Journal of Vibration and Acoustics: Recent submissions
Now showing items 2321-2340 of 3913
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Control of Wave Propagation in Periodic Composite Rods Using Shape Memory Inserts
(The American Society of Mechanical Engineers (ASME), 2000)Longitudinal wave propagation is controlled using shape memory inserts placed periodically along rods. The inserts act as sources of impedance mismatch with tunable characteristics. Such characteristics ... -
Noise Reduction Using Finite-Length Flexible Segments
(The American Society of Mechanical Engineers (ASME), 2000)In this work, the reduction of acoustic noise in piping systems through the installation of finite flexible segments is explored. A mathematical model describing the relevant parameters is ... -
High-Frequency Acoustic Emission Generated by Underwater Explosion with Cylindrical Symmetry
(The American Society of Mechanical Engineers (ASME), 2000)A high-frequency part of the acoustic spectrum excited by an underwater explosion with cylindrical symmetry is investigated theoretically. It is assumed that the liquid is inviscid, the surface ... -
The Effects of Converging and Diverging Axial Taper on the Rotordynamic Coefficients of Liquid Annular Pressure Seals: Theory Versus Experiment
(The American Society of Mechanical Engineers (ASME), 2000)Experimental results are compared to predictions for turbulent flow, short (D=76.2 mm,L/D=.17), smooth annular seals with converging and diverging axial taper. Results are presented for four ... -
Three-Dimensional Vibrations of Thick, Circular Rings with Isosceles Trapezoidal and Triangular Cross-Sections
(The American Society of Mechanical Engineers (ASME), 2000)A three-dimensional (3-D) method of analysis is presented for determining the free vibration frequencies and mode shapes of thick, circular rings with isosceles trapezoidal and triangular ... -
A Relationship Between Defective Systems and Unit-Rank Modification of Classical Damping
(The American Society of Mechanical Engineers (ASME), 2000)A common assumption within the mathematical modeling of vibrating elastomechanical system is that the damping matrix can be diagonalized by the modal matrix of the undamped model. These damping ... -
A Frequency and Curvature Based Experimental Method for Locating Damage in Structures
(The American Society of Mechanical Engineers (ASME), 2000)This paper presents a method for locating structural damage using experimental vibration data. The method uses measured frequency response functions to obtain displacement as a function of ... -
Experimental Application of Feedback Control to Localize Vibration
(The American Society of Mechanical Engineers (ASME), 2000)The purpose of this study is to apply feedback control to a physical system in order to localize structural vibration. This is accomplished using an eigenstructure placement technique called ... -
Free Vibration of Orthotropic Skew Plates
(The American Society of Mechanical Engineers (ASME), 2000)The main purpose of this paper is to develop a fast converging semianalytical method for assessing the vibration effect on thin orthotropic skew (or parallelogram/oblique) plates. Since the ... -
Reduced Weight Design of a Flexible Rotor with Ball Bearing Stiffness Characteristics Varying with Rotational Speed and Load
(The American Society of Mechanical Engineers (ASME), 2000)This paper presents an effective design approach for reducing the weight of a flexible rotor in ball bearings with rotational speed and load dependent stiffness characteristics under constraints ... -
Energetics and Stability of Translating Media with an Arbitrarily Varying Length
(The American Society of Mechanical Engineers (ASME), 2000)The linear dynamics of a class of translating media with an arbitrarily varying length is investigated. The tension in the media arising from their longitudinal accelerations is incorporated. ... -
Dynamic Analysis of a Piezothermoelastic Resonator with Various Shapes
(The American Society of Mechanical Engineers (ASME), 2000)The resonator is stimulated by piezoelectric ceramics to produce oscillations with frequencies in the ultrasonic region for the ultrasonic motor application. The steady-state temperature rise due ... -
Effect of Shaft Flexibility on Control System Parameters
(The American Society of Mechanical Engineers (ASME), 2000)A dynamic system consisting of a servomotor, elastic shaft and inertial load, which may represent a disk or a robot arm, is chosen as an elastic control system. Equations of the torsional ... -
Propagation and Localization of Longitudinal Thermoelastic Waves in Layered Structures
(The American Society of Mechanical Engineers (ASME), 2000)Based on the generalized dynamical theory of thermoelasticity, a transfer matrix formulation including the second sound effect is developed for longitudinal wave component propagation in a ... -
Vibration Control of Beams Using Electro-Magnetic Compressional Damping Treatment
(The American Society of Mechanical Engineers (ASME), 2000)A new class of structural damping treatments is introduced. This class is the electro-magnetic damping treatment (EMDT) which relies in its operation on a viscoelastic damping layer sandwiched ... -
Acoustic Radiation by Point- or Line-Excited Laminated Plates
(The American Society of Mechanical Engineers (ASME), 2000)This paper presents an elasticity theory solution for computation of acoustic radiation by a point- or line-excited fluid-loaded laminated plate, which may consist of a stack of an arbitrary ... -
Linear Dynamics of an Elastic Beam Under Moving Loads
(The American Society of Mechanical Engineers (ASME), 2000)The dynamic response of an Euler-Bernoulli beam under moving loads is studied by mode superposition. The inertial effects of the moving load are included in the analysis. The time-dependent ... -
Wavenumber-Harmonic Analysis of a Periodically Supported Beam Under the Action of a Convected Loading
(The American Society of Mechanical Engineers (ASME), 2000)The vibro-acoustic response of an infinite, fluid-loaded and periodically supported Timoshenko beam under a convected harmonic loading has been obtained in a mathematical form. Instead of considering ... -
Optimized Realization of Fault-Tolerant Heteropolar Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2000)Flux coupling in heteropolar magnetic bearings permits remaining active coils to assume actions of failed coils to produce force resultants identical to the un-failed actuator. This fault-tolerant ... -
Active Control of Low Frequency Modes in an Aircraft Fuselage Using Spatially Weighted Arrays
(The American Society of Mechanical Engineers (ASME), 2000)Acoustic enclosures such as aircraft cabins often display lightly damped modal behavior at low frequencies where passive treatments are impractical due to mass and volume constraints. This work ...