Article
Engineering, Civil
Zhiwei Wan, Xiang Zhu, Tianyun Li, Junyong Fu
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
Acoustics
K. Hook, S. Daley, J. Cheer
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
Engineering, Mechanical
Runze Zhu, Yunfei Liu, Navya Bojja, Zhaoye Qin, Fulei Chu
Summary: This study proposes a unified modeling approach for rotating thin disks with ABH indentations. Finite element analysis is conducted to validate the proposed model. It is found that ABHs are capable of realizing vibration reduction for rotating structures, where the effectiveness is influenced by rotating speeds and excitation types.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Acoustics
Sun-Yong Kim, Dooho Lee
Summary: This article proposes a modular acoustic black hole (ABH) structure with a helixacoustic black hole (h-ABH) beam to improve its performance. Experimental results show that the reflection coefficients of the h-ABH beam decrease over the entire frequency range and the modular h-ABH system significantly reduces resonance frequencies and damping effects.
Article
Acoustics
Haiqin Li, Mathieu Secail-Geraud, Adrien Pelat, Francois Gautier, Cyril Touze
Summary: An experimental demonstration is reported regarding the broadband passive damping capacity of a vibro-impact acoustic black hole (VI-ABH). The optimal design of VI-ABH can efficiently improve global passive vibration mitigation characteristics by transferring vibrational energy from low-frequency to high-frequency range.
Article
Engineering, Mechanical
Yue Bao, Xiandong Liu, Zhengcheng Yao, Yue Zhang, Yingchun Shan, Tian He
Summary: The acoustic black hole (ABH) is an efficient method for passive vibration reduction. By indenting the ABH in the panel, higher energy density is captured, allowing for efficient vibration energy dissipation by attaching damping material. The dynamic performances of single ABH and ABH array have been investigated, and it is found that ABH arrays effectively increase modal density and loss factor, resulting in better vibration reduction in a broad frequency range.
ACTA MECHANICA SINICA
(2023)
Article
Instruments & Instrumentation
Qidi Fu, Xiaofei Du, Jianwei Wu, Jianrun Zhang
Summary: This study investigates the impact of segmented ABH beam structure on vibration damping and energy concentration. By segmenting the baseline of the ABH and establishing a dynamical model using semi-analytical method, the vibration energy can be more effectively shifted to the ABH area, enhancing energy concentration and vibration attenuation.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Acoustics
Samuel Quaegebeur, Ghislain Raze, Li Cheng, Gaetan Kerschen
Summary: An acoustic black hole is a tapered structure that can trap and dissipate vibrational energy. This paper proposes a virtual acoustic black hole (VABH) which replaces the mechanical ABH with a digital controller, eliminating constraints such as compactness and manufacturing issues. The VABH is theoretically detailed and its performance is demonstrated numerically and experimentally using a cantilever beam. This study shows that the VABH significantly expands the applicability of the ABH concept.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Mechanics
Haiqin Li, Cyril Touze, Adrien Pelat, Francois Gautier
Summary: This study investigates how adding different types of vibration absorbers to an Acoustic Black Hole termination can improve low frequency performance. The simulation results show that all proposed methods efficiently dampen flexural vibrations in a broadband manner. The tuning of different solutions affects their performance.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2021)
Article
Engineering, Mechanical
Weiqi Du, Shuxin Li, Yuanxin Luo
Summary: This study proposes a frequency method based on Gaussian expansion for fatigue analysis of acoustic black hole (ABH) structures. Fatigue damage is directly estimated in the frequency domain through the properties of the modal model of ABH structures. Numerical results show that the proposed method can accurately deal with both 1D and 2D ABH structures.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Civil
Yaxin Zhen, Huayang Li, Ye Tang
Summary: This paper investigates the integration of APPN and ABH for a two-dimensional ABH plate based on Kirchhoff plate theory. The vibration modes of the ABH plate are obtained using the finite element method, and the dynamic models are derived using Hamilton's principle and the Rayleigh-Ritz method. The open-loop and closed-loop control characteristics are analyzed, and it is found that ABH plates with active-passive piezoelectric networks outperform those with active vibration control. Further optimization of the parameters in APPN leads to the best vibration control performance, and the results demonstrate that the combined APPN and ABH system effectively controls vibration and reduces noise.
