Article
Acoustics
Ahmad Yusuf Ismail, Jisan Kim, Se-Myong Chang, Bonyong Koo
Summary: This paper presents a study on the impact of Helmholtz resonator-based acoustic metasurface on sound transmission loss. By optimizing the design variables of the metasurface, such as the number of cells, thickness, and multilayering, the noise reduction performance of the system can be improved. Experimental validation and numerical results demonstrate the effectiveness of the proposed design.
Article
Acoustics
F. Langfeldt, A. J. Khatokar, W. Gleine
Summary: This paper investigates a new approach for improving the bandwidth of plate-type acoustic metamaterials (PAM) by using Helmholtz resonators. By adding Helmholtz resonators to PAM, the bandwidth of sound transmission loss can be increased without significant reductions in sound transmission loss.
Article
Acoustics
Xiao-Ling Gai, Xi-Wen Guan, Ze-Nong Cai, Xian-Hui Li, Wen-Cheng Hu, Tuo Xing, Fang Wang
Summary: This paper proposes a honeycomb-like sandwich acoustic metamaterial that can effectively control low-frequency noise. By establishing finite element models and analyzing the effects of different parameters, the role of Helmholtz resonators in transmission loss is studied. Experimental results confirm the excellent sound insulation performance of this acoustic metamaterial.
Article
Physics, Applied
Santosh Dasila, Chitti Venkata Krishnamurthy, V. Subramanian
Summary: A miniaturized, broadband absorber with high absorption rate (> 95%) has been proposed and constructed, using quarter-wavelength resonator tubes as rectangular meta-atoms. The study presents the basic theoretical aspects, numerical simulations, fabrication process, and experimental validation of the absorber. The use of simple, fabrication-friendly meta-atoms allows for greater spatial coverage by tiling over large surfaces.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Acoustics
Mingyang Zheng, Chao Chen, Xiaodong Li
Summary: Restricted by resonance principle, Helmholtz resonators can only effectively absorb noise near the resonance frequency. Coupling multiple resonators is an effective way to broaden the absorption band. In this study, numerical simulations and experiments are conducted to investigate the influence of grazing flow and sound incident direction on the acoustic performance. The results show that grazing flow weakens noise suppression ability and alters the acoustic characteristics of the system, while changing the sound incidence direction can mitigate the negative impact.
Article
Acoustics
Pyung-Sik Ma, Hyun-Sil Kim, Seong-Hyun Lee, Ji-Wan Kim
Summary: This paper studies the improvement of sound transmission loss (STL) in a finite plate by attaching a slit-type Helmholtz resonator or a slit resonator. The resonant frequency of the slit resonator is tuned to enhance the poor STL at the dip corresponding to the first natural frequency of the plate. Analytical derivations are used to determine the STL of the slit resonator, plate, and the combined structure. The effects of slit geometry and cavity size on the resonance frequency are explained using an equivalent circular neck of a Helmholtz resonator. The proposed method is validated through experimental results, showing good agreement.
Article
Acoustics
J. Dandsena, D. P. Jena
Summary: This research demonstrates a significant improvement in the bandwidth of interest by installing porous material in the cavity of periodic Helmholtz resonators. The peak amplitude of transmission loss at the resonance frequency regime is damped and impractical when the porous material is installed inside a single resonator. However, with an array of resonators having porous cores, the observed transmission loss has the desired amplitude and elevated bandwidth, making it practical.
Article
Engineering, Mechanical
Hyeonbin Ryoo, Wonju Jeon
Summary: A thin acoustic metasurface is proposed for broadband absorption of low-frequency sound using hybrid resonances at multiple target frequencies, achieving lower Q-factors compared to existing absorbing structures. The design procedures allow for perfect sound absorption at multiple target frequencies, opening possibilities for practical applications in noise mitigation of various mechanical systems.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Nan Gao, Sichao Qu, Jian Li, Jiao Wang, Weiqiu Chen
Summary: The study integrates soft hyperelastic material into the main structure of Helmholtz resonator for the first time to design a star-shaped soft Helmholtz absorber, which can achieve real-time tuning of sound absorption and asymmetric sound absorption by applying different compression loads.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Physics, Multidisciplinary
Jung-San Chen, Tzu-Huei Kuo, Wen-Yang Lo, Cheng-Yi Wang
Summary: This study presents a novel acoustic metasurface with a coplanar series-type Helmholtz resonator with curled necks, which reduces the resonance frequency. The sound absorption performance of this metasurface is investigated theoretically, numerically, and experimentally, demonstrating its effectiveness in absorbing low-frequency sound.
