Showing papers in "Journal of Sound and Vibration in 1995"

TL;DR: In this paper, a simple geometry is investigated systematically to determine the importance of various flow parameters on the frequency of the oscillations, and it is shown that the form of the coupling between the heat input and the unsteady flow has a crucial effect on the oscillation frequency.

TL;DR: In this paper, the dispersion curves of propagative waves in a free rail are computed by using triangular and quadrilateral finite elements of the cross-section of the waveguide.

TL;DR: In this article, the vertical dynamic behavior of a railway bogie moving on a rail is investigated for sleepers resting on an elastic foundation, and the transient interaction problem is numerically solved by use of an extended state-spacer vector approach in conjunction with a complex modal superposition for the track.

TL;DR: The IRS method is extended by obtaining the equivalent transformation based on dynamic rather than static reduction, and an iterative algorithm, based on the IRS method, is described, which provides a reduced model which reproduces a subset of the modal model of the full system.

TL;DR: In this article, a mechanical system exhibiting combined parametric excitation and clearance type nonlinearity is examined analytically and experimentally in an effort to explain complex behavior that is commonly observed in the steady state forced response of rotating machines.

TL;DR: In this article, an active damping system is proposed to reduce the threshold value of a torsional pendulum by using feedback control, thus extending the working range for vibration-free rotation.

TL;DR: A review of existing literature on the vibration analysis of thick plates is presented in this paper, where 132 publications are cited, mostly recent and nearly all in the English language, mostly based on the Mindlin theory and the modified Mindlin plate theories for laminated plates, while some papers using high order shear deformation plate theories are also included.

TL;DR: In this article, it was shown that for some non-uniform rods and beams the equation of motion can be transformed into the equation for a uniform rod or beam, and when the ends are completely fixed, the eigenvalues of the nonuniform continuum are the same as those of uniform rods or beams.

TL;DR: In this paper, a direct method of solving the wave constants for a repetitive structure with given frequency ω is developed, where the analogy between structural mechanics and optimal control theory is applied.

TL;DR: In this paper, the rotor bearing system is modelled using higher order finite elements by considering deflection, slope, shear force, bending moment with eight degrees of freedom per node.

TL;DR: In this paper, a non-Cartesian variable along with two Cartesian variables is used to describe the elastic deformation of straight beams undergoing large overall motions as well as small elastic deformations.

TL;DR: In this paper, a general method of modeling acoustic fields in stratified media which include elastic solid, fluid and porous layers is presented, and the simplicity and the versatility of the method is illustrated with several examples.

TL;DR: In this article, the authors derived approximate energy models for infinite and finite plates using three relationships; an energy balance, a loss factor damping model and an approximate energy transmission model, which is analogous to Fourier's law of heat conduction.

TL;DR: In this article, a set of governing equations for dynamic transverse motions of a cable with small sag is firstly obtained where effects of finite motions of the cable and small support motions are included.

TL;DR: In this paper, a flexibility difference method for locating damage in structures is presented, which is based on the estimation of changes in the flexibility matrix and is used to estimate the natural frequencies and mode shapes for both intact and damaged beams.

TL;DR: In this paper, the authors derived a flux conservation relation for arbitrary motion and showed that it simplifies for periodic motion, and they derived an optical theorem relating the total scattered flux for a straight-crested incident wave to the scattering amplitude in the forward direction.

TL;DR: In this paper, the forward and backward modes of thin rotating cylindrical shells are determined by using four common thin shell theories, namely, Donnell's, Flugge's, Love's and Sanders'.

TL;DR: In this paper, the natural frequencies and loss factors of a rectangular three-layered plate with a viscoelastic core layer and laminated face layers are derived for a non-symmetric plate with general anisotropy of the face layers.

TL;DR: In this article, a four-degree-of-freedom model able to capture the main phenomena which are likely to occur in the nonplanar finite dynamics of an elastic suspended cable subjected to external forcings and support motions is developed from the continuum equations.

TL;DR: In this article, a detailed study of the behavior of the flow in a system with two opposite closed side branches of equal length in a cross configuration is presented, showing that for junctions with both sharp and rounded edges the acoustic flow velocity amplitude is comparable to the main flow velocity.

TL;DR: In this article, a new lumped parameter non-linear mathematical model of the hydraulic mount is developed by simulating its decoupler switching mechanism and inertia track dynamics, and a new adaptive mount system is developed which exhibits broad bandwidth performance features up to 250 Hz.

TL;DR: In this paper, the effects of various parameters (the crack location, the crack depth, the volume fraction of fibers and the fibers orientation) upon the changes of the natural frequencies of the cantilever beam are studied.

TL;DR: In this article, the dynamic behavior of beams with simply supported boundary conditions, carrying either uniform partially distributed moving masses or forces, has been investigated, and it is shown that the inertial effect of the moving mass is of importance in the dynamic behaviour of such structures.

TL;DR: In this paper, a formulation based on Love's first approximation theory and with beam functions used as axial modal functions in the Ritz procedure is used to study the effects of boundary conditions on the free vibration characteristics for a multi-layered cylindrical shell.

TL;DR: In this paper, a measurement method to determine the source data of an acoustic two-port source in the form of a source strength vector and a scattering matrix is presented, which consists of two steps.

TL;DR: In this paper, a method for identifying (extracting) joint properties from the measured frequency response function (FRF) data is presented in order to improve the accuracy of joint identification.

TL;DR: In this paper, a piecewise linear forced oscillator with impacts is taken as a model for more complicated vibro-impacting systems and the presence of impacts makes the system discontinuous and non-linear and to study it effectively the theory of dynamical systems is used.

TL;DR: In this article, a theory concerning the dynamic response of finite elastic structures (Rayleigh beams and plates) having arbitrary end supports and under an arbitrary number of moving masses is developed, which is based on modified generalized finite integral transforms and the modified Struble's method.

TL;DR: In this article, the authors exploit the weakly non-linear character of a cracked vibrating beam for the purpose of determining crack location, depth and opening load, based on the response of a bilinear spring-mass system to excitation at two frequencies, such that the difference between the two frequencies is the resonant frequency of the system.

TL;DR: In this paper, a method for predicting damping performance of resistively shunted piezoceramics based on a variation of the modal strain energy approach has been developed.