Article
Multidisciplinary Sciences
Vinicius F. Dal Poggetto, Nicola M. Pugno, Jose Roberto de F. Arruda
Summary: The design of structures with efficient sound insulation performance, particularly panels, is a recurring topic in acoustic engineering. This study extends the optimization approach to design panels that achieve improved sound insulation performance using thickness-varying profiles or locally resonant attachments.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Acoustics
Dong Zhao, Giacomo Squicciarini, Neil Ferguson
Summary: A developed model predicts the vibroacoustic response of stiffened plates excited by different incident sound fields. It is found that stiffeners enhance vibroacoustic coupling, with the most significant effects from different types of acoustic excitation and the contribution from modal cross terms to the sound transmission loss results.
Article
Engineering, Mechanical
Mahmoud Karimi, Laurent Maxit
Summary: Traditionally, acoustic source localisation in a fluid is done using a microphone array to measure sound pressure, followed by acoustic beamforming. However, in some cases, placing the array in the fluid is not feasible. This study proposes a vibroacoustic beamforming method that uses vibration signals measured at the surface of a structure in contact with the fluid to localise the source. The performance of this method is compared with traditional acoustic beamforming techniques using numerical simulations.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Acoustics
Yu-Zhou Wang, Li Ma
Summary: Sandwich structures, especially curved ones, have garnered significant attention due to their superior stiffness and strength. These structures are essential for meeting mechanical loads as well as thermal, acoustic, optical, and electrical challenges. This paper proposes a composite structure that combines curved shell sandwich structures with acoustic metamaterials to achieve desired mechanical and acoustic properties. The theoretical model is established using the harmonic expansion method and principle of virtual work, and the sound transmission loss (STL) performance is studied along with the impact of structural geometry and material parameters.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Acoustics
Ludi Kang, Bilong Liu, Fengyan An, Dapeng Wei
Summary: The effect of perforating honeycomb walls on the dynamic bending stiffness and sound transmission loss of honeycomb sandwich panels is investigated. The study calculates the dynamic bending stiffness and sound transmission loss of sandwich panels with different cores using a semi-analytical method, and also analyzes the static bending stiffness and flatwise stiffness using finite element method. The influences of honeycomb shape, hole shape, number of perforations, and wall thickness on the vibro-acoustic and mechanical properties are investigated. The results show that square holes in the honeycomb walls can significantly improve the sound insulation of the sandwich panels, providing valuable reference for optimized design in practical applications.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Mechanical
Dan Yao, Jie Zhang, Rui-qian Wang, Xin-biao Xiao
Summary: This study introduces an equivalent modelling approach for the vibroacoustic analysis of railway aluminium extrusion. The equivalent approach is validated and compared with the detailed prediction model, and its applicability is discussed. The results show that the equivalent approach can effectively simulate the vibroacoustic characteristics of the aluminium extrusion and reduce calculation time, providing a foundation for the optimisation design of railway carbody structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Acoustics
Ludi Kang, Bilong Liu, Fengyan An
Summary: This paper proposes an efficient and unified approach based on the frequency-dependent bending stiffness of a laminated plate to predict its sound transmission loss. The approach allows convenient and accurate simulation of factors that influence sound transmission loss, and it is validated through comparisons with measured values. The results suggest that achieving good acoustic performance of a designed laminated plate requires a narrow coincidence region located at higher frequencies.
Article
Materials Science, Multidisciplinary
Tohid Adibi, Seyed Esmail Razavi, Shams Forruque Ahmed, Hussein Hassanpour, Neda Mohammadzadeh, S. M. Muyeen
Summary: Controlling noise pollution is crucial in various industries, and the use of elastic plates has a significant impact. However, the effect of a rib and elastic plate on the acoustic properties of a channel for different Reynolds numbers has not been investigated. This study examines the acoustic and flow impacts of a rib and elastic plate, and the results show a 27% increase in transmission loss at the highest position of the elastic plate. By reducing the length of the elastic plate by 50%, the mean transmission loss is reduced by 9%. The findings are important for engineers in designing aircraft, automobiles, and cooling/heating systems.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Bin Li, Ning Wang, Haoyang Ding, Zilai Zheng, Wenjian Kuang, Langlang Wei
Summary: This study investigates the factors that impact the sound radiation performance of foam-filled reinforced sandwich panels using a combined approach of experiments and simulations. The results indicate that porosity has the least influence on sound radiation performance, while static flow resistivity and tortuosity factors have a greater impact on peak sound radiation performance.
