Showing papers in "Journal of Sound and Vibration in 2014"

TL;DR: In this article, a chiral-lattice-based EMM beam with multiple embedded local resonators is suggested to achieve broadband vibration suppression without sacrificing its loadbearing capacity, and the required unit number of the resonator in each section is quantitatively determined for complete vibration attenuation.

TL;DR: In this paper, a review of modeling approaches used for nonlinear crack-wave interactions is presented, including models of crack-induced elastic, thermo-elastic and dissipative nonlinearities.

TL;DR: In this paper, a nonlinear isolator with Euler buckled beams as negative stiffness corrector was used to determine the primary resonance response for the single degree of freedom (SDOF) nonlinear system composed by a loaded mass and the nonlinear isolateator.

TL;DR: In this paper, a vibration isolator using a novel magnetic spring with negative stiffness (MS-NS) is proposed, which is composed of three cuboidal magnets configured in repulsive interaction, and an analytical expression of the stiffness of the MS-NS is derived by using the magnetic charge model.

TL;DR: In this article, the authors present a broad overview of the literature in the field of input reconstruction of mechanical systems and classify them into three categories: direct, regularization, and statistical.

TL;DR: In this article, a fatigue crack detection technique using nonlinear ultrasonic wave modulation is presented, in which a signal processing technique combining linear response subtraction (LRS) and synchronous demodulation (SD) is developed specifically to extract the crack-induced spectral sidebands.

TL;DR: In this article, the influence of inerter position on the natural frequencies of vibration systems is investigated and the efficiency of interter in reducing the largest natural frequencies is verified by simulating a six-degree-of-freedom system, where a reduction of more than 47 percent is obtained by employing only five inerters.

TL;DR: In this paper, the authors investigated passive vehicle suspensions with inerters by considering multiple performance requirements including ride comfort, suspension deflection and tyre grip, where suspensions deflection performance is novelly considered which is formulated as a part of objective functions and a constraint separately.

TL;DR: In this paper, a novel three-dimensional autonomous system, whose dynamics support periodic and chaotic butterfly attractors as certain parameters vary, is introduced, and adaptive control laws are derived to achieve global chaotic synchronization of the chaotic system with unknown parameters.

TL;DR: In this article, the dynamic and energy properties of a multi-stable bimorph cantilever energy harvester with magnetic attraction effect have been investigated and the mechanism that governs the formation of this multi-stability is thoroughly identified and examined thorough a bifurcation analysis performed on the system's equilibrium solutions.

TL;DR: In this paper, an isolation platform with n-layer scissor-like truss structure is investigated to explore novel design of passive/semi-active/active vibration control/isolation systems and to exploit potential nonlinear benefits in vibration suppression.

TL;DR: In this paper, a dynamic nonlinear finite element model of a rolling element bearing with an outer raceway defect was numerically solved using the explicit dynamics finite element software package, LS-DYNA.

TL;DR: In this article, machine learning algorithms based on Artificial Neural Networks (ANNs) including an Auto-Associative Neural Network (AANN) based on a standard ANN form and a novel approach to auto-association with Radial Basis Functions (RBFs) networks are used, which are optimised for fast and efficient runs.

TL;DR: In this article, a vibration isolator consisting of two oblique springs and one vertical spring is designed to achieve quasi-zero stiffness at the equilibrium position, which attenuate external disturbance more at low frequencies, when compared with linear isolators.

TL;DR: In this article, a new fault detection method combines the fast dynamic time warping (Fast DTW) as well as the correlated kurtosis (CK) techniques to characterize the local gear fault, and identify the corresponding faulty gear and its position.

TL;DR: In this paper, the nonlinear free vibration of carbon nanotubes/fiber/polymer composite (CNTFPC) multi-scale plates with surface-bonded piezoelectric actuators is studied.

TL;DR: In this paper, a scheme to reduce the acceleration of the sprung mass, used in combination with sliding mode control, is proposed to estimate the effects of the uncertain, nonlinear spring and damper, load variation and the unknown road disturbance.

TL;DR: In this paper, the condition for the occurrence of stochastic resonance is defined conventionally by the Kramers rate, and the modelling of a theoretical nonlinear oscillator driven by a small periodic modulating excitation and a harvestable noise source, which, together satisfy this condition, is developed.

TL;DR: The singular boundary method (SBM) as discussed by the authors is a strong-form collocation boundary discretization technique using the singular fundamental solutions, which is mathematically simple, easy-to-program, meshless and introduces the concept of source intensity factors (SIFs) to eliminate the singularities of the fundamental solutions.

TL;DR: In this article, an M-shaped nonlinear bent beam with clamped end conditions is presented and investigated for bandwidth enhancement under base excitation, which can be used in piezoelectric and electromagnetic energy harvesting as well as their hybrid combinations.

TL;DR: In this paper, the authors investigated the acoustic scattering due to the presence of a flat plate in the vicinity of a turbulent subsonic jet and found that low-frequency radiation is due to evanescent hydrodynamic wavepackets in the jet near field.

TL;DR: In this paper, the Teager energy operator and wavelet transform are combined to produce a new modal curvature, termed as the TEAGO operator-wavelet transform (TEAGO-WT).

TL;DR: In this paper, a nonlinear energy sink for energy harvesting using nonlinear vibration absorption and nonlinear nonlinearity is presented. But the experimental identification is conducted to determine several key parameters and relationships, and a computer simulation is carried out to investigate the apparatus's performance under transient responses in terms of vibration absorption.

TL;DR: In this paper, the effect of ultrasonically assisted drilling (UAD) on carbon fiber-reinforced plastics was investigated using a 3 mm drill bit and an extensive experimental study was conducted using ∅3 mm drill and tool wear.

TL;DR: In this paper, a multi-objective control method with wheelbase preview for active vehicle suspension is presented, and the solution is derived by iterative linear matrix inequality (ILMI) and cone complementarity linearization (CCL) algorithms.

TL;DR: In this paper, an explicit expression of the natural frequencies through crack parameters is derived as a modification of the Rayleigh quotient for the multiple cracked beams that differ from the earlier ones by including nonlinear terms with respect to crack severity.

TL;DR: In this article, numerical and experimental investigations of the dynamics of micromachined shallow arches (initially curved microbeams) and the possibility of using their dynamic snap-through motion for filtering purposes are presented.

TL;DR: In this paper, an optimal design for a system comprising a nonlinear energy sink (NES) and a piezoelectric-based vibration energy harvester attached to a free-free beam under shock excitation is presented.

TL;DR: In this article, an active pneumatic vibration isolation system using negative stiffness structures (NSS) for a vehicle seat in low excitation frequencies is proposed, which is named as an active system with NSS.

TL;DR: In this paper, the dynamic solutions for forced vibrations of Timoshenko beams in a systematical manner are presented, where the Laplace transform method is applied in the present study and corresponding Green's functions are presented explicitly for beams with various boundaries.