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Finite element model updating and damage detection using strain-based modal data in the Bayesian framework J. Sound Vib. (IF 4.7) Pub Date : 2024-04-18 Raj Purohit Kiran, Sahil Bansal
This paper proposes a novel methodology for Bayesian model updating and damage detection of a structural system using strain-based modal data. The strain-based modal data are assumed to consist of the posterior statistics of natural frequencies and strain mode shapes corresponding to measured strains from a classically damped system. The dynamic strain-based equation of the motion is formulated utilizing
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An integrated approach for response prediction in large-scale rotor-bearing system with local nonlinear joints based on FRF-based harmonic balance method J. Sound Vib. (IF 4.7) Pub Date : 2024-04-11 Haotian Liang, Chaoping Zang, Xunkai Wei, Hao Wang
In the development and maintenance of gas turbines, the efficient computation to predict the responses of large-scale and complex rotating structures with local nonlinear joints is crucial. In this paper, a novel integrated strategy as a trade-off between time expense and accuracy for response prediction in large scale rotor-bearing system with local nonlinear joints is developed using the frequency
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Research on targeted modulation of elastic wave bandgap in cantilever-structured piezoelectric Phononic crystals J. Sound Vib. (IF 4.7) Pub Date : 2024-04-10 Xudong Wu, Yixiang Qu, Pengxuan Qi, Mingyu Liu, Huai Guan
Piezoelectric phononic crystals (PPCs) have the advantages of simplicity and efficiency in controlling elastic wave bandgaps, which can be utilized to solve NVH problems with varying frequency features, such as the low-frequency vibrations caused by the time-varying power source (i.e., motor) in the subframe and underbody of new energy vehicles. However, most of the previous studies on PPCs bandgap
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Relevance of quadrupolar sound diffraction on flow-induced noise from porous-coated cylinders J. Sound Vib. (IF 4.7) Pub Date : 2024-04-10 R. Zamponi, F. Avallone, D. Ragni, C. Schram, S. van der Zwaag
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Nonlinear hardening/softening dynamic analysis and its application to cables: A geometrical framework J. Sound Vib. (IF 4.7) Pub Date : 2024-04-09 Fangyan Lan, Tieding Guo, Wanzhi Qiao, Houjun Kang
Competing mechanisms like quadratic/cubic nonlinearities associated with continuous structures lead to complicated dynamics, and it is meaningful to identify the dominant mechanism in a specific parameter domain. However, when the same parameter arises simultaneously in different competing mechanisms, either hardening (H) or softening (S), it implies that a certain constraint between various parameters
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A numerical assembly technique for free vibration of plane frames using a shifted and deflated Newton method J. Sound Vib. (IF 4.7) Pub Date : 2024-04-09 Thomas Kramer, Michael Helmut Gfrerer
A semi-analytic method, namely the Numerical Assembly Technique (NAT) is extended to compute natural frequencies of arbitrary planar frame structures. The frame structure is systematically defined by a set of nodes, beams, bearings, springs, and external loads and the corresponding boundary and interface conditions are formulated. We consider the Timoshenko-Ehrenfest beam theory and take axial, bending
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Vibration-based detection of non-overlapping delaminations in FRP beams using frequency shifts J. Sound Vib. (IF 4.7) Pub Date : 2024-04-06 Zhifang Zhang, Shoutao Li, Hemant Kumar Singh, Xudong Lan, Ke Zhang, Hongxu Wang, Ching-Tai Ng, Caizheng Wang
Extensive research has been carried out on the detection of single delamination in fibre-reinforced polymer (FRP) structures using different structural health monitoring (SHM) approaches, including the vibration-based assessment methods. However, there are limited studies that on the detection of multiple delaminations, which could occur in many real-world scenarios. To address this research gap, this
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Detection and evaluation of fatigue cracks using a nonlinear ultrasonic sideband peak count technique with a pulse-echo experimental method J. Sound Vib. (IF 4.7) Pub Date : 2024-04-06 Mingzhu Sun, Shuzeng Zhang, Guangdong Zhang, Xiongbing Li, Tribikram Kundu
The nondestructive ultrasonic detection and evaluation of fatigue cracks is critical to ensure the safe operation of equipment. Although linear ultrasonic methods are easy to implement in practice, their parameters are insensitive to micro-scale cracks that are smaller than the wavelength. Conventional nonlinear techniques have better sensitivity but require a relatively complicated configuration and
