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Article
Acoustics
Hui Sheng et al.
Summary: This paper presents a modified add-on strategy using multiple acoustic black hole dynamic vibration absorbers to reduce the transverse vibration of beam structures, with the intention of achieving broadband vibration suppression by introducing intentional mistuning effect. Several case studies and multi-objective optimization are conducted to demonstrate the effectiveness of the proposed strategy and its potential for widening the attenuation bandwidth of the acoustic black hole structures.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Engineering, Civil
Qingsong Feng et al.
Summary: This study analyzes the dispersion characteristics of box girder structures by developing a semi-analytical method based on the energy method. The method utilizes virtual springs to simulate Bloch boundaries, addressing the complexity of constructing displacement functions that satisfy the Bloch boundary conditions. By simplifying the box girder structure to a spatial plate coupling model and establishing a dispersion control equation, the propagation characteristics of elastic waves in the box girder are studied.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Zhiwei Wan et al.
Summary: This study proposes a new method to improve the vibration suppression performance of acoustic black hole (ABH) structures in the low-frequency range by adding shunt damping. The results show that the ABH plate has excellent vibration damping performance at high frequencies but is less effective at low frequencies. By using shunt damping, the researchers successfully suppressed four resonate formants in the low-frequency band and improved the high-frequency vibration characteristics by increasing the thickness of the damping layer.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Jie Deng et al.
Summary: Attaching periodic local resonators to form a metamaterial acoustic black hole (MMABH) plate can effectively suppress low-to high -frequency sound radiation. The MMABH can substantially reduce sound radiation at all frequencies thanks to the combination of bandgaps and the slowing down of supersonic bending waves.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Xu Chen et al.
Summary: Acoustic black holes (ABHs) have attracted increasing attention in the field of vibration suppression, sound radiation control and energy harvesting. However, they are unable to be triggered at low frequencies. By combining an ABH beam with a negative stiffness element, a novel method to enhance vibration reduction at low frequencies is proposed. The results show that the proposed NS-ABH beam can achieve remarkable vibration reduction below the cut-on frequency without sacrificing the ABH effect at higher frequency.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Acoustics
Jie Deng et al.
Summary: This paper proposes a wave and Rayleigh-Ritz method (WRRM) for analyzing the vibrations of periodic systems. The method expands the system response using suitable basis functions to overcome the difficulties of the Rayleigh-Ritz method. The paper also studies the vibration reduction characteristics of periodic acoustic black holes (ABHs) and examines the role of the imaginary part of complex dispersion curves in the functioning of ABH periodic structures.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Acoustics
Tong Zhou et al.
Summary: This paper proposes a planar swirl-shaped Acoustic Black Hole (ABH) absorber, which exhibits good performance in experimental studies, enabling broadband multi-directional vibration suppression. The absorber has reduced orientation-dependent properties to cope with multi-directional rotational moment excitations, and possesses enhanced energy trapping and dissipation capabilities.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Acoustics
Jie Deng et al.
Summary: This paper introduces a new approach, called the nullspace method (NSM), for dealing with constraints in the Rayleigh-Ritz method (RRM). The NSM computes a set of nullspace fundamental solutions to satisfy the system constraints, and the mechanical system's response is assumed to be a linear superposition of these solutions. The accuracy of the NSM is validated and compared to other methods through simulations on a system composed of an acoustic black hole plate and a uniform plate. The results show that the NSM can overcome the limitations of other methods at a smaller computational cost, making it a promising tool for complex built-up mechanical systems.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Mechanical
Hongli Ji et al.
Summary: This study investigates the vibration transmission characteristics of a plate strip embedded with multiple 2D ABH without additional damping material. The results show vibration attenuation phenomenon below the cut-on frequency of ABHs, with the width and position of the attenuation bands depending on the number of ABHs. The analysis reveals dual physical effects and the important role of local structural resonances induced by ABHs in reducing modal transmission and cancellation. The attenuation phenomenon enriches the understanding of ABH structures and expands the design perspective for vibration attenuation through band creation.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Mechanics
Haiqin Li et al.
Summary: This study presents the design of a unimorph piezoelectric cantilever with an Acoustic Black Hole (ABH) termination for broadband energy harvesting. Optimization of the device by adjusting the location and dimensions of the piezoelectric patch, as well as the shunted circuit, can significantly improve the efficiency and broadband performance.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Acoustics
K. Hook et al.
Summary: This paper investigates the application of feedback control strategy in an ABH terminated beam to minimize taper vibration and reflected wave. The research results show that the taper vibration can be minimized, but the reflected wave cannot.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Acoustics
Jie Deng et al.
Summary: A new design of acoustic black hole (ABH) plate is proposed in this study, featuring attached resonators tuned to suppress the plate's first eigenmode and dampened to lower remaining low-order eigenfrequencies, providing broadband vibration reduction across the frequency range with the ABH effect.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Mechanical
Wenjie Guo et al.
Summary: A new method for calculating band gaps based on the energy method was proposed in this study, which introduced a virtual spring to simulate the boundary conditions of a periodic structure, reducing the amount of calculation and improving efficiency. Compared with traditional energy methods, this method is more precise and reliable, especially when the dimensionality of mass and stiffness matrices increases.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
Wenliang Gao et al.
Summary: In this study, a rainbow metamaterial beam embedded with graded arrangement of Acoustic Black Holes (ABHs) is proposed to achieve broadband vibration attenuation. The attenuation bandgaps can be tuned by changing the geometry parameters of ABHs. Rainbow metamaterial beams exhibit a broader attenuation band and better attenuation effect compared to periodic ones.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Acoustics
Angelis Karlos et al.