Article
Acoustics
Weiwei Wu, Yiheng Guan
Summary: This article investigated the performance of a modified Helmholtz resonator with a rigid baffle in terms of noise attenuation and frequency band widening. A numerical model was developed to evaluate the effects of different designs, and Design C was found to have better performance.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2022)
Article
Engineering, Aerospace
Dan Zhao, Chenzhen Ji, Myawin Yin
Summary: This work investigates the effects of geometric shape and mean grazing flow on the noise damping performance of parallel-coupled Helmholtz resonators. Experimental and numerical investigations are conducted, and it is found that the cylindrical shaped resonators exhibit higher transmission loss compared to the rectangular-shaped ones. The rigidity of the shared sidewall affects the frequency corresponding to the maximum damping peaks. Furthermore, the damping performance of the coupled resonators is affected by the mean flow Mach number.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Acoustics
Deshi Meng, Lijun Li, Zhenhua Wu
Summary: This study presents the design and experimental validation of acoustic metamaterials with ventilation and broadband asymmetric absorption. An asymmetric absorbing cell (AAC) consisting of detuned Helmholtz resonators connected by sound channels achieves near-perfect sound absorption from the left port, while maintaining a ventilation ratio of 40%. Parallel three-cell asymmetric absorber (PTAA) formed by paralleling three AACs exhibits broadband asymmetric absorption. Additionally, a multi-asymmetric absorber (MAA) with a frequency range of 1000 Hz to 1750 Hz and air circulation capability is designed and fabricated using 3D printing technology.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Chemistry, Multidisciplinary
Nikolaos M. Papadakis, Georgios E. Stavroulakis
Summary: This study investigates the accuracy and applicability of finite element method (FEM) in calculating the resonance frequency of multi-neck Helmholtz resonators. The results show that FEM has high accuracy and applicability, making it useful for research and applications of multi-neck Helmholtz resonators.
APPLIED SCIENCES-BASEL
(2023)
Article
Acoustics
Heming Li, Jinwu Wu, Shanlin Yan, Qibo Mao
Summary: This paper presents the design and development of micro-perforated panel (MPP) absorbers with a variable section partition to solve the broadband sound absorption problem. Three types of MPP absorbers were developed based on the cavity, and their absorption characteristics were investigated and optimized. Experimental results show that the optimized absorbers have superior broadband sound absorption performance compared to conventional MPP absorbers.
Article
Instruments & Instrumentation
K. Billon, M. Ouisse, E. Sadoulet-Reboul, M. Collet, P. Butaud, G. Chevallier, A. Khelif
SMART MATERIALS AND STRUCTURES
(2019)
Article
Instruments & Instrumentation
Kaijun Yi, Morvan Ouisse, Emeline Sadoulet-Reboul, Gael Matten
SMART MATERIALS AND STRUCTURES
(2019)
Article
Acoustics
Morvan Ouisse, David Renault, Pauline Butaud, Emeline Sadoulet-Reboul
JOURNAL OF SOUND AND VIBRATION
(2019)
Article
Physics, Applied
Sami Karkar, Emanuele De Bono, Manuel Collet, Gael Matten, Morvan Ouisse, Etienne Rivet
PHYSICAL REVIEW APPLIED
(2019)
Article
Engineering, Mechanical
S. Timorian, M. Ouisse, N. Bouhaddi, S. De Rosa, F. Franco
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2020)
Article
Engineering, Mechanical
M. A. Campana, M. Ouisse, E. Sadoulet-Reboul, M. Ruzzene, S. Neild, F. Scarpa
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2020)
Article
Engineering, Mechanical
Dario Magliacano, Morvan Ouisse, Abdelkrim Khelif, Sergio De Rosa, Francesco Franco, Noureddine Atalla, Manuel Collet
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2020)
Article
Engineering, Mechanical
Dario Magliacano, Sepide Ashani, Morvan Ouisse, Elke Deckers, Giuseppe Petrone, Wim Desmet, Sergio De Rosa
Summary: Incorporating vibroacoustic treatments using poro-elastic media with periodic inclusions at early stages of product development is an effective strategy for achieving lightweight sound packages. This approach can have significant applications in transportation, energy, and civil engineering fields. The study successfully validates the use of the shift cell operator approach for investigating dispersion characteristics in periodic poro-elastic media.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Acoustics
Guillaume Raybaud, Adrien Pelat, Morvan Ouisse, Francois Gautier
Summary: The study demonstrates that precise control of temperature gradients through a thermal active system acting in a shape memory polymer can tune the damping and stiffness profiles of an enhanced Acoustic Black Hole (eABH) in real time, achieving exact zero reflections.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Acoustics