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Numerical and experimental investigation of a magneto-electro-mechanical oscillator with a new magnet – coil interaction model and energy harvesting J. Sound Vib. (IF 4.7) Pub Date : 2024-04-05 Dariusz Grzelczyk, Mateusz Wojna, Ewelina Ogińska, Grzegorz Wasilewski, Jan Awrejcewicz
The paper investigates a unique configuration of magneto-electro-mechanical system in terms of numerical simulation and experimental analysis. The harmonically excited mass of the oscillator with magnets being suspended by the magnetic spring interacts with the electric coil, inducing current in its’ circuit. Existing and often empirical models found in the literature do not fully describe the interaction
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Acoustic effect of wire mesh liners subjected to grazing flow J. Sound Vib. (IF 4.7) Pub Date : 2024-04-03 Xianghai Qiu, Lin Du, Xiaodong Jing, Xiaofeng Sun
The wire mesh liner usually possesses a better acoustic linearity to flow than perforated liners, but it still lacks an impedance model. So, the grazing flow effect of the mesh liner is studied experimentally herein. It reveals that, relative to perforated liners, the mesh liner has qualitatively similar but quantitatively weakened trends in the grazing flow resistance and reactance . As a mesh occurs
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Aerodynamic noise analysis of tilting rotor in edgewise flow conditions J. Sound Vib. (IF 4.7) Pub Date : 2024-04-03 Nur Syafiqah Jamaluddin, Alper Celik, Kabilan Baskaran, Djamel Rezgui, Mahdi Azarpeyvand
This paper presents a comprehensive experimental analysis of the noise characteristics of an isolated tilt-rotor system under edgewise flight conditions. The investigation explores the effect of rotor tilt on noise and aerodynamics using flow velocity, thrust, and far-field noise measurements. Flow field results show that as the tilting angles vary, there is a change in speed over the rotor blade surface
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Self-adaptive piezoelectric vibration absorber with semi-passive tunable resonant shunts J. Sound Vib. (IF 4.7) Pub Date : 2024-04-02 Jessé Paixão, Emmanuel Foltête, Emeline Sadoulet-Reboul, Gaël Chevallier, Scott Cogan
This paper proposes a novel self-adaptive strategy to control piezoelectric vibration absorbers (PVA) using a semi-passive resonant shunt with tunable inductance for vibration attenuation of harmonically excited structures. The tunable inductor is realized using ferrite cores and its inductance is controlled by means of the air gap effect between the cores using piezoelectric stack actuators. This
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A study on the hydroacoustic characterisation of a cavitating propeller by dynamic adaptive mesh refinement technique J. Sound Vib. (IF 4.7) Pub Date : 2024-03-31 Çağatay Sabri Köksal, Batuhan Aktas, Mehmet Atlar, Emin Korkut
Underwater radiated noise (URN) of a marine propeller has received significant interest in recent decades due to its implications on marine fauna. Therefore, an accurate prediction of URN at an early stage of the propeller design is becoming imperative. This study presents a numerical investigation into the noise prediction of a marine propeller, including cavitation and a comparison with experimental
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BOATS: Bayesian Optimization for Active control of ThermoacousticS J. Sound Vib. (IF 4.7) Pub Date : 2024-03-27 Bayu Dharmaputra, Pit Reckinger, Bruno Schuermans, Nicolas Noiray
This investigation presents novel adaptive control algorithms specifically designed to address and mitigate thermoacoustic instabilities. Gas turbines are limited in their operational range due to thermoacoustic instability. Two control strategies are available to alleviate this issue: active and passive. Active control strategies have a wider flexibility than passive control strategies because they
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An adaptive electrodynamic metamaterial for the absorption of structural vibration J. Sound Vib. (IF 4.7) Pub Date : 2024-03-26 Lawrence Singleton, Jordan Cheer
This paper presents an adaptive shunted electrodynamic metamaterial, for broadband robust vibration control. The study considers a unit cell of 12 miniature, low-cost proof-mass actuators for the control of vibration in a three degree-of-freedom structure subject to parametric uncertainty. In order to modify their dynamic responses, each actuator is connected to a shunt circuit consisting of a parallel
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Model order reduction based on low-rank approximation for parameterized eigenvalue problems in structural dynamics J. Sound Vib. (IF 4.7) Pub Date : 2024-03-23 Gil-Yong Lee, Kang-Jae Park, Dae-Guen Lim, Yong-Hwa Park