APPLIED SCIENCES-BASEL
(2023)
Article
Mechanics
Qinhao Lin, Qili Lin, Yihang Wang, Guoqing Di
Summary: A new sandwich structure called SSCRAM is proposed to improve low-frequency sound insulation performance, with analytical results showing superior sound transmission loss compared to other types of sandwich structures. Analysis of the mechanism of sound absorption and insulation provides theoretical guidance for engineering applications.
COMPOSITE STRUCTURES
(2021)
Article
Acoustics
Yu Gao, Kun Liu, Wenan Jiang, Yubin Fang
Summary: The sound insulation performance of a sandwich plate system (SPS) was measured and analyzed using experiments and numerical simulations. The results showed good agreement between the two methods, indicating the effectiveness of the numerical simulation approach. Additionally, the influence of different parameters on sound insulation was evaluated, with the weight of each parameter ranked accordingly. It was found that the significance of parameters varied depending on the frequency range, emphasizing the need to consider frequency ranges in structure design.
SHOCK AND VIBRATION
(2022)
Article
Acoustics
Yongzhen Mi, Xiang Yu
Summary: This paper introduces a new type of acoustic metamaterial with improved sound insulation performance by attaching periodic inertial amplification mechanisms to a host beam. The enhancement in low-frequency soundproof capacity is significant, but there is also an undesired sound insulation valley observed at higher frequencies.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Materials Science, Multidisciplinary
Ting Wang, Hanbei Guo, Meixia Chen, Wenkai Dong
Summary: The vibroacoustic characteristics of a metamaterial plate with local resonance are theoretically investigated in this study, providing design guidelines for achieving desired vibroacoustic characteristics.
ACTA MECHANICA SOLIDA SINICA
(2022)
Article
Chemistry, Physical
Jui-Yen Lin, Chieh-Ting Yang, Yaw-Shyan Tsay
Summary: This research investigated the impact of different CLT wall structures on sound insulation performance and utilized simulation tools to simplify the design process. The results showed that the double wall and CLT combined with gypsum board performed well in sound insulation.
Article
Engineering, Mechanical
Cikai Lin, Gyani Shankar Sharma, Daniel Eggler, Laurent Maxit, Alex Skvortsov, Ian MacGillivray, Nicole Kessissoglou
Summary: The study presents the vibroacoustic response of a structurally excited cylindrical shell submerged in water coated with a soft elastic material embedded with circumferential arrays of resonant inclusions. Different coating designs with varying combinations of homogenised layers are examined to explore their effect on the shell's vibroacoustic response.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
Mastaneh Ahmadi, Mostafa Talebitooti, Roohollah Talebitooti
Summary: This article presents numerical results on the acoustic transmission characteristics of functionally graded carbon nanotube-reinforced composite cylindrical shells. The results show that the distribution of carbon nanotubes, volume fraction, shell thickness, and Mach number have a significant effect on sound transmission loss.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Acoustics
Isaac Pakravan, Ali Heidari Soureshjani, Roohollah Talebitooti, Mostafa Talebitooti
Summary: This study investigates the free vibrational behaviors and buckling characteristics of carbon nanotube-reinforced conical shells using the Haar wavelet technique. Material performance in thermal environments and the use of carbon nanotubes are highlighted, with governing equations derived through Hamilton's principle and the first-order shear deformation theory. The ability of the Haar wavelet approach to discretize equations and calculate frequencies with minimal collocation points is demonstrated for assessing the structural integrity and precision of the proposed approach, including the study of various parameters such as nanotube geometry, boundary conditions, temperatures, and material properties.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Materials Science, Textiles
Mohammad Hosein Beheshti, Ali Khavanin, Ali Safari Varyani, Musli Nizam Bin Yahya, Ali Alami, Farahnaz Khajenasiri, Roohollah Talebitooti
Summary: The study demonstrates that using micro-perforated panels with different thicknesses and porous materials can improve sound absorption performance, but may also affect the absorption coefficient and frequency range. Therefore, a balance between these factors needs to be considered in the design process.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Engineering, Multidisciplinary
Masoud Rezaei, Roohollah Talebitooti
Summary: Tri-stable magneto-piezoelastic oscillators show superior performance in terms of resonance frequency and excitation threshold compared to linear and bi-stable systems. By investigating the potential of these oscillators for simultaneous vibration suppression and energy harvesting, this study introduces a tri-stable magnetopiezoelastic absorber. The absorber, utilizing magnetic elements, demonstrates nonlinear restoring forces and is effective in various excitation scenarios.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Mechanics
Masoud Rezaei, Roohollah Talebitooti, Wei-Hsin Liao
Summary: This paper investigates the simultaneous vibration suppression and energy harvesting using a continuous dynamic vibration absorber (DVA) with piezoelectric coupling. The results show that the DVA can effectively reduce host structure vibrations, up to 98.5%, while also harvesting significant levels of voltage/power. Furthermore, comprehensive investigations on the role of various mechanical and electrical parameters on the system responses were carried out.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Acoustics
Shohreh Reaei, Roohollah Talebitooti
Summary: This study focuses on deriving an analytical solution for calculating sound transmission loss through a double-walled circular cylindrical shell with two isotropic skins and a polymeric foam core. The equations of motion are derived using the first-order shear deformation theory and the Zener mathematical model is employed to determine the mechanical properties of the core. The results show that the presented model has high accuracy and decreasing the power-law exponent of the core improves the sound transmission loss.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Acoustics
Hasan Seilsepour, Mohamadreza Zarastvand, Roohollah Talebitooti
Summary: In this paper, a viscoelastic model is proposed to determine the sound transmission loss coefficient of a sandwich shell system with double curvature. The results show that the applied strategy can improve the acoustic characteristics of the system at high frequencies, and the effect becomes more significant with increased thickness.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Acoustics
Mohammad Kornokar, Hesamoddin Shahsavari, Kamran Daneshjou, Roohollah Talebitooti
Summary: This paper proposes a model to investigate sound transmission through double-walled cylindrical shells with a circumferentially corrugated core. The research findings suggest that the presence of the corrugated core has different effects on the sound transmission loss of the structure, depending on the desired frequency range.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Ahad Amiri, Roohollah Talebitooti
Summary: This paper examines the size-dependent nonlinear forced dynamics of MRE-cored sandwich micro-pipes in the presence of external distributed load and internal flow. The study utilizes the Euler-Bernoulli beam theory and the modified couple stress theory to derive a mathematical formulation of the problem. The nonlinear equations are then solved using the multiple scales method to obtain the nonlinear natural frequencies and frequency-response curves of the system. The findings highlight the significant role of the MRE core and its intrinsic characteristics on the dynamic response of the system, suggesting that it can be a promising candidate for controlling and enhancing the dynamic properties and response of mechanical systems.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Instruments & Instrumentation
M. Ghassabi, R. Talebitooti
Summary: This paper focuses on using graphene-platelet reinforced composites and magneto-electro-elastic (MEE) materials to improve noise reduction in structures and human living environments. The study analyzes the sound transmission loss (STL) through a three-layer sandwich doubly-curved shell and finds that electromagnetic boundary conditions parameters have the greatest impact on STL. The results show that even a slight change in electric potential can result in significant changes in STL.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Civil
Ahad Amiri, Roohollah Talebitooti, Fatemeh Aliakbari
Summary: This paper develops a comprehensive size-dependent model for analyzing the dynamic and stability of a sandwich micro-shell with a magnetorheological elastomer (MRE) core subjected to fluid flow. The model is based on Donnell's shell theory and modified first strain gradient theory. The effects of fluid flow are considered using perturbation pressure. The governing equations are solved analytically to determine the system's dynamic characteristics. The results demonstrate the significant role of the MRE core properties in controlling the system's dynamic and stability.
THIN-WALLED STRUCTURES
(2022)
Article
Acoustics
M. Ghassabi, F. Motaharifar, R. Talebitooti
Summary: This paper investigates the sound propagation through a two-layer sandwich plate coated with carbon nanotubes and a thin layer of magneto-electro-elastic materials. The governing equations for each layer are derived based on the three-dimensional elasticity theory, and the relationship between the motion equations and electric and magnetic potentials is established. The effective properties of the nanocomposite layer are determined using the rule of mixture. The results show that the addition of a thin coating layer significantly improves the sound insulation in the sandwich plate, and considering electromagnetic boundary conditions enhances the sound transmission loss in the stiffness region.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Acoustics
Mohammad Hossein Asadi Jafari, Mohamadreza Zarastvand, Jianhui Zhou
Summary: The lattice sandwich structure is a new periodic sandwich model with high stiffness and superior strength to density ratio, suitable for lightweight system modeling. This study develops an analytical model to determine the sound transmission loss coefficient of a doubly curved sandwich shell with solid trusses, considering various unit cells. Numerical simulations show that different terms of the truss core have different effects on the sound transmission loss of the modeled structure.
JOURNAL OF VIBRATION AND CONTROL
(2023)