Guillaume Raybaud, Morvan Ouisse, Julien Leng, Adrien Pelat, Jean-Philippe Groby, Vicent Romero-Garcia, Ruben Pico, Francois Gautier
Summary: This study demonstrates analytically and experimentally the perfect absorption of bending waves in beams by thermally tunable subwavelength absorbers. By tuning the temperature and geometry of the blades in the resonating system, the critical coupling conditions can be simultaneously fulfilled, leading to the perfect absorption of the incident waves in the reflection problem.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Manufacturing
Taiqu Liu, Yves Gaillard, Pauline Butaud, Vincent Placet, Morvan Ouisse
Summary: This study characterizes the dynamic mechanical properties of flax/GreenPoxy composites at the microscale using dynamic grid nanoindentation technique, and proposes two loading protocols. The results show that the experimental protocols have a significant effect on the loss factor while they do not affect the storage modulus significantly. Additionally, the grid nanoindentation technique provides an interesting map of the damping contribution of the various components in the cross-section of the composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Aerospace
S. Del Broccolo, M. Ouisse, E. Foltete, F. Scarpa
ADVANCES IN AIRCRAFT AND SPACECRAFT SCIENCE
(2019)
Proceedings Paper
Engineering, Mechanical
B. Verdin, D. Renault, P. Butaud, M. Ouisse, E. Joseph, T. Jeannin, E. Foltete, G. Chevallier, E. Sadoulet-Reboul
ACTIVE AND PASSIVE SMART STRUCTURES AND INTEGRATED SYSTEMS XIII
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
X. Chen, Y. Meyer, R. Lachat, M. Ouisse
NONDESTRUCTIVE CHARACTERIZATION AND MONITORING OF ADVANCED MATERIALS, AEROSPACE, CIVIL INFRASTRUCTURE, AND TRANSPORTATION XIII
(2019)
Article
Acoustics
Sandip Chajjed, Mohammad Khalil, Dominique Poirel, Chris Pettit, Abhijit Sarkar
Summary: This paper reports the generalization of the Bayesian formulation of the flutter margin method, which improves the predictive performance by incorporating the joint prior of aeroelastic modal parameters. The improved algorithm reduces uncertainties in predicting flutter speed and can cut cost by reducing the number of flight tests.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pascal Zeise, Bernhard Schweizer
Summary: Air ring bearings are an improved version of classical air bearings, providing better damping behavior and allowing operation above the linear threshold speed of instability. However, there is a risk of dangerous vibrations in certain rotor systems, which can be addressed by considering ring tilting effects.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Zbynek Sika, Jan Krivosej, Tomas Vyhlidal
Summary: This paper presents a novel design of a compact six degrees of freedom active vibration absorber with six identical eigenfrequencies. The objective is to completely suppress the vibration of a machine structure with six motion components. By utilizing a Stewart platform structure equipped with six active legs, a spatial unifrequency absorber with six identical eigenfrequencies is achieved. The design is optimized using a correction feedback and active delayed resonator feedback.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kai Li, Yufeng Liu, Yuntong Dai, Yong Yu
Summary: This paper presents a novel light-powered self-oscillating liquid crystal elastomer (LCE) bow that can self-oscillate continuously and periodically under steady illumination. The dynamics of the LCE bow are theoretically investigated and numerical calculations predict its motion regimes. The suggested LCE bow offers potential advantages in terms of simple structure, customizable size, flexible regulation, and easy assembly.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Carmelo Rosario Vindigni, Giuseppe Mantegna, Calogero Orlando, Andrea Alaimo
Summary: In this study, a simple adaptive flutter suppression system is designed to increase the operative speed range of a wing-aileron aeroelastic plant. The system achieves almost strictly passivity by using a parallel feed-forward compensator implementation and the controller parameters are optimized using a population decline swarm optimization algorithm. Numerical simulations prove the effectiveness of the proposed simple adaptive flutter suppression architecture in different flight scenarios.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Nicco Ulbricht, Alain Boldini, Peng Zhang, Maurizio Porfiri