This study introduces a novel reduced-order modeling approach for parameterized eigenvalue problems. The proposed framework represents eigenvectors as a low-rank approximation and is implemented using an offline-online strategy. In the offline stage, nonlinear equations are formulated by imposing a stationary condition on the weighted Rayleigh quotient over sampled points and eigenvalues of interest
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Bandgap analysis of periodic composite plates considering fluid–structure coupling J. Sound Vib. (IF 4.7) Pub Date : 2024-03-23 R.Z. Zhang, Y. Cong, M. Sellam, A. Chpoun
This article presents a novel approach for predicting vibration bandgaps in periodic composite plates with fluid–structure interaction (FSI) using a unit cell-based finite element model. The novelty of our approach lies in the formulation of a fluid-induced added mass matrix, which integrates the Bloch periodic boundary condition, allowing for the incorporation of the fluid’s inertial effect in the
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A hybrid wave and finite element/boundary element method for predicting the vibroacoustic characteristics of finite-width complex structures J. Sound Vib. (IF 4.7) Pub Date : 2024-03-21 Yi Yang, Michael Kingan
This paper presents a hybrid wave and finite element/boundary element method for predicting the vibroacoustic characteristics of complex panels characterised by an irregular cross-sectional shape with a non-flat upper surface. In this approach, the panels are treated as waveguides and only a small segment of the panel is modelled using finite elements. The mass and stiffness matrices of the segment
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Extension of the fixed point theory to tuned mass dampers with piezoelectric stack energy harvester J. Sound Vib. (IF 4.7) Pub Date : 2024-03-21 N.D. Anh, Vu Anh Tuan, Pham Manh Thang, N.N. Linh
A tuned mass damper with a piezoelectric stack energy harvester (TMD-PSEH) is a passive vibration control device for the dual purpose of absorbing vibration and harvesting energy. This paper develops the fixed point theory for the optimal design of a TMD-PSEH attached to an undamped primary structure under harmonic external excitation. It has been proven that the existence of two fixed points of the
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Dynamic stiffness formulations for exact modal and dynamic response analysis of three-dimensional acoustic cavities in cylindrical coordinates J. Sound Vib. (IF 4.7) Pub Date : 2024-03-21 Xiang Liu, Jiayu Pei, Xueyi Zhao, Wei Zhou
Exact dynamic stiffness (DS) models for three-dimensional (3D) cavities in cylindrical coordinates under any classical acoustic boundary conditions (BCs) are proposed in this paper. The paper first derives the exact general solutions that satisfy the governing differential equations. Then, these general solutions are used to develop the DS matrices for 3D cavities in cylindrical coordinates by substituting
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Insight into the influence of frictional heat on the modal characteristics and interface temperature of frictionally damped turbine blades J. Sound Vib. (IF 4.7) Pub Date : 2024-03-20 Q. Gao, Y. Fan, Y.G. Wu, L. Li, D.Y. Zhang
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Dynamics of axially moving viscoelastic panels immersed in fluid J. Sound Vib. (IF 4.7) Pub Date : 2024-03-16 You-Qi Tang, Qing-Ke Zhou, Shan-Ying Jiang, Xia Tan
The vibration of axially moving panels immersed in fluid are widely concerned in engineering problems. In this paper, free vibration characteristics and dynamic stabilities of an axially moving viscoelastic panel immersed in fluid are investigated. The governing equation is given by applying the generalized extended Hamilton principle. The axial tension per unit width is related to the axial speed
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The self-tuning fuzzy sliding mode control method for the suspension system with the LSTM network road identification J. Sound Vib. (IF 4.7) Pub Date : 2024-03-14 Xianhao Jiang, Tonghai Chen, Xinhan Xiong, Jing Zeng, Yu Zhao, Ruiqin Chen, Wanli Hao, Taihong Cheng
As an important component of semi-active suspension (SAS) systems, the built-in solenoid valve adjustable damper (BSVAD) is now widely used in the field because of its advantages of fast response, continuously adjustable damping, and lightweight design. However, only a few studies have discussed the BSVAD-modeling method. Hence, this study proposes a method for constructing an agent model using a feedforward
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Nonlinear State-Space Model of Self-excited forces for Bluff Body Aeroelasticity J. Sound Vib. (IF 4.7) Pub Date : 2024-03-14 Guangzhong Gao, Ledong Zhu, Jiawu Li, Ole Øiseth
