Showing papers in "Journal of Sound and Vibration in 2021"

TL;DR: The progress in the area of vibration-based damage identification methods over the past 10 years is reviewed to help researchers and practitioners in implementing existing damage detection algorithms effectively and developing more reliable and practical methods for civil engineering structures in the future.

TL;DR: In this article, a dual-functional metamaterial for low-frequency vibration isolation and energy harvesting is proposed, where a rolling-ball with coils into a spherical magnetic cavity is used to isolate mechanical wave and simultaneously harvest electrical energy.

TL;DR: In this article, an improved dynamic model of ACBB is proposed to consider the influences of elastic hysteresis, differential sliding friction torques, and elastohydrodynamic lubrication (EHL) rolling on the ball motion state.

TL;DR: In this article, a lever-type vibration isolator with eddy current damping (LVI-ECD) is proposed, which can broaden the isolation band by adjusting the lever ratio and improve the vibration suppression performance with EDD.

TL;DR: In this article, the nonlinear amplitude-dependent material property of fiber-reinforce composites (FRCs) and partial bolt loosening boundary conditions are taken into account, where the Rayleigh-Ritz method is employed to derive the equations of motion for FRCCSs from which the natural frequencies, damping ratios, and forced response can be obtained.

TL;DR: In this article, a unified analysis of multimode damping effects of negative stiffness dampers and inerter mechanisms when combined with a viscous damper for cable vibration control is presented.

TL;DR: In this work, Neural ODEs are re-casted as a two-level representation involving a physics-informed term, that stems from possible prior knowledge of a dynamical system, and a discrepancy term, captured by means of a feed-forward neural network, which is highly adaptive and flexible to structural monitoring problems.

TL;DR: In this article, a dual-rotor-bearing-coupling misalignment system with blade-casing rubbing is investigated based on numerical simulation and experimental measurement, and the results reveal the nonlinear vibration characteristics of the dualrotor bearing-Coupling system with local blade-case rubbing fault.

TL;DR: In this paper, a quasi-zero-stiffness (QZS) DVA is proposed for ultra-low frequency vibration absorption, and the experimental results show that good performances can be achieved by the QZS DVA under harmonic excitation, and that it notably outperforms the linear DVA for mitigating vibration under random and impulse excitations.

TL;DR: In this paper, a semi-analytical approach was developed to characterize the performance of a piezolectric bimorph cantilever with an ABH termination. But the method can be easily extended to further configurations and allows one to determine ABH harvesting capabilities when varying system parameters, in a fast and efficient way.

TL;DR: A novel multi-source fidelity sparse representation method is proposed, which can accurately realize multiple fault diagnosis of the gearbox without the prior knowledge regarding the number of fault sources.

TL;DR: The proposed ACMD approach can accurately detect wheel flats of small sizes under strong interferences for a variable-speed railway vehicle.

TL;DR: In this paper, a nonlinear static and dynamic behavior of cantilevered pipes conveying fluid is explored, with four different initial shapes being considered, and the strongly nonlinear governing equation is derived by employing the extended Lagrange equations written for dynamical systems containing non-material volumes.

TL;DR: In this article, a ternary periodic metamaterial made of concentric circular inclusions of a rigid material coated with a soft material embedded in a matrix made of a low-cost recyclable polymer is investigated using the Mindlin plate theory combined with the plane wave expansion method.

TL;DR: In this article, an optimized nonlinear acoustic metamaterial (NAM) beam is presented to realize low-frequency, broadband and highly efficient vibration reduction with the greatly reduced attached mass.

TL;DR: In this article, a two-dimensional circular acoustic black hole-based dynamic vibration absorber (2D ABH-DVA) is proposed as an auxiliary component to an existing structure for vibration suppressions.

TL;DR: In this article, the authors combine negative capacitance (NC) with inductance (L) to enlarge low-frequency bandgap width in locally resonant piezoelectric metamaterials.

TL;DR: In this paper, a novel energy absorber that essentially offers nonlinearity and a time-dependent inertial mass is presented, where the resonant frequency can be modulated dynamically by using the angular velocity to trigger a controlled target energy transfer (TET).

TL;DR: In this article, a bottom-up topology optimization approach is established to systematically design the acoustic Dirac cones with customized double, triple and quadruple degeneracies at different wavelength scales.

TL;DR: In this paper, a lattice Boltzmann method was employed to study the aeroacoustics and aerodynamics of airfoils equipped with leading edge treatments, namely the porous leading edge and leading edge serrations.

TL;DR: In this paper, a multi-stable piezoelectric energy harvesters (MPEH) with magnetic interaction is modeled as point dipole with the path integral approach, and the mathematic model of the MPEH is derived by taking into account the geometric nonlinearity of the beam.

TL;DR: In this paper, a metamaterial whose unit cell consists of a dynamic vibration absorber with negative stiffness (NSDVA) was proposed, which exhibits a quasi-static bandgap and negative effective stiffness due to the presence of a negative stiffness element.

TL;DR: In this article, a shape memory alloy tuned mass damper inerter (SMA-TMDI) was introduced for the control of linked-single degree of freedom (SDOF) systems subjected to base excitation.

TL;DR: A generalized dispersive mode decomposition (GDMD) method is proposed to accurately estimate GDs and fully separate overlapped modes of dispersive signals and a high-quality TF distribution can be constructed to clearly reveal the TF pattern of a multimodal dispersive signal.

TL;DR: Comparisons between the presented model (PM) and conventional model (CM) indicate that dynamic responses are sensitive to the longitudinal coupling effects and slab in-plane vibration which should be paid adequate attention for more accurate evaluations on train-slab track interactions.

TL;DR: In this paper, a realistic theory is proposed considering the damping effect of the test vehicle, which was not well studied previously, and closed-form solutions are firstly derived for both the vehicle and contact point responses, with their transmissibility discussed.

TL;DR: A geometrically nonlinear forced vibration analysis of circular cylindrical sandwich shells with open/closed cellular core using higher-order thickness and shear deformation theory is presented in this paper.

TL;DR: In this article, a general model for a combination of porosity (of functional type) and hyperelasticity using the Mooney-Rivlin strain energy density is obtained.

TL;DR: In this paper, simultaneous optimization of the geometric parameters of the acoustic black hole (ABH) profile and the topology of the damping layer covering the ABH area is investigated based on the former study of wave focalization.

TL;DR: A novel sparse dictionary design method is proposed based on edited cepstrum to improve the precision of feature extraction, and the impulse response function is selected as sparse atom, which better reflects the structure and inherent modal characteristics of the faulty bearing.