Summary: The quantification of fluid-structure interactions in marine structures is crucial for their design and optimization. In this study, an analytical solution for the free vibration of a bidirectional composite in contact with a fluid is proposed. By imposing continuity conditions and boundary conditions, the coupled fluid-structure problem is solved and applied to sandwich structures in naval construction, offering insights into the effects of water on mode shapes and through-the-thickness profiles of displacement and stress.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Shahram Hadian Jazi, Mostafa Hadian, Keivan Torabi
Summary: Non-uniformity and damage are the main focus in studying vibrations of beam elements. An exact closed-form explicit solution for the transverse displacement of a nonuniform multi-cracked beam is introduced using generalized functions and distributional derivative concepts. By introducing non-dimensional parameters, the motion equation and its closed-form solution are obtained based on four fundamental functions. The impact of crack count, location, intensity, and boundary conditions on natural frequency and mode shape is evaluated through numerical study.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Eugenio Tramacere, Marius Pakstys, Renato Galluzzi, Nicola Amati, Andrea Tonoli, Torbjoern A. Lembke
Summary: This paper proposes the experimental stabilization of electrodynamic maglev systems by means of passive components, providing key technological support for the Hyperloop concept of high-speed and sustainable transportation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pengfei Deng, Xing Tan, He Li
Summary: In this paper, the authors improve the surface morphology method and study the bit-rock interaction model between the rock and the PDC bit, taking into account the impact of blade shape and cutter arrangement. They establish a dynamic model for a deep drilling system equipped with an arbitrary shape PDC bit and propose a stability prediction method. The results show that the shape of the blades and arrangement of the cutters on the PDC bit significantly affect the nonlinear vibration of the drilling system.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Salvador Rodriguez-Blanco, Javier Gonzalez-Monge, Carlos Martel
Summary: In modern LPT designs, the simultaneous presence of forced response and flutter in different operation regimes is unavoidable. Recent evidence suggests that the traditional linear superposition method may be overly conservative. This study examines the flutter and forced response interaction in a realistic low pressure turbine rotor and confirms that the actual response is much smaller than that predicted by linear superposition.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kabilan Baskaran, Nur Syafiqah Jamaluddin, Alper Celik, Djamel Rezgui, Mahdi Azarpeyvand
Summary: This study investigates the impact of the number of blades on the aeroacoustic characteristics and aerodynamic performance of propellers used in urban air mobility vehicles. The results show that different blade numbers exhibit distinct noise levels, providing valuable insights for further research on propeller noise and aerodynamic performance.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Yongbo Peng, Peifang Sun
Summary: This study focuses on the reliability-based design optimization (RBDO) of the tuned mass-damper-inerter (TMDI) system under non-stationary excitations. The performance of the optimized TMDI system is evaluated using probability density evolution analysis. The results demonstrate the technical advantages of TMDI, including high vibration mitigation performance, considerable mass reduction, and less stroke demand.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Guanfu Lin, Zhong-Rong Lu, Jike Liu, Li Wang
Summary: Vision-based measurement is an emerging method that enables full-field measurement with non-contact and high spatial resolution capabilities. This paper presents a single-camera method for measuring out-of-plane vibration of plate structures using motion-parametric homography to capture image variation and displacement response.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Bronislaw Czaplewski, Mateusz Bocian, John H. G. Macdonald
Summary: Despite two decades of study, there is currently no model that can quantitatively explain pedestrian-generated lateral forces. This research proposes a foot placement control law based on empirical data to calibrate and generalize the rigid-leg inverted pendulum model (IPM) for predicting lateral structural stability.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Justine Carpentier, Jean-Hugh Thomas, Charles Pezerat
Summary: This paper proposes an improved method for the identification of vibration sources on a car window using the corrected force analysis technique. By redefining inverse methods in polar coordinates, more accurate results can be obtained.
JOURNAL OF SOUND AND VIBRATION
(2024)