This paper introduces a novel state-space model of nonlinear self-excited forces designed to capture amplitude dependency and unsteady effects in bluff body aeroelasticity. In the present form, this model represents a theoretical extension of the classical linear state-space model into the nonlinear regime, particularly relevant when a bluff section undergoes large amplitude oscillations. The proposed
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Variationally consistent Elishakoff beam theory: Two finite element implementations and application to flexural wave propagation in carbon nanotubes J. Sound Vib. (IF 4.7) Pub Date : 2024-03-13 F. Gómez-Silva, H. Askes
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Fiber-steered acoustic black hole beam with low cut-on frequency and high stiffness J. Sound Vib. (IF 4.7) Pub Date : 2024-03-11 Koichi Mizukami, Musashi Shiratori, Keiji Ogi
This study proposes an acoustic black hole (ABH) beam with varying carbon fiber orientation and thickness for a low cut-on frequency and high stiffness. The proposed fiber-steered ABH beam contains a laminate with a varying fiber orientation as a junction between a tapered 90° laminate and uniform 0° laminate. The anisotropic viscoelastic properties of the carbon fiber-reinforced plastic were identified
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Multimodal vibration damping of a three-dimensional circular ring coupled to analogous piezoelectric networks J. Sound Vib. (IF 4.7) Pub Date : 2024-03-11 Alan Luo, Boris Lossouarn, Alper Erturk
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A robust probabilistic approach to stochastic subspace identification J. Sound Vib. (IF 4.7) Pub Date : 2024-03-11 Brandon J. O’Connell, Timothy J. Rogers
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Frequency assignment of an assembled structure through links of its substructures J. Sound Vib. (IF 4.7) Pub Date : 2024-03-09 Shike Zhang, Huajiang Ouyang
Structural modifications for assigning desirable natural frequencies and modes are an effective passive vibration control strategy. In many assembled structures, the substructures, which may come from different manufacturers/suppliers or have intended individual functions, do not allow modifications or are difficult to modify. In such common situations, designing proper links or joints used for assembling
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Controllable flexural wave in laminated metabeam with embedded multiple resonators J. Sound Vib. (IF 4.7) Pub Date : 2024-03-08 Xinyue Wang, Guifeng Wang, Zhenyu Chen, C.W. Lim, Shuang Li, Cheng Li
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Tunable shunting periodic acoustic black holes for low-frequency and broadband vibration suppression J. Sound Vib. (IF 4.7) Pub Date : 2024-03-07 Xu Chen, Yan Jing, Jinglei Zhao, Jie Deng, Xijun Cao, Huayan Pu, Huajun Cao, Xiaoxu Huang, Jun Luo
Acoustic Black Holes (ABH) embedded within structures can efficiently damp vibrations above the cut-on frequency but fails below it, particularly when the flexural wavelength exceeds the size of the ABH. Therefore, addressing low-frequency vibration mitigation becomes imperative. Periodic ABH structures and shunt damping have been employed individually and proved effective, yet their combined application
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Dissipation behavior of granular balls in a horizontally vibrated closed container J. Sound Vib. (IF 4.7) Pub Date : 2024-03-07 Kai Zhang, Meng Chen, Wenzhe Li, Huajia Zhong
The dissipation behavior of granular balls in a quasi-two-dimensional closed container subjected to horizontal vibration is investigated by discrete element method (DEM) in this study. The phase diagrams and damping contours of vibrated granular balls within the interested range of excitation parameters are obtained, which indicates two high damping granular phases (HDGPs), i.e., sloshing state and
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On the bandgap mechanism of periodic acoustic black holes J. Sound Vib. (IF 4.7) Pub Date : 2024-03-07 Jie Deng, Oriol Guasch
Acoustic black holes (ABHs) are primarily intended to eliminate the propagation of bending waves in structures although the same physical principles have been used to reduce the propagation of acoustic waves in ducts. The latter are usually referred to as sonic black holes (SBHs). ABHs (and also SBHs) only work well above a certain cut-on frequency which depends on their size compared to the incident
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Acoustic metasurface development for transmitted wavefront manipulation using a level set-based topology optimization approach J. Sound Vib. (IF 4.7) Pub Date : 2024-03-06 Jingwen Guo, Haoyi Cheng
A customized transmission-type metasurface design is developed for high-efficiency wavefront modulation by employing a level set-based topology optimization approach. The metasurface consists of periodically arranged supercells made of discrete unit cells aiming to form a precisely linear phase gradient of the transmitted wave ranging from 0 to with high transmittances. The configuration of each unit
