Journal of Vibration and Acoustics: Recent submissions
Now showing items 1601-1620 of 3913
-
Nonlinear Oscillation of a Rotor-AMB System With Time Varying Stiffness and Multi-External Excitations
(The American Society of Mechanical Engineers (ASME), 2009)The rotor-active magnetic bearing system subjected to a periodically time-varying stiffness having quadratic and cubic nonlinearities is studied and solved. The multiple time scale technique is ... -
Periodic Motions With Impacting Chatter and Stick in a Gear Transmission System
(The American Society of Mechanical Engineers (ASME), 2009)In this paper, an impact model with possible stick between the two gears is proposed for gear transmission systems, which includes the piecewise backlash model and the traditional impact model ... -
An Efficient Galerkin BEM to Compute High Acoustic Eigenfrequencies
(The American Society of Mechanical Engineers (ASME), 2009)An efficient numerical method, using integral equations, is developed to calculate precisely the acoustic eigenfrequencies and their associated eigenvectors, located in a given high frequency ... -
Self-Powered Magnetorheological Dampers
(The American Society of Mechanical Engineers (ASME), 2009)This study addresses the feasibility and effectiveness of a self-powered magnetorheological (MR) damper using in-situ energy harvested from the vibration and shock environment in which it is ... -
Theoretical Modeling of TLD With Different Tank Geometries Using Linear Long Wave Theory
(The American Society of Mechanical Engineers (ASME), 2009)This study focuses on the modeling of tuned liquid dampers (TLDs) with triangular-bottom, sloped-bottom, parabolic-bottom, and flat-bottom tanks using the linear long wave theory. The energy ... -
Vibration of the Rigid Rotor Supported by a Repulsive Magnetic Bearing (Influences of Magnetic Anisotropies of Magnets)
(The American Society of Mechanical Engineers (ASME), 2009)This study focuses on the vibration of the rotor supported by a repulsive-type passive magnetic bearing. It evaluates the restoring force of a repulsive magnetic bearing numerically by considering ... -
Vibration Characteristics of a Box-Type Structure
(The American Society of Mechanical Engineers (ASME), 2009)This paper is concerned with the understanding of vibration characteristics of a box-type structure using the finite element method as a tool. We found that mode shapes of the box structure ... -
Modes of Wave Propagation and Dispersion Relations in a Cylindrical Shell
(The American Society of Mechanical Engineers (ASME), 2009)This paper reinvestigates the classic problem of the dispersion relations of a cylindrical shell by obtaining a complete set of analytical solutions, based on Flügge’s theory, for all orders ... -
Experimental Evaluation of a Unified Time-Scale-Frequency Technique for Bearing Defect Feature Extraction
(The American Society of Mechanical Engineers (ASME), 2009)A systematic experimental study is presented in this paper on evaluating the effectiveness of a unified, multidomain algorithm for defect feature extraction in bearing condition monitoring and ... -
Effective and Robust Vibration Control Using Series Multiple Tuned-Mass Dampers
(The American Society of Mechanical Engineers (ASME), 2009)Various types of tuned-mass dampers (TMDs), or dynamic vibration absorbers, have been proposed in literature, including the classic TMD, (parallel) multiple TMDs, multidegree-of-freedom (DOF) TMD, ... -
A Statistical