THIN-WALLED STRUCTURES
(2023)
Article
Acoustics
Hui Sheng, Meng-Xin He, Qian Ding
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
Acoustics
Guillaume Raybaud, Jae Yeon Lee, Wonju Jeon, Adrien Pelat, Francois Gautier
Summary: This paper introduces an Acoustic Black Hole (ABH) embedded in a beam, which absorbs vibrations effectively through the ABH effect. The author adds a visco-elastic coating to the flexible part of the termination, resulting in a reflection coefficient that varies with frequency. The study also develops a new method, involving localized damping with elastic and damping point supports, to control the ABH effect.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Engineering, Civil
Zhiwei Wan, Xiang Zhu, Tianyun Li, Wenjie Guo, Wei Dai
Summary: This study proposes a novel virtual spring energy method (VEM) to solve the vibration characteristics of a plate embedded or attached with acoustic black hole (ABH). A composite ABH structure called Plate-ABH is introduced to overcome stiffness reduction and has strong damping ability and lighter weight compared to a plate attached with a uniform thickness damping layer. The study provides valuable insights for vibration reduction engineering.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Civil
Jie Deng, Nansha Gao, Xu Chen
Summary: This study suggests attaching acoustic black holes (ABHs) with gradient parameters on a base beam to attenuate waves in ultrawide bands. Three types of metabeams have been designed and compared. Analysis of the complex dispersion curves obtained by the wave and Rayleigh-Ritz method indicates that modifying the pillar length may cause some failure bands, which can be circumvented by changing the lattice constant. The forced vibrations of finite beams are recovered using the nullspace method, confirming the advantages of the metabeam with gradient lattice constant. This paper enriches the application range of ABHs.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
M. A. Campana, M. Ouisse, E. Sadoulet-Reboul, M. Ruzzene, S. Neild, F. Scarpa
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2020)
Article
Instruments & Instrumentation
Kaijun Yi, Gael Matten, Morvan Ouisse, Emeline Sadoulet-Reboul, Manuel Collet, Gael Chevallier
SMART MATERIALS AND STRUCTURES
(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
Engineering, Electrical & Electronic
Martin Jeannerot, Morvan Ouisse, Vincent Lanfranchi, Jean-Baptiste Dupont, Emeline Sadoulet-Reboul
Summary: This study introduces a sensitivity analysis methodology for electric motor design, which evaluates the impact of design and uncertain parameters on design objectives. The analysis reveals that acoustic criteria are more sensitive to parameter deviations compared to mean torque. The study indicates robustness issues in acoustic optimization of electric motors.
IET ELECTRIC POWER APPLICATIONS
(2021)
Article
Engineering, Mechanical
R. Chabrier, E. Sadoulet-Reboul, G. Chevallier, E. Foltete, T. Jeannin
Summary: Vibro-impact (VI) based control strategies utilize non-linear phenomena to mitigate vibrations, with a wide application range and environmental advantages. The characterization of VI absorbers in this study helps to better understand the interactions occurring during impacts.
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
Engineering, Mechanical
Emmanuel Bachy, Kevin Jaboviste, Emeline Sadoulet-Reboul, Nicolas Peyret, Gael Chevallier, Charles Arnould, Eric Collard
Summary: This paper introduces the application of tuned mass dampers and multi-frequency designs in vibration reduction. The performance and robustness of a metabsorber consisting of 3D resonators are evaluated numerically and experimentally, and the output of different frequency distributions is compared. The results show that good results can be achieved even with a reduced number of absorbing elements.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Civil
Antoine Ajenjo, Emmanuel Ardillon, Vincent Chabridon, Bertrand Iooss, Scott Cogan, Emeline Sadoulet-Reboul
Summary: The main objective of this work is to study the impact of the choice of input uncertainty models on robustness evaluations for probabilities of failure. Aleatory and epistemic uncertainties are jointly propagated by considering hybrid models and applying random set theory. The notion of horizon of uncertainty found in the info-gap method allows to compare the bounds on the probability of failure obtained from different epistemic uncertainty models at increasing levels of uncertainty. Info-gap robustness and opportuneness curves are obtained and compared for various uncertainty models, and a specific demand value is used as a metric to quantify the gain of information on the probability of failure.
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
Multidisciplinary Sciences
Jesse Paixao, Emeline Sadoulet-Reboul, Emmanuel Foltete, Gael Chevallier, Scott Cogan
Summary: The design of complex engineering structures heavily relies on computational intelligence and science-based predictive models. The proposed self-design paradigm leverages physical intelligence from real-time experimental observations to address uncertainties and achieve customized design with enhanced performance.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Mechanical
R. Chabrier, G. Chevallier, E. Foltete, E. Sadoulet-Reboul
Summary: Vibro-impact absorbers offer a promising and robust solution for reducing vibrations across a wide frequency range. This study focuses on the vibration reduction of a beam using a vibro-impact absorber with adjustable clearance, and identifies the optimal clearance that leads to the lowest vibration level. The study also highlights the relation between different impact regimes and the optimal design of the absorber.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(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, Industrial
Antoine Ajenjo, Emmanuel Ardillon, Vincent Chabridon, Scott Cogan, Emeline Sadoulet-Reboul
Summary: This paper proposes a methodology to analyze the robustness of reliability analysis under epistemic uncertainty. It combines the info-gap framework with advanced failure probability estimators to evaluate the reliability assessment of penstocks. The proposed algorithms, including adapted line sampling procedures, are proven to be suitable for the search of multiple roots involved in the line sampling technique. Additionally, a combination of classification and regression artificial neural network reduces the computational time in predicting the roots in an aleatory and epistemic augmented space.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
M. Jeannerot, J-B Dupont, E. Sadoulet-Reboul, M. Ouisse, V Lanfranchi, P. Bouvet
2020 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES (ICEM), VOL 1
(2020)
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)