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Reflective vortex focusing for acoustic contact-free object rotation J. Sound Vib. (IF 4.7) Pub Date : 2024-03-05 Yongdu Ruan, Jing Zhu, Qinhao Lin, Yuqi Wang, Dikui Zhou, Shaobo Wang, Chong Li, Junhui Shi, Ruimin Chen
The use of acoustic vortex waves with angular momentum is a promising means of transferring mechanical torque to an object without making any physical contact. However, the existing passive-conversion vortex lenses are unable to produce strong acoustic radiation torque. To address this issue, we propose a flat reflector sculpted by spiral grooves. It reflects and converts incident waves into vortex-focusing
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A direct multimode method for the reduction of vibration induced oscillations on force signals during “pseudo-rigid” water impact experiments J. Sound Vib. (IF 4.7) Pub Date : 2024-03-04 Alan Tassin, Florian Hulin, Nicolas Jacques
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Analysis of the vortex-induced vibration response characteristics of riser under the soft suspension evacuation condition J. Sound Vib. (IF 4.7) Pub Date : 2024-03-04 Liangjie Mao, Juxi Yan, Junlong Zhu, Yufa He
This paper establishes a nonlinear dynamic model for a suspended riser under the condition of considering realistic configurations, based on the principles of virtual work and Hamilton's variational principle. The nonlinearity of the model is manifested by considering vortex-induced vibration in the cross flow (CF) and in-line (IL) directions, as well as large deformations, taking into account the
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Compressed covariance sensing for blade tip timing measurement J. Sound Vib. (IF 4.7) Pub Date : 2024-03-04 Jiahui Cao, Zhibo Yang, Xingwu Zhang, Xuefeng Chen
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Single-tone Aerodynamic Noise Source Separation for Gas Turbines J. Sound Vib. (IF 4.7) Pub Date : 2024-03-04 Wei Cheng, Chao Song, Bicheng Bo, Shuang Chen, Mingsui Yang, Yan Wang, Baijie Qiao, Xuefeng Chen, Jun Wang, Liqi Yan
The aerodynamic noise in the gas turbines primarily originates from the pulsations generated by the air within compressors, and it is a combination of single-tone noise caused by the pressure fluctuation of blades and broadband noise generated by interactions between turbulent fluid and blades. Therefore, the separation of single-tone noise is vital in predicting the contribution of each noise source
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Multizone sound field reproduction using pressure matching with sparse equivalent source J. Sound Vib. (IF 4.7) Pub Date : 2024-03-03 Xin Wen, Haijun Wu, Weikang Jiang
Multizone sound field reproduction aims to create different acoustic environments in multiple spatial zones, allowing listeners to enjoy their individual sounds without being disturbed by sound from other zones. The conventional pressure matching method is used in practice to reproduce the desired sound field by minimizing the sound field error with a limited number of control points, whose reproduction
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Enhanced adaptive linear chirplet transform for crossing frequency trajectories J. Sound Vib. (IF 4.7) Pub Date : 2024-03-01 Cristian López, Keegan J. Moore
Time-frequency representation (TFR) is of great significance for capturing and analyzing nonlinear or nonstationary multi-component signals. The adaptive linear chirplet transform (ALCT) has proven effective for dealing with signals with frequencies that intersect, providing accurate estimations of instantaneous frequencies (IFs) for both intersecting and non-intersecting components. However, challenges
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Frequency sweep study on the generation of dual-mode second harmonics (DMSH) on an isotropic nonlinear elastic cylindrical rod by T(0,1) mode J. Sound Vib. (IF 4.7) Pub Date : 2024-02-29 Krishnadas V Kanakambaran, Krishnan Balasubramaniam
Nonlinear ultrasonic (NLU) guided wave (GW) measurements are more sensitive to microscale defects than linear measurements. This nonlinear phenomenon is helpful for early-stage damage detection in material for nondestructive evaluation (NDE) and structural health monitoring (SHM) applications. The amplitude of the higher harmonics generated in the material serves as the basis for the NLU measurement
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Modeling and analysis of beam-spring magnetically coupled bistable energy harvester for broadband vibration energy harvesting J. Sound Vib. (IF 4.7) Pub Date : 2024-02-29 Qiubo Jiang, Chuanyun Yu, Yang Zhou, Ziqian Zhao, Qiang Gao, Beibei Sun
