Journal of Vibration and Acoustics: Recent submissions
Now showing items 1621-1640 of 3913
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Frequency Band Averaging of Spectral Densities for Updating Finite Element Models
(The American Society of Mechanical Engineers (ASME), 2009)The successful operation of proposed precision spacecraft will require finite element models that are accurate to much higher frequencies than the standard application. The hallmark of this ... -
Sound Radiation Control Using Multiple Adaptive Vibration Neutralizers and Hierarchical Control Schemes
(The American Society of Mechanical Engineers (ASME), 2009)Adaptable vibration neutralizers (AVNs) have become common in the literature as solutions to controlling a single but variable frequency disturbance, such as the interior sound field in a turboprop ... -
Parametric Analyses of Multispan Viscoelastic Shear Deformable Beams Under Excitation of a Moving Mass
(The American Society of Mechanical Engineers (ASME), 2009)This paper presents a numerical parametric study on design parameters of multispan viscoelastic shear deformable beams subjected to a moving mass via generalized moving least squares method ... -
On the Displacement Transmissibility of a Base Excited Viscously Damped Nonlinear Vibration Isolator
(The American Society of Mechanical Engineers (ASME), 2009)In this article vibration isolators having linear and cubic nonlinearities in stiffness and damping terms are considered under base excitation. The influence of the system parameters on the ... -
The Dynamic Analysis of an Energy Storage Flywheel System With Hybrid Bearing Support
(The American Society of Mechanical Engineers (ASME), 2009)Active magnetic bearings and superconducting magnetic bearings were used on a high-speed flywheel energy storage system; however, their wide industrial acceptance is still a challenging task because ... -
Torsional Vibration Suppression by Roller Type Centrifugal Vibration Absorbers
(The American Society of Mechanical Engineers (ASME), 2009)Centrifugal pendulum vibration absorbers (CPVA) have been used for a long time as a method to suppress torsional vibration. Recently, roller type CPVA, that has a similar characteristic but ... -
Analysis of Locally Nonlinear MDOF Systems Using Nonlinear Output Frequency Response Functions
(The American Society of Mechanical Engineers (ASME), 2009)The analysis of multidegree-of-freedom (MDOF) nonlinear systems is studied using the concept of nonlinear output frequency response functions (NOFRFs), which are a series of one-dimensional functions ... -
On Veering of Eigenvalue Loci
(The American Society of Mechanical Engineers (ASME), 2009)Eigenvalue veering is studied in the context of two simple oscillators coupled by a (presumed weak) spring, variants of which have been considered by several authors. The concept of a center ... -
Mode Evolution of Cyclic Symmetric Rotors Assembled to Flexible Bearings and Housing
(The American Society of Mechanical Engineers (ASME), 2009)This paper is to study how the vibration modes of a cyclic symmetric rotor evolve when it is assembled to a flexible housing via multiple bearing supports. Prior to assembly, the vibration ... -
On Asymptotic Analysis for Large Amplitude Nonlinear Free Vibration of Simply Supported Laminated Plates
(The American Society of Mechanical Engineers (ASME), 2009)An analytical approximation is developed for solving large amplitude nonlinear free vibration of simply supported laminated cross-ply composite thin plates. Applying Kirchhoff’s hypothesis and the ... -
Exponential Stabilization of Transverse Vibration and Trajectory Tracking for General In-Plane Motion of an Euler–Bernoulli Beam Via Two-Time Scale and Boundary Control Methods
(The American Society of Mechanical Engineers (ASME), 2009)In this paper, exponential stabilization of vibration of a flexible beam together with its general in-plane trajectory tracking is presented. Coupled beam dynamics including beam vibration ... -
Free Vibration States of an Oscillator With a Linear Time-Varying Mass
(The American Society of Mechanical Engineers (ASME), 2009)Due to its application in various dynamic systems, the free vibration behavior of a single-degree-of-freedom (SDoF) oscillator system with nonperiodic time-varying parameters has been the subject ... -
A New Rotor-Ball Bearing-Stator Coupling Dynamics Model for Whole Aero-Engine Vibration
(The American Society of Mechanical Engineers (ASME), 2009)In this paper, a new rotor-ball bearing-stator coupling system dynamics model is established for simulating the practical whole aero-engine vibration. The main characteristics of the new model ... -
Low Frequency Vibration Isolation Through an Active-on-Active Approach: Coupling Effects
(The American Society of Mechanical Engineers (ASME), 2009)The extreme sensitivity of a scanning probe microscope demands an exceptional noise cancellation device that could effectively cut off a wide range of vibration noise. Existing commercial devices, ... -
Diffractions of Elastic Waves and Stress Concentration Near a Cylindrical Nano-Inclusion Incorporating Surface Effect
(The American Society of Mechanical Engineers (ASME), 2009)The diffractions of plane compressional waves (P-wave) and shear waves (SV-wave) by a cylindrical nano-inclusion are investigated in this paper. To account for the surface/interface effect at ... -
Nondispersive Acoustic Wave Reflection on Time Reversal Mirrors
(The American Society of Mechanical Engineers (ASME), 2009)Using an integral equation approach, we investigate the reflection of focus wave modes on conventional and time reversal mirrors when the total field, incident plus reflected, satisfies on these ... -
Modeling of Fillets in Thin-Walled Beams Using Shell/Plate and Beam Finite Elements
(The American Society of Mechanical Engineers (ASME), 2009)Fillets are commonly found in thin-walled beams. Ignoring the presence of a fillet in a finite element (FE) model of a thin-walled beam can significantly change the natural frequencies and ... -
Defect Diagnosis for Rolling Element Bearings Using Acoustic Emission
(The American Society of Mechanical Engineers (ASME), 2009)Rolling element bearings are very common components in rotating machinery. Hence, condition monitoring and the detection of defects are very important for the normal and safe running of these ... -
A Combination of WKNN to Fault Diagnosis of Rolling Element Bearings
(The American Society of Mechanical Engineers (ASME), 2009)This paper presents a new method for fault diagnosis of rolling element bearings, which is developed based on a combination of weighted K nearest neighbor (WKNN) classifiers. This method uses ... -
An Efficient Method for Crack Identification in Simply Supported Euler–Bernoulli Beams
(The American Society of Mechanical Engineers (ASME), 2009)An effective crack identification procedure has been developed based on the dynamic behavior of a Euler–Bernoulli cracked beam. It is very well known that the presence of a crack in a structure ...