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Showing papers in "Journal of Sound and Vibration in 1992"


Journal ArticleDOI
TL;DR: In this article, a periodic structure consisting of identical spheres placed periodically within a host homogeneous material is investigated, and the structure is shown to have a similar structure to the one described in this paper.

932 citations


Journal ArticleDOI
TL;DR: In this article, the working principle of traveling wave ultrasonic motors is reviewed and the main phenomena are mathematically modelled, and a detailed mathematical description of the stator vibration and a first model of the contact problem is given.

198 citations


Journal ArticleDOI
TL;DR: In this article, an adaptable vibration absorber is proposed to minimize transient vibrations of rotating machines during start-up and shut-down conditions, and to adapt to changes in steady state operating speeds such as might occur in engines and pumps when load conditions vary.

190 citations


Journal ArticleDOI
TL;DR: In this paper, the authors proposed that the flow of mechanical energy through a structural/acoustic system may be modeled in a manner similar to that of flow of thermal energy/in a heat conduction problem.

168 citations


Journal ArticleDOI
TL;DR: In this paper, the authors give a short explanation of the laws of a simple impact system and elucidate the transitions to chaotic motion and illustrate the periodic and chaotic motions of more complicated systems.

165 citations


Journal ArticleDOI
TL;DR: In this paper, a linear time-invariant model with lumped mechanical and fluid elements is proposed and validated by comparing dynamic stiffness spectra predictions with experimental data over the frequency range 1-50 Hz.

154 citations


Journal ArticleDOI
TL;DR: In this paper, the frequency characteristics of vibration for a defective bearing subjected to various loadings are investigated, and the model developed by McFadden and Smith is extended to describe the bearing vibration induced by a single defect or by multiple defects located at arbitrary positions, of a bearing under diverse loadings.

152 citations


Journal ArticleDOI
TL;DR: In this article, the equations of motion for a simple rotor with a breathing crack are derived based on fracture mechanics, and the breathing crack model is further simplified to a switching crack model, the conditions for crack opening and closing are derived, and can provide useful information for crack identification.

152 citations


Journal ArticleDOI
TL;DR: In this article, the non-differentiable nature of vibro-impact dynamics can lead to breakdown of the global stable manifold theorem applicable to smooth dynamical systems, and the breakdown leads to the "shredding" of the stable manifolds.

145 citations


Journal ArticleDOI
TL;DR: In this article, a finite element method for piezoelectric materials is formulated in generalized variables and co-ordinates, and the eigenvalue problem is solved directly by treating the electrical term effectively as an extra mechanical degree of freedom.

134 citations


Journal ArticleDOI
TL;DR: In this article, the effects of moisture and temperature on the free vibration of laminated composite plates are investigated using finite element method with the quadratic isoparametric element, which takes transverse shear deformation into account.

Journal ArticleDOI
TL;DR: In this paper, a Rayleigh-Ritz approach for the study of the free vibration of systems comprised of rectangular plates is presented; the choice of the deflection functions for the component plates is simplified through the use of the concept of artificial springs being introduced at the joints between the plates and at the system boundaries; the shape functions for each component are thus those for a fully free plate.

Journal ArticleDOI
TL;DR: In this paper, the dynamics of the Timoshenko beam is recast such that the description requires information only at the end points, and a dynamic stiffness relation suitable for assembling is presented in the form of a dynamic stiff relation.

Journal ArticleDOI
TL;DR: In this paper, a new method for the analysis of high frequency vibrations is presented in which the vibration of each component of the system is represented in terms of a homogeneous random wave field.

Journal ArticleDOI
TL;DR: In this paper, the acoustic emission and initial shear layer of a cold jet issuing from an underexpanded sonic nozzle were measured where the lip thickness of the nozzle exit varied from 0.015 to 0.625 nozzle diameters.

Journal ArticleDOI
TL;DR: In this article, a method for directly estimating the physical parameter matrices, i.e., mass, stiffness and damping, of linear and non-linear structures by using measured time data is presented.

Journal ArticleDOI
H.H. Denman1
TL;DR: In this article, the authors investigated the dynamic absorption of torsional torque pulses acting on the crankshaft of a reciprocating engine by means of a set of bifilar pendula arranged symmetrically on the engine.

Journal ArticleDOI
TL;DR: In this article, the free vibration of a structure consisting of a finite circular cylindrical shell closed at one end by a circular plate is analyzed by means of continuous distributions of springs along the shell and the plate interface.

Journal ArticleDOI
TL;DR: In this paper, the free vibration problem of clamped-clamped and clampedsupported composite beams is formulated as a constrained variational problem, the constraints being imposed through Lagrange multipliers.

Journal ArticleDOI
TL;DR: A finite element analysis associated with an asymptotic solution method for the harmonic flexural vibration of viscoelastically damped unsymmetrical sandwich plates is given in this article.

Journal ArticleDOI
TL;DR: In this article, the authors present an analysis for determining the steady state response of dynamic vibration absorbers, for which both the machine and the absorber are assumed to possess a non-linear, Duffing type, stiffness.

Journal ArticleDOI
TL;DR: In this paper, the effects of random geometric perturbations of coupled beams and plates on frequency-band average vibrational power flow, and on derived coupling loss factors, are presented, and it is confirmed that the commonly employed "travelling wave" estimate of coupling loss factor generally exceeds the actual value when the average modal overlap factor is much less than unity.

Journal ArticleDOI
TL;DR: In this paper, a new model for the transmission of sound through layered systems containing porous materials is presented, and a matrix formalism for the plate/porous material/plate system is developed.


Journal ArticleDOI
TL;DR: In this paper, the chaotic dynamics of heat exchanger tubes impacting on the generally loose baffle plates is studied using an analytic model that involves delay differential equations, and the critical flow velocity for the local instability of the flexible cylinder near the static equilibrium position is obtained by assuming a harmonic solution in the discretized linearized model and solving the resulting algebraic equations.

Journal ArticleDOI
TL;DR: In this article, a screen perforated by a regular array of parallel slits with a mean bias flow through the slits was investigated, and the interaction between an incident sound wave and this mean flow converted acoustical energy into unsteady vortical motion.

Journal ArticleDOI
TL;DR: In this article, the problem of finding the optimal position of a viscous damper for a linear conservative mechanical system on the basis of an energy criterion was investigated and the results obtained are applied to homogeneous oscillating chains.

Journal ArticleDOI
TL;DR: In this paper, the authors discuss the active structural acoustic control with active/adaptive structures, including actuators, sensors, and control approaches, and show that significant progress has been made towards controlling structurally radiated noise by active or adaptive means applied directly to the structure.

Journal ArticleDOI
TL;DR: In this paper, an improved analytical procedure is introduced in the context of free vibration and stability problems of cross-ply laminated circular cylindrical shells, which is used for generating the Levy-type solutions in vibration and stabilization problems of laminated shell panels and plates when the number and order of equations are higher than those of the classical theories.