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Experimental application of Pseudo-Equivalent Deterministic Excitation method through an impact test J. Sound Vib. (IF 4.7) Pub Date : 2024-02-29 Giulia Mazzeo, Giuseppe Petrone, Sergio De Rosa, Francesco Franco, Mohamed N. Ichchou, Olivier Bareille
The prediction of the vibrational response of a structure subjected to an aerodynamic load is fundamental for assessing preliminary structural design and addressing typical structural problems such as fatigue and structure-borne sound. In literature, there are already alternative experimental methods capable of reproducing the response to a TBL excitation without using wind tunnel facilities. One of
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Design and control of high-speed railway bridges equipped with an under-deck adaptive tensioning system J. Sound Vib. (IF 4.7) Pub Date : 2024-02-27 Arka P. Reksowardojo, Gennaro Senatore, Manfred Bischoff, Lucio Blandini
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Operational transfer path analysis based on neural network J. Sound Vib. (IF 4.7) Pub Date : 2024-02-27 Uyeup Park, Yeon June Kang
Noise, vibration, and harshness (NVH) issues induced by vibrating source to receivers are sensitive concerns in the automotive industry, significantly determining the product quality. Transfer path analysis (TPA) serves as a crucial tool in addressing these concerns. However, classical and component-based TPA methods necessitate the measurement of all transfer functions associated with the NVH phenomenon
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Experimental investigation of active local blowing on the aerodynamic noise reduction of a circular cylinder J. Sound Vib. (IF 4.7) Pub Date : 2024-02-26 Reza Maryami, Elias J.G. Arcondoulis, Jing Guo, Yu Liu
The strategic implementation of local blowing (LB) around a circular cylinder within a uniform flow has demonstrated its capacity to effectively suppress aerodynamic noise under specific blowing conditions. This study aimed to comprehend the underlying mechanism driving noise reduction through the synchronisation of far-field noise with surface pressure fluctuations, which were measured at various
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A novel time-domain approach for identifying nonlinear structural dynamical system with explicit model based on observer/Kalman filter identification method J. Sound Vib. (IF 4.7) Pub Date : 2024-02-25 Xiang Liu, Guoping Cai
In this paper, a novel time-domain method for identifying nonlinear structural dynamical system with explicit model is proposed. By exploiting the observer/Kalman filter identification (OKID) and nonlinear feedback interpretation, the nonlinear parameters of the system are estimated accurately. The effectiveness of the proposed nonlinear OKID (NOKID) method is demonstrated through three numerical examples
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Analysis of virtual inerter-based passive absorber for active chatter control J. Sound Vib. (IF 4.7) Pub Date : 2024-02-24 Hakan Dogan, Muhammet Ozsoy, Erdem Ozturk, David J. Wagg, Neil D. Sims
This paper presents a novel approach to active chatter control in milling operations using a new concept called the virtual inerter-based dynamic vibration absorber (VIDVA). While passive control methods, such as tuned mass damper (TMDs), have their merits, they may not provide optimal performance and adaptability in certain scenarios. Moreover, the realisation of an idealised inerter-based absorber
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A Bloch analysis extended to weakly disordered periodic media J. Sound Vib. (IF 4.7) Pub Date : 2024-02-24 Yilun Li, Régis Cottereau, Bing Tie
This paper develops an asymptotic method to predict the dispersion curves of a weakly disordered medium. The disordered coefficients of the original acoustic equation are related to periodic coefficients through a change of variables, assumed asymptotically close to the identity. At leading order in the amplitude of the disorder, the medium is driven by an acoustic equation with periodic coefficients
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Vibration isolation by relative resonance perceived in combination of rigid bodies and elastic beams J. Sound Vib. (IF 4.7) Pub Date : 2024-02-22 Abhigna Bhatt, Somya Ranjan Patro, Arnab Banerjee
This paper develops a novel low-frequency vibration isolation device based on rigid body dynamics called a Rigid Elastic Vibration Isolator (REVI). The REVI model is realized by coupling four elastic beams with two rigid bodies monolithically made using 3D printing. The system operates based on the vibration of the intermediate rigid bodies, which leads to the anti-resonance phenomenon at low frequencies
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On the monopolar and dipolar acoustic responses of a passive single point scatterer subjected to low-Mach-number grazing air flow J. Sound Vib. (IF 4.7) Pub Date : 2024-02-22 Yang Meng, Thomas Humbert, Vicente Romero-García, Jean-Philippe Groby, Gwénaël Gabard