Summary: This article explores the enhancement of tapered elastic wedge terminations using multiple wedges. An analytical method based on the exact solution of the non-uniform Euler-Bernoulli beam is used to analyze the system. The results show that the proposed multiple-wedge termination provides higher absorption compared to single-wedge terminations, due to the modal coupling between wedges of different lengths.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Mechanics
Wenliang Gao et al.
Summary: This research presents a mathematical model and solution for investigating wave propagation in graphene platelets (GPLs)-reinforced functionally graded (FG) metal foam plates in a complex environment. The study provides insights into the effects of material properties and geometry on wave propagation characteristics.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Acoustics
Meiyu Li et al.
Summary: This paper proposes integrated acoustic black holes (IABHs) as a new concept for utilizing ABHs, and develops a semi-analytical method to characterize this complex mechanical system. The research shows that properly shaped IABHs can effectively reduce vibrations. The correctness of the analysis model and the damping effect of the optimal IABH are validated through experiments.
Article
Engineering, Multidisciplinary
Yongbin Ma et al.
Summary: A semi-analytical method is developed to calculate the wave propagation properties of thin orthotropic composite plate structures periodically attached to acoustic black hole resonators. The method describes the free and forced vibration of the host orthotropic plate using analytical wave shapes and provides a wave-based description for the resonators using the higher-order WKB method. The equivalent dynamic stiffness of the resonator is obtained by considering the deformation-force relationship at the connections. The method is validated through numerical examples.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Mechanics
Jie Deng et al.
Summary: This study investigates a composite cylindrical shell with an internal thin plate and embedded ABHs. By using the Gaussian expansion method and Gaussian expansion component mode synthesis method, the study validates the effectiveness of ABHs in mitigating the vibration and sound power of the shell.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Jie Deng et al.
Summary: The study proposes a curved ABH design for cylindrical shell walls, quantifying the modal coupling strength between component modes using the modus-desouza method, leading to broadband vibration reduction and noise reduction capabilities.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Acoustics
Zhiwei Wan et al.
Summary: This study proposes a shunt damping-ABH composite beam by pasting shunt damping instead of ordinary damping on the ABH tip, aiming at improving the ABH beam's vibration suppression ability at low frequencies. The effects of different circuits connected to the piezoelectric patch are discussed. The results show that the shunt damping-ABH composite beam could improve the suppressing ability in both the low and high-frequency ranges.
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Acoustics
Jie Deng et al.
Summary: An acoustic black hole termination can enhance the energy harvesting capabilities of a piezoelectric bimorph cantilever. A semi-analytical approach is proposed to characterize performance and allows for efficient parametric analysis of different system configurations. The method is a valuable tool for designing ABH energy harvesting devices.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Mechanical
Jie Deng et al.
Summary: While embedding acoustic black holes in plates is proven to be effective for noise and vibration reduction, their potential for wave manipulation is still in the early stages. Recent studies suggest that plates with ABH indentations act as single-phase metamaterials that can alter wave propagation direction. The focus of this work is on collimating flexural waves in plates through ABH arrangements, with the primary goal being to propose a predictive semi-analytical method and analyze the influence of geometric parameters on ABH arrays' performance.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Acoustics
Haiqin Li et al.
Summary: This study focuses on enhancing the passive damping capacity of an Acoustic Black Hole (ABH) termination by combining contact and geometric nonlinearities, allowing for more efficient energy transfer and the creation of an energy flux from low to high frequencies.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Acoustics
Hongli Ji et al.
Summary: Acoustic black hole structures are gaining attention as passive damping techniques for vibration and noise suppression due to their easy implementation and broad wave focusing and energy dissipation properties. The addition of a two-dimensional circular ABH-based dynamic vibration absorber to existing structures can effectively reduce vibration, with simulation results and analyses identifying two dominant mechanisms governing the physical processes.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Mechanics
Jie Deng et al.
Summary: This paper introduces a new class of phononic crystal consisting of two crossed strip ABHs to open broad and complete BGs in plates, based on the dual benefit of local resonance and Bragg scattering effect. The results show that the BGs can be modulated to very low frequencies via adjusting the ABH parameters, while maintaining the broadband characteristics.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Physics, Applied
Yanni Zhang et al.
APPLIED PHYSICS EXPRESS
(2020)
Article
Acoustics
Sai Sanjit Ganti et al.
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Acoustics
Jie Deng et al.
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Engineering, Mechanical
Jie Deng et al.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2019)
Article
Engineering, Mechanical
Jie Deng et al.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2019)
Article
Acoustics
Jie Deng et al.
JOURNAL OF SOUND AND VIBRATION
(2019)
Article
Engineering, Mechanical
Hongli Ji et al.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2019)
Article
Acoustics
Tong Zhou et al.
JOURNAL OF SOUND AND VIBRATION
(2018)
Article
Physics, Applied
Hongfei Zhu et al.
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Physics, Applied
Liling Tang et al.
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Acoustics
Liling Tang et al.
JOURNAL OF SOUND AND VIBRATION
(2016)
Article
Materials Science, Multidisciplinary
Hongfei Zhu et al.
Article
Instruments & Instrumentation
Liuxian Zhao et al.
SMART MATERIALS AND STRUCTURES
(2014)
Article
Acoustics
D. J. O'Boy et al.
JOURNAL OF SOUND AND VIBRATION
(2010)
Article
Acoustics
VV Krylov et al.
JOURNAL OF SOUND AND VIBRATION
(2004)
