under test is needed for analytical and numerical approaches. Experimental approaches, on the other hand, rely on analyzing waveforms as they propagate along the structure. Material inhomogeneity, reflections from boundaries, and the physical dimensions of the structure under test limit the frequency range over which dispersion curves can be measured.In this work, a new data-driven modeling approach for estimating dispersion curves is developed. This approach utilizes the relatively easy-to-measure, steady-state Frequency Response Functions (FRFs) to develop a state-space dynamical model of the structure under test. The developed model is then used to study the transient response of the structure and estimate its dispersion curves. This paper lays down the foundation of this approach and demonstrates its capabilities on a one-dimensional homogeneous beam using numerically calculated FRFs. Both in-plane and out-of-plane FRFs corresponding, respectively, to longitudinal (the first symmetric) and flexural (the first anti-symmetric) wave modes are analyzed. The effects of boundary conditions on the performance of this approach are also addressed.

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Radiation of Vibrating Structures

Chaigne

2016

Modern Acoustics and Signal Processing

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Structural Acoustics and Vibrations

Cited by 4 publications

References 38 publications

Localized Method of Fundamental Solutions for Acoustic Analysis Inside a Car Cavity with Sound-Absorbing Material

Localized Method of Fundamental Solutions for Acoustic Analysis Inside a Car Cavity with Sound-Absorbing Material

Estimating dispersion curves from Frequency Response Functions via Vector-Fitting

Radiation of Vibrating Structures

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