The acoustic response of a passive single point scatterer under grazing flow is shown theoretically and experimentally to have both monopolar and dipolar contributions. The monopolar response is dominated by the pressure-induced flux , which is related to the specific acoustic impedance of the point scatterer as . By contrast, the main dipolar response is the pressure-induced force , which is experimentally
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Dynamic characteristics investigation of a dual rotor-casing system considering the comprehensive stiffness of the intermediate bearing J. Sound Vib. (IF 4.7) Pub Date : 2024-02-20 Kunpeng Liu, Donghua Wang, Wanyou Li, Xiujiang Shi, Qingchun Zhang
This paper focuses on the vibrational properties of a dual rotor-casing coupled system with nonlinear clearance in the intermediate bearing, considering both the oil film stiffness and Hertzian contact stiffness between rolling elements and raceways. A comprehensive stiffness model for the intermediate bearing has been developed based on elastohydrodynamic lubrication (EHL) and Hertz contact theory
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Exploit the study of the scenarios for the control of the response of single-degree-of-freedom systems with bumpers J. Sound Vib. (IF 4.7) Pub Date : 2024-02-15 Giulia Stefani, Maurizio De Angelis, Ugo Andreaus
In earthquake-prone areas, seismic isolation systems are designed to preserve structural safety and prevent occupants’ injury and properties’ damage. However, seismically isolated structures can be subject to large displacements relative to the ground under earthquakes, which lead to define two problems, the first problem concerns to excessive displacements, whereas the second problem relates to excessive
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Broadening the frequency response of a Duffing-type piezoelectric shunt by means of negative capacitance J. Sound Vib. (IF 4.7) Pub Date : 2024-02-13 J.A. Mosquera-Sánchez, O. Alfahmi, A. Erturk, C. De Marqui Jr.
Duffing oscillators are increasingly explored for vibration and noise reduction, owing to their wideband properties and rich dynamic behavior. Applications involving piezoelectric treatments typically take advantage from using negative capacitances, as their effect is similar to enhanced electromechanical coupling. This paper integrates negative capacitance to a recently introduced synthetic impedance-based
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Energy-based analysis of quadratically coupled double pendulum with internal resonances J. Sound Vib. (IF 4.7) Pub Date : 2024-02-13 Š. Dyk, J. Rendl, L. Smolík, R. Bulín
This article presents an energy-based method for examining the dynamics of an autoparametric double pendulum with quadratic coupling. The method is based on decomposing the total energy (Hamiltonian) into partial terms and studying these terms in the time domain. The article then demonstrates using this method to analyse internal resonances in various regimes, including regular periodic, quasiperiodic
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Model-free finite frequency H∞ control for active chatter suppression in turning J. Sound Vib. (IF 4.7) Pub Date : 2024-02-13 Gaowei Han, Haifeng Ma, Yang Liu, Zhanqiang Liu, Qinghua Song
Regenerative chatter is an extremely harmful phenomenon in machining, which generally results in overcut and rapid tool wear. This paper presents the design, analysis, and verification of a novel model-free finite frequency band (MFFFB) control algorithm, which is dedicated to chatter suppression of turning process. The proposed MFFFB controller is established by utilizing the reinforcement -learning
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Proportional-retarded control of a quasi-zero-stiffness vibration isolator J. Sound Vib. (IF 4.7) Pub Date : 2024-02-12 Jiazhi Cai, Qingbin Gao, Xujie Zhang
This paper explores the control design and performance analysis of an active quasi-zero-stiffness vibration isolator utilizing the proportional-retarded (PR) control architecture. The PR architecture replaces the conventional “derivative” term in the proportional-derivative (or displacement-velocity) controller with the novel “retarded (time-delayed)” term, which is a new and effective way of active
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Control of friction induced oscillation by displacement feedback with a second order filter J. Sound Vib. (IF 4.7) Pub Date : 2024-02-11 Gautam Kumar, Anindya Malas
The present work utilizes a displacement feedback control strategy to mitigate the friction driven stick-slip vibration of a mechanical system with single degree of freedom. The stick-slip vibration is primarily caused by the decrease in friction force due to the changes in velocity of the moving surface. This phenomenon, also known as Stribeck effect, can have a negative impact on the system's performance