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Applied Sciences
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Modelling Acoustics, Vibrations, or Vibroacoustics for a Modern Built Environment
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Modelling Acoustics, Vibrations, or Vibroacoustics for a Modern Built Environment

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 3478

Special Issue Editors

Dr. M. Shadi Mohamed

E-Mail Website1 Website2
Guest Editor
Associate Professor, School of Energy, Geoscience, Infrastructure and Society, Heriot–Watt University, Edinburgh EH14 4AS, UK
Interests: acoustics; waves; high order finite element methods
Special Issues, Collections and Topics in MDPI journals
Dr. Takeshi Okuzono

E-Mail Website1 Website2 Website3
Guest Editor
Department of Architecture, Kobe University, Kobe, Japan
Interests: environmental acoustics; computational acoustics; numerical methods; acoustic materials; room/building acoustics simulation; auralization/visualization

Special Issue Information

Dear Colleagues,

Acoustics and vibrations can have a major impact on the health and wellbeing of the residents in urban areas. This is becoming even more important with the increased levels of urbanization and the population density in modern cities. In this Special Issue, we aim to collate engineers, scientists, researchers, and academics who can further  develop our understanding of different aspects of the problem and related techniques. We welcome all contributions made on different aspects of modelling sounds or vibrations. Such studies could be numerical, analytical, and/or experimental. We are also interested in modern applications of such studies as well as related solutions to reduce vibrations or noise levels.

Dr. M. Shadi Mohamed
Dr. Takeshi Okuzono
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • acoustic waves
  • vibrations
  • vibroacoustic
  • Helmholtz equation
  • wave equation
  • indoor/outdoor sound environment
  • acoustic/vibration metamaterials
  • sound/vibrations absorbers
  • acoustic diffusers
  • auralization/visualization

Published Papers (2 papers)

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Research

15 pages, 3952 KiB  
Article
Wave Propagation in Laminated Cylinders with Internal Fluid and Residual Stress
by Elisabetta Manconi, Brian R. Mace and Rinaldo Garziera
Appl. Sci. 2023, 13(9), 5227; https://doi.org/10.3390/app13095227 - 22 Apr 2023
Cited by 2 | Viewed by 1110
Abstract
Numerical computation of wave propagation in laminated cylinders with internal fluid and residual stress is obtained using a Wave Finite Element formulation for 2D waveguides. Only a very small segment of the system is modelled, resulting in a very low-order finite element (FE) [...] Read more.
Numerical computation of wave propagation in laminated cylinders with internal fluid and residual stress is obtained using a Wave Finite Element formulation for 2D waveguides. Only a very small segment of the system is modelled, resulting in a very low-order finite element (FE) model to which the theory of wave propagation in 2D periodic structures is applied. The method uses standard FE formulations and exploits the capability of commercial FE software to model both fluid and structure and their interaction, resulting in a very large reduction in computational time. The presented approach is general, and can be applied without the need to make assumptions related to shell theory or low-frequency analysis. In particular, the laminated structure is discretised using 3D solid elements, thus representing the through-thickness dynamics with high accuracy. Residual radial and hoop stresses are included in the model by adding the FE pre-stress stiffness matrix to the original stiffness matrix of the system. The method provides simultaneously a very substantial reduction of computational cost, accurate solutions up to very high frequency and prediction of the dispersion curves for selected circumferential orders without the need for any further analysis. Here, the formulation of the method is introduced and its application to laminated cylinders filled with an acoustic fluid is presented. A composite, reinforced rubber cylinder, pre-stressed by a circumferential tension, is also shown as an example of a laminated pipe for high-pressure applications. Full article
(This article belongs to the Special Issue Modelling Acoustics, Vibrations, or Vibroacoustics for a Modern Built Environment)
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21 pages, 1923 KiB  
Article
Binaural Auralization of Room Acoustics with a Highly Scalable Wave-Based Acoustics Simulation
by Takumi Yoshida, Takeshi Okuzono and Kimihiro Sakagami
Appl. Sci. 2023, 13(5), 2832; https://doi.org/10.3390/app13052832 - 22 Feb 2023
Cited by 3 | Viewed by 1801
Abstract
This paper presents a proposal of an efficient binaural room-acoustics auralization method, an essential goal of room-acoustics modeling. The method uses a massively parallel wave-based room-acoustics solver based on a dispersion-optimized explicit time-domain finite element method (TD-FEM). The binaural room-acoustics auralization uses a [...] Read more.
This paper presents a proposal of an efficient binaural room-acoustics auralization method, an essential goal of room-acoustics modeling. The method uses a massively parallel wave-based room-acoustics solver based on a dispersion-optimized explicit time-domain finite element method (TD-FEM). The binaural room-acoustics auralization uses a hybrid technique of first-order Ambisonics (FOA) and head-related transfer functions. Ambisonics encoding uses room impulse responses computed by a parallel wave-based room-acoustics solver that can model sound absorbers with complex-valued surface impedance. Details are given of the novel procedure for computing expansion coefficients of spherical harmonics composing the FOA signal. This report is the first presenting a parallel wave-based solver able to simulate room impulse responses with practical computational times using an HPC cloud environment. A meeting room problem and a classroom problem are used, respectively, having 35 million degrees of freedom (DOF) and 100 million DOF, to test the parallel performance of up to 6144 CPU cores. Then, the potential of the proposed binaural room-acoustics auralization method is demonstrated via an auditorium acoustics simulation of up to 5 kHz having 750,000,000 DOFs. Room-acoustics auralization is performed with two acoustics treatment scenarios and room-acoustics evaluations that use an FOA signal, binaural room impulse response, and four room acoustical parameters. The auditorium acoustics simulation showed that the proposed method enables binaural room-acoustics auralization within 13,000 s using 6144 cores. Full article
(This article belongs to the Special Issue Modelling Acoustics, Vibrations, or Vibroacoustics for a Modern Built Environment)
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