Showing papers in "Journal of Sound and Vibration in 2002"

TL;DR: The equivalence of the matrices for processing, the objective functions, the optimal basis vectors, the mean-square errors, and the asymptotic connections of the three POD methods are demonstrated and proved when the methods are used to handle the POD of discrete random vectors.

TL;DR: In this paper, a new simplified approach to modeling cracks in beams undergoing transverse vibration is presented, which uses Euler-Bernoulli beam elements with small modifications to the local flexibility in the vicinity of cracks.

TL;DR: In this paper, the dispersion equation that characterizes the relationship between the natural frequency and the wavenumber can be obtained in a simple form for multilayered rectangular plates, and the present solution includes all previous solutions, such as piezoelectric, piezomagnetic and purely elastic solutions as special cases.

TL;DR: In this article, free and forced vibration analyses for initially stressed functionally graded plates in thermal environment are presented, where material properties are assumed to be temperature dependent, and graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of the constituents.

TL;DR: In this paper, a dynamic computational model for the vehicle and track coupling system is developed by means of finite element method in numerical implementation, where the coupling system was divided into two parts; lower structure and upper structure.

TL;DR: In this paper, the authors provide insights into the physical interpretation of the proper orthogonal modes using the singular value decomposition (SVD) in the field of structural dynamics.

TL;DR: In this article, the vibration in 100 different vehicles has been measured, evaluated and assessed according to British Standard BS 6841 (1987) and International Standard ISO 2631 (1997).

TL;DR: In this article, the authors investigated parametric instability in planetary gears where fluctuating stiffness results from the changing contact conditions at the multiple tooth meshes and analyzed the operating conditions leading to the instability.

TL;DR: In this article, a newly derived algorithm to predict locations and severities of damage in structures using changes in modal characteristics is presented, which improved the accuracy of damage localization and severity estimation results in the test beam.

TL;DR: In this article, a finite element analysis for a rotating cantilever beam is presented based on a dynamic modelling method using the stretch deformation instead of the conventional axial deformation, three linear partial differential equations are derived from Hamilton's principle.

TL;DR: In this paper, the Liapunov direct method has been used to obtain the sufficient conditions of the stability of the equilibrium points of the system, and the synchronization of chaos in the two identical chaotic motions of symmetric gyros has been examined.

TL;DR: This paper introduces an original approach which explicitly takes into account the non-stationary nature of the vibration signals, and introduces a general methodology based on angular sampling and cyclic signal processing.

TL;DR: In this article, the Timoshenko beam theory is extended to short beams, taking into account the effects of shear deformation and rotational inertia, and representing the crack by a rotational spring.

TL;DR: A potential solution to the problem via the construction of a reference set parametrized by an environmental variable is demonstrated via regression and interpolation.

TL;DR: In this paper, a six order differential equation governing the apparent bending of sandwich beams is derived using Hamilton's principle, and boundary conditions for free, clamped and simply supported beams are formulated.

TL;DR: In this paper, a reassignment method is used, which can improve the concentration of the scalogram and weaken the interference terms to a certain extent; thus, the readability of the SC can be improved.

TL;DR: In this paper, the authors proposed two measures, one global and the other local, for the minimization of vibrations of structures subjected to periodic loading, which can bring about a reduction in the vibration level by moving the natural frequencies which contribute most significantly to the measures away from the driving frequencies.

TL;DR: In this paper, an adaptive-passive vibration absorber using shape memory alloys (SMA) was constructed and tested using spring elements composed of three pairs of SMA wires and one pair of steel wires.

TL;DR: A model-based identification method for multiple faults is presented, made by a least-squares fitting approach in the frequency domain, by means of the minimization of a multi-dimensional residual between the vibrations in some measuring planes on the machine and the calculated vibrations due to the acting faults.

TL;DR: In this paper, a method for producing accurate reduced order models of non-linear vibratory systems is presented based on the invariant manifold description of nonlinear normal modes (NNM).

TL;DR: In this article, a numerical study of the relationship between damage characteristics and the changes in the dynamic properties is presented, and it is found that the rotation of mode shape is a sensitive indicator of damage.

TL;DR: In this paper, the authors introduced the discrete singular convolution (DSC) algorithm for the prediction and analysis of high-frequency vibration of structures, which can be applied to both a beam and two-span plates.

TL;DR: In this article, the damping efficiency of an impact damper with granular materials in a horizontally vibrating system is investigated by means of the discrete element method, which makes it possible to consider effects of granularity such as the particle size, number of particles and friction between two particles.

TL;DR: In this paper, pipe equations for n=0 axisymmetric wave motion are derived for a fluid-filled pipe, surrounded by an infinite elastic medium which can support both longitudinal and shear waves.

TL;DR: In this article, a numerical model is developed to predict the wheel/rail dynamic interaction occurring due to excitation by wheel flats, where a relative displacement excitation is introduced between the wheel and rail that differs from the geometric form of the wheel flat.

TL;DR: In this article, a two-degree-of-freedom model is adopted where the disc and the pad are modelled as single modes connected by a sliding friction interface, and the interaction between the pad and the disc is investigated.

TL;DR: In this paper, the authors present a study on loosening of threaded fasteners subjected to dynamic shear loads, which reveals that a fastener can loosen at lower loads than previously expected due to localized slip at the contact surfaces.

TL;DR: In this paper, the unbalanced magnetic pull (UMP) in a three-phase generator under no-load, caused by dynamic and static eccentricity, is calculated theoretically, and the air-gap permeance is expressed as a Fourier series.

TL;DR: In this article, a method for damage estimation of a bridge structure using ambient vibration data caused by the traffic loadings is presented, which consists of identification of the operational modal properties and the assessment of damage locations and severities.

TL;DR: In this article, a method has been developed and implemented in the form of a MATLAB toolbox to extract parameters for an empirical disturbance model from RWA micro-vibration data.