Journal of Vibration and Acoustics: Recent submissions
Now showing items 3781-3800 of 3913
-
The Condition Monitoring of Rolling Element Bearings Using Vibration Analysis
(The American Society of Mechanical Engineers (ASME), 1984)A brief review on techniques of machine condition monitoring is presented followed by a description and results of a study involving the monitoring of vibration signatures of several rolling ... -
Discussion: “A Rapid Approach for Calculating the Damped Eigenvalues of a Gas Turbine on a Minicomputer: Theory” (Gunter, E. J., Humphris, R. R., and Springer, H., 1984, ASME J. Vibr. Acoust. Stress Rel. Des., 106, pp. 239–249)
(The American Society of Mechanical Engineers (ASME), 1984) -
An Electret Loudspeaker for Active Acoustic Systems
(The American Society of Mechanical Engineers (ASME), 1984)A push-pull electret loudspeaker has been developed which can be used for an active acoustic wall lining. -
Vibration Modes of Packeted Bladed Disks
(The American Society of Mechanical Engineers (ASME), 1984)This paper presents the results of investigating the vibrational behavior of turbine blades when grouped into packets. Two methods of analysis based on substructuring via receptance coupling have ... -
Vibrations of Bladed-Disk Assemblies—A Selected Survey (Survey Paper)
(The American Society of Mechanical Engineers (ASME), 1984)The progress made in the decade 1973–1983 in the area of vibration of jet engine blades is surveyed. The purpose of the survey is to provide a general review of recent progress and the ... -
Generalized Methods of Vibration Analysis
(The American Society of Mechanical Engineers (ASME), 1984) -
Modified Shielding Jet Model for Twin-Jet Shielding Analysis
(The American Society of Mechanical Engineers (ASME), 1984)An analytical model to estimate the shielding of noise emitted from a point noise source has been developed assuming the shielding jet to be a cylinder of constant radius with uniform flow ... -
Aerodynamic Far Field Noise in Idling Circular Sawblades
(The American Society of Mechanical Engineers (ASME), 1984)The acoustic pressure radiated to the far field from dipole sources at the rim of a rotating circular sawblade is investigated theoretically and experimentally. Scattering from the sawblade ... -
Vortex Shedding: The Source of Noise and Vibration in Idling Circular Saws
(The American Society of Mechanical Engineers (ASME), 1984)Vortices separating from the edges of cutting teeth were shown to be the dominant source of pressure fluctuation and hence noise in circular saws. Measurement of pressure on the surfaces of ... -
Analysis of the Effect of Heated Jet Flow on the Far Field Radiation From a Noise Source
(The American Society of Mechanical Engineers (ASME), 1984)One factor which influences the radiation of jet noise is the interaction with the heated moving flow of a parallel twin jet. Because of the temperature and flow discontinuity between the jet ... -
Active Impedance Control for One-Dimensional Sound
(The American Society of Mechanical Engineers (ASME), 1984)Generalizing the concept of active sound absorption, a system for active impedance control has been developed, so far for plane waves at normal incidence. The active reflector is a loudspeaker ... -
Finite Element-Integral Acoustic Simulation of JT15D Turbofan Engine
(The American Society of Mechanical Engineers (ASME), 1984)An iterative finite element-integral technique is used to predict the sound field radiated from the JT15D turbofan inlet. The sound field is divided into two regions: the sound field within ... -
A Study of Active Control of Noise in Ducts
(The American Society of Mechanical Engineers (ASME), 1984) -
Application of the BIE Method to Sound Radiation Problems Using an Isoparametric Element
(The American Society of Mechanical Engineers (ASME), 1984)This paper discusses the application of the Boundary Integral Equation method for the numerical solution of radiation problems governed by Helmholtz’s equation. In particular, we introduce an ... -
Effects of Surface Irregularity on Turbulent Boundary Layer Wall Pressure Fluctuations
(The American Society of Mechanical Engineers (ASME), 1984)Measurements were made of the mean velocity profiles and wall pressure field upstream and downstream of the flow over both a backward-facing and forward-facing step. For each configuration the ... -
Excitation of Plates and Hydrofoils by Trailing Edge Flows
(The American Society of Mechanical Engineers (ASME), 1984)The flow-induced vibration of lifting surfaces is discussed from the perspective of the properties of the various flow regimes that exist on the surfaces. Depending on the Reynolds number and ... -
Long-Range Acoustic Scattering by Surface Inhomogeneities Beneath a Turbulent Boundary Layer
(The American Society of Mechanical Engineers (ASME), 1984)Low-frequency turbulent boundary layer eddies inject a power P s into the elastic structure over which the boundary layer is formed which generally greatly exceeds the acoustic power P a ... -
The Influence of Surface Compliance on the Production of Sound by a Turbulent Boundary Layer
(The American Society of Mechanical Engineers (ASME), 1984)The theory of aerodynamic sound in the form developed by Ffowcs-Williams and Hawkings [15] is applied to investigate the production of sound by turbulent boundary layer flow over a thin, ... -
An Active Sound Absorber With Porous Plate
(The American Society of Mechanical Engineers (ASME), 1984)An active equivalent of the λ/4 resonance absorber with a porous plate or foil of flow resistance ρc is described. The porous layer is backed by a loudspeaker driven such that zero sound ... -
Modification Caused by Compliant Layers and Blankets in the Pressure Field Induced on a Boundary
(The American Society of Mechanical Engineers (ASME), 1984)A primitive analytical tool to assess the modification in the response caused by introducing various combinations of flexible layers on panels is proposed and developed. The tool is primitive ...