Spectrally smooth and spatially uniform sound radiation from a thin plate structure using band gaps

Jung, Jaesoon; Jeong, Cheol‐Ho; Jensen, Jakob Søndergaard

doi:10.1016/j.jsv.2020.115187

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…The role of TO as an enabler for AM justifies the unparalleled growth of both [130]. Currently, the Design for Additive Manufacturing (DfAM), which succeeded the Design for Manufacturing (DfM) traditional methods [541,542], employs more or less advanced optimisation tools, spanning practical lattice-based ones, as depicted by Chen et al [543] and illustrated in Figure 13, to complex approaches [544,545], and is already paving its way into structural steel connections [546,547], albeit mostly for tension-only nodes. As highlighted in recent Review Articles [130,424,425,530] as well as Buchanan and Gardner 2019 [421], TO is yet to overcome important challenges to meet AM requirements.…”

Section: Designing For Additive Manufacturing With Topology Optimisationmentioning

confidence: 99%

Topology Optimisation in Structural Steel Design for Additive Manufacturing

2021

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Topology Optimisation is a broad concept deemed to encapsulate different processes for computationally determining structural materials optimal layouts. Among such techniques, Discrete Optimisation has a consistent record in Civil and Structural Engineering. In contrast, the Optimisation of Continua recently emerged as a critical asset for fostering the employment of Additive Manufacturing, as one can observe in several other industrial fields. With the purpose of filling the need for a systematic review both on the Topology Optimisation recent applications in structural steel design and on its emerging advances that can be brought from other industrial fields, this article critically analyses scientific publications from the year 2015 to 2020. Over six hundred documents, including Research, Review and Conference articles, added to Research Projects and Patents, attained from different sources were found significant after eligibility verifications and therefore, herein depicted. The discussion focused on Topology Optimisation recent approaches, methods, and fields of application and deepened the analysis of structural steel design and design for Additive Manufacturing. Significant findings can be found in summarising the state-of-the-art in profuse tables, identifying the recent developments and research trends, as well as discussing the path for disseminating Topology Optimisation in steel construction.

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Section: Designing For Additive Manufacturing With Topology Optimisationmentioning

confidence: 99%

Topology Optimisation in Structural Steel Design for Additive Manufacturing

2021

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“…These structures can achieve physical effects that differ from those obtained with traditional materials. To name a few examples, structures have been designed that can cause acoustic cloaking, 1, 2 yield more uniform sound radiation from thin plates, [3][4][5] achieve high transmission loss values through lightweight partitions, [6][7][8] and generate significant scattering with thin surfaces. 9 Additionally, several studies of AMs as compact, high-absorption surfaces can be found, 10 although references touching upon their angle-dependent behavior are much scarcer.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Optimization of the Angle-Dependent Acoustic Absorption of 2D Infinite Periodic Surfaces of Helmholtz Resonators

Garza-Agudelo¹,

Henrı́quez²,

Jeong³

et al. 2023

J. Theor. Comp. Acout.

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Acoustic metamaterials have emerged as alternative solutions to achieve useful physical effects that differ from the ones obtained with traditional materials. In terms of sound absorption, previous works have addressed their potential as compact surfaces with high performance. Nevertheless, studies on their angle-dependent behavior are scarce. In this work, an analytic model and a numerical model to estimate the performance of periodic surfaces with unit cells composed of 2D Helmholtz resonators are presented. By making use of these modeling tools, the absorption of surfaces with one and three different resonators is studied as a function of both incidence angle and frequency. Changes in the incidence angle can cause variation of the maximum absorption coefficient, the frequencies at which the maximum performance is observed, and the frequency range of significant absorption. Furthermore, the rate at which the performance changes as a function of the incidence angle is larger as the angle increases. Given the angle dependency of these absorbers, a strategy to optimize the dimensions of the surface elements to maximize the absorption performance for predefined ranges of incidence angles and frequencies is presented.

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“…However, it still suffer from the modal behavior of the plate and the cross talk cancellation of the audio exciters. More recently, some references as [7,8] have studied the passive control of plates to improve their sound radiation.…”

Section: Introductionmentioning

confidence: 99%