Journal of Vibration and Acoustics: Recent submissions
Now showing items 1761-1780 of 3913
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Inferring Viscoelastic Dynamic Material Properties From Finite Element and Experimental Studies of Beams With Constrained Layer Damping
(The American Society of Mechanical Engineers (ASME), 2007)Viscoelastic materials are often used to add damping to metal structures, usually via the constrained layer damping method. The added damping depends strongly on material temperature and frequency, ... -
An Adaptive Time–Frequency Representation and its Fast Implementation
(The American Society of Mechanical Engineers (ASME), 2007)This paper presents a fast adaptive time–frequency analysis method for dealing with the signals consisting of stationary components and transients, which are encountered very often in practice. ... -
Transfer Functions of One-Dimensional Distributed Parameter Systems by Wave Approach
(The American Society of Mechanical Engineers (ASME), 2007)An alternative analysis technique, which does not require eigensolutions as a priori, for the dynamic response solutions, in terms of the transfer function, of one-dimensional distributed parameter ... -
Investigating the Effects of Fibrous Material Compression on the Acoustical Behavior of Absorption and Barrier Materials
(The American Society of Mechanical Engineers (ASME), 2007)This paper discusses the effects of compression on acoustical performance of fibrous materials. A finite element model is used to predict the absorption coefficient and transmission loss of ... -
The Analytical Solution and The Existence Condition of Dry Friction Backward Whirl in Rotor-to-Stator Contact Systems
(The American Society of Mechanical Engineers (ASME), 2007)Dry friction backward whirl is a self-excited vibration state in rotor-to-stator contact systems, by which the rotor is in continuous contact with the stator, slipping continuously on the contact ... -
Predicting the Optical Performance of the Space Interferometry Mission Using a Modeling, Testing, and Validation Methodology
(The American Society of Mechanical Engineers (ASME), 2007)This paper presents the modeling, testing, and validation methodologies developed to predict the optical performance of the Space Interferometry Mission (SIM) at the Jet Propulsion Laboratory ... -
Mode Interactions and Sound Power Transmission Loss of Expansion Chambers
(The American Society of Mechanical Engineers (ASME), 2007)The mode interactions and the sound transmission loss across the expansion chambers with and without tapered sections are studied by the finite element method in the present investigation. Results ... -
Structure Flexibility Impacts on Robust Active Vibration Isolation Using Mixed Sensitivity Optimization
(The American Society of Mechanical Engineers (ASME), 2007)Active vibration isolation from an arbitrarily, structurally complex receiver is considered with respect to the impacts of structure flexibility on the open- and closed-loop system characteristics. ... -
Prediction of Dry-Friction Whirl and Whip Between a Rotor and a Stator
(The American Society of Mechanical Engineers (ASME), 2007)This paper addresses recent test results for dry-friction whip and whirl. Authors of these publications suggest that predictions from Black’s 1968 paper (J. Mech. Eng. Sci., 10(1), pp. 1–12) ... -
Surface Friction Guiding for Reduced High-Frequency Lateral Vibration of Moving Media
(The American Society of Mechanical Engineers (ASME), 2007)The free and forced vibration of a moving medium is examined in an application where distributed friction guiding is used to control lateral position passively. Subambient pressure features ... -
Vibrations of Complete Spherical Shells With Imperfections
(The American Society of Mechanical Engineers (ASME), 2007)Numerous theoretical investigations on the natural frequencies for complete spherical shells have been reported over the past four decades. However, attempts at correlating the theoretical results ... -
Structural-Acoustic Optimization of Sandwich Panels
(The American Society of Mechanical Engineers (ASME), 2007)Sandwich panels comprising face sheets enclosing a core are increasingly common structural elements in a variety of applications, including aircraft fuselages, flight surfaces, vehicle panels, ... -
Vibratory Characteristics of Axially-Loaded Timoshenko Beams With Arbitrary Number of Cracks
(The American Society of Mechanical Engineers (ASME), 2007)A simple and efficient analytical approach is presented to determine the vibrational frequencies and mode shape functions of axially-loaded Timoshenko beams with an arbitrary number of cracks. ... -
Reconstruction and Separation in a Semi-Free Field by Using the Distributed Source Boundary Point Method-Based Nearfield Acoustic Holography
(The American Society of Mechanical Engineers (ASME), 2007)In a semi-free field, the acoustic field is composed of two components: the direct sound and the reflected sound. Because it is difficult to separate the direct sound from the acoustic field, ... -
A System Identification Technique Using Bias Current Perturbation for Determining the Effective Rotor Origin of Active Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2007)Locating the effective rotor origin of an active magnetic bearing (AMB) is an important step toward accurate characterization of the bearing air gaps for field tuning, performance analyses, and ... -
Vibration of Nonhomogeneous Orthotropic Elliptic and Circular Plates With Variable Thickness
(The American Society of Mechanical Engineers (ASME), 2007)In this paper, study of nonhomogeneity as well as variable thickness in elliptic and circular orthotropic plates is undertaken. Nonhomogeneity of plate material is assumed to be a quadratic ... -
A Combinatorial Optimization Problem for High Order PODs with Few Sensors
(The American Society of Mechanical Engineers (ASME), 2007)Experimental characterization of high dimensional dynamic systems sometimes uses the proper orthogonal decomposition (POD). If there are many measurement locations and relatively fewer sensors, then ... -
Discussion: “Improved Concept and Model of Eddy Current Damper” (Sodano, H. A., Bae, J.-S., Inman, D. J., and Belvin, W. K., 2006, ASME J. Vib. Acoust., 128 , pp. 234–302)
(The American Society of Mechanical Engineers (ASME), 2007)In their paper 1, the authors investigate the vibration damping of a beam by means of a permanent magnet whose axis is perpendicular to the vibration direction. They acknowledge the fact that ... -
Arbitrary Periodic Motions and Grazing Switching of a Forced Piecewise Linear, Impacting Oscillator
(The American Society of Mechanical Engineers (ASME), 2007)The grazing bifurcation and periodic motion switching of the harmonically forced, piecewise linear system with impacting are investigated. The generic mappings relative to the discontinuous boundaries ... -
Snapping of a Shallow Arch With Harmonic Excitation at One End
(The American Society of Mechanical Engineers (ASME), 2007)In this paper we demonstrate both numerically and experimentally that it is possible to make a pinned-pinned shallow arch snap to and remain vibrating on the other side by harmonic excitation ...