Abstract:For the purpose of identifying the acoustic characteristics of honeycomb sandwich panels, finite element method (FEM), combined with boundary element method (BEM), has been widely used. However, the latter approach is not always applicable to high frequency analyses since it requires a large number of FEM/BEM meshes. In order to reduce computational resources and modeling times, a hybrid analytical/finite element method (HAFEM) is described that uses a finite element approximation in the thickness direction, w… Show more
“…For this purpose , Kim et al. [340] proposed a hybrid analytical FE method (HAFEM). Therefore, it is possible to employ a small number of finite elements, even in high-frequency situations.…”
This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.
“…For this purpose , Kim et al. [340] proposed a hybrid analytical FE method (HAFEM). Therefore, it is possible to employ a small number of finite elements, even in high-frequency situations.…”
This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.
“…Radiated Sound Power. The calculation of the panels' radiated sound power in the frequency domain requires a rearrangement of the time domain equations presented in (22). For this end, knowing that = as previously described, one can write (28) in the following desired form in the frequency, , domain:…”
Section: Plate Governing Equationsmentioning
confidence: 99%
“…However, in the high frequency analysis these methods often require a large number of FEM/BEM meshes, ultimately resulting in high computational costs. In [22], a hybrid analytical one-dimensional finite element method is derived, which uses FEM approximation in the thickness direction and analytical solutions in the plane directions, thus reducing the number of finite elements required. In this context, the present study addresses this problem through an analytical approach.…”
The present study investigates the vibration and sound radiation by panels exited by turbulent flow and by random noise. Composite and aluminum panels are analyzed through a developed analytical framework. The main objective of this study is to identify the difference between the vibroacoustic behaviour of these two types of panels. This topic is of particular importance, given the growing interest in applying composite materials for the construction of aircraft structures, in parts where aluminum panels were traditionally being used. An original mathematical framework is presented for the prediction of noise and vibration for composite panels. Results show the effect of panel size, thickness of core, and thickness of face layers on the predictions. Smaller composite panels generally produced lower levels of sound and vibration than longer and wider composite panels. Compared with isotropic panels, the composite panels analyzed generated lower noise levels, although it was observed that noise level was amplified at certain frequencies.
“…Since FEM/BEM models require an unacceptable computation cost at high frequencies, Kim and Han [65] propose a hybrid analytical/finite element method (HAFEM) to investigate the STL of a simply supported composite sandwich panel. HAFEM uses a finite element approximation in the thickness direction, while analytical solutions are assumed in the plane direction.…”
This paper reviews the most significant works in literature about the acoustic behaviour of sandwich panels, starting from the first examples of multi-layered structures, comprising a series of different layers enclosing an air-gap, to the actual configurations in which the opportunities of emerging manufacturing technologies are considered in the design stages. The focus is on presenting an exhaustive list of dedicated and validated models, which are able to predict the sound transmission through sandwich panels according to their specific configuration. Some experimental works, aimed to the model correlations, are reviewed, too.
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