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Showing papers in "Journal of Sound and Vibration in 1987"


Journal ArticleDOI
TL;DR: In this article, the coupling of longitudinal and bending vibrations of a rotating shaft, due to an open transverse surface crack, is investigated and the effects of unbalance and gravity are examined.

380 citations


Journal ArticleDOI
TL;DR: In this article, a perturbation analysis for disrodered structural systems consisting of weakly coupled component systems is presented, which allows one to obtain the localized modes of vibration of the disordered system from the modes of the individual subsystems.

282 citations


Journal ArticleDOI
TL;DR: In this article, the dependence of the wall-pressure spectrum at subconvective wavenumbers is shown to depend essentially on the rate of decrease of the source cross-spectra with wall distance (y) and on the identity of the wavenumber coefficient (eg, ω/v* or δ−1) that scales this profile.

264 citations


Journal ArticleDOI
TL;DR: In this paper, a method based on the work of Tam and Tanna (1982) for calculating the near field noise spectrum and the spatial distribution of broadband shock associated noise from supersonic jets is proposed.

197 citations


Journal ArticleDOI
TL;DR: In this article, it was shown that the use of a first-order linear beam theory results in a spurious loss of bending stiffness, and that a geometrically non-linear (at least second-order) beam theory is sufficient to account for the influence of centrifugal force on bending stiffness.

185 citations


Journal ArticleDOI
TL;DR: In this article, the steady state, vibro-impacting responses of one dimensional, harmonically excited, linear oscillators are studied by using a modern dynamical systems approach allied with numerical simulation.

162 citations


Journal ArticleDOI
TL;DR: In this paper, an analysis of the effectiveness with which active methods can be used for producing global reductions in the amplitude of the pressure fluctuations in a harmonically excited enclosed sound field is presented.

156 citations


Journal ArticleDOI
TL;DR: In this article, the dry and wet dynamic characteristics of a vertical and a horizontal cantilever square plate are discussed from the viewpoint of a linear hydroelasticity theory, where the surface piercing vertical plate is partially immersed in the fluid and the influence of submerged plate length on the resonance frequencies investigated.

149 citations


Journal ArticleDOI
S.C. Huang1, W. Soedel1
TL;DR: In this article, the authors derived the natural frequencies and modes of rotating rings without using the inextensional assumption and an attempt was made to interpret the time dependent natural modes from various viewpoints.

146 citations


Journal ArticleDOI
TL;DR: In this article, sound generation by vortex pairing in circular and elliptic cold-air jets at Mach 015-035 is investigated experimentally, with a focus on the effects of initial conditions.

137 citations


Journal ArticleDOI
TL;DR: In this article, a non-linear analytical rotor casing rub interaction simulation is solved, which yields insights as to the interrelationship between rub force histories, energy levels, rub duration, incidence separation angles, and backward whirl initiation, as well as the overall rotor orbit during successive rubs.

Journal ArticleDOI
TL;DR: In this paper, the authors used the near field technique developed by Levine to calculate the total power output from an arbitrary number of point primary and secondary sources, which is a quadratic function of the complex strengths of the secondary point sources.

Journal ArticleDOI
TL;DR: In this paper, the variational method of Schwinger is applied to reach qualitative conclusions regarding the effects of symmetrical discontinuities (change in cross-section, diaphragm of zero thickness) in acoustic waveguides.

Journal ArticleDOI
TL;DR: In this article, the exact determination of coupled bending and torsion vibration characteristics of uniform beams having single cross-sectional symmetry is presented, where the exact solutions are expressed in terms of real functions, as usual in more elementary vibration problems of beams.

Journal ArticleDOI
TL;DR: In this paper, the vibration in a flexible robot arm modeled by a moving slender prismatic beam is considered and it is found that the extending and contracting motions have destabilizing and stabilizing effects on the vibratory motions, respectively.

Journal ArticleDOI
TL;DR: In this article, it was shown that when a single mode dominates the response near optimal reductions in acoustic potential energy can be achieved by minimizing the pressure at a single sensor, provided that the source is placed at a maximum of the primary sound field.

Journal ArticleDOI
TL;DR: In this paper, the feasibility of reducing interior noise caused by advanced turbo propellers by controlling the vibration of aircraft fuselages was investigated by performing experiments in an anechoic chamber with an aircraft model test rig and apparatus.

Journal ArticleDOI
TL;DR: In this article, the influence of fluid-containing appendages on the dynamic response of multi-degree-of-freedom systems subjected to stochastic environmental loads, e.g., earthquakes, waves, or winds, is investigated.

Journal ArticleDOI
TL;DR: In this article, a cable dynamics theory is derived for travelling cables having arbitrary initial sag and arbitrary support eyelet elevations, which incorporates the effect of cable elasticity through a finite strain model.

Journal ArticleDOI
TL;DR: In this article, a general source parameter called the source descriptor is introduced, which is a function of source data only and involves both the internal vibration of the source and its mobility at the contact point.

Journal ArticleDOI
TL;DR: In this paper, a set of characteristic orthogonal polynomials in two variables is used as deflection functions to obtain the natural frequencies and mode shapes of polygonal plates by the Rayleigh-Ritz method.

Journal ArticleDOI
TL;DR: In this paper, a theory for obtaining the propagation constants of a thin uniform cylindrical shell, periodically stiffened by uniform circular frames of general cross-section, is developed.

Journal ArticleDOI
TL;DR: In this paper, a generalized decoupling approach for the analysis of two-duct as well as three-duct muffler configurations consisting of perforated elements, taking into account the actual mean flow Mach numbers in the adjoining tubes, is presented.

Journal ArticleDOI
TL;DR: In this paper, the authors considered the active control of flexural vibrations in thin beams and derived the ideal active controller for flexural wave propagation along a waveguide with particular reference to flexural vibration control of thin beams.


Journal ArticleDOI
TL;DR: The Gauss Newton method is used in setting up a two-stage iterative least squares algorithm and the usefulness of the algorithm is validated through its application to various simulated time histories from the hysteretic model.

Journal ArticleDOI
TL;DR: A review of the current state of knowledge of wheel/rail squeal and impact noise is presented in this paper, where the authors present a set of mechanisms for noise generation, sources of noise, predictive models and means for control.

Journal ArticleDOI
TL;DR: In this article, the authors analyzed the response of a rotating disc, clamped at the inside and free at the perimeter, subjected to excitation produced by stationary point loads and restrained by stationary points springs and investigated the effect of spring stiffness, number of spring and spring location on the frequency speed of the rotating disc.

Journal ArticleDOI
James F. Doyle1
TL;DR: In this paper, the impact of a scotchply laminated composite was investigated using strain gauge measurements made on an impacted plate to infer the contact force history, and experimental results for the impact were presented.

Journal ArticleDOI
TL;DR: In this paper, two methods for solving the eigenvalue problems of vibrations and stability of a beam on a variable Winkler elastic foundation are presented and compared, and it is concluded that the use of the element foundation stiffness approach yields better convergence at lower computation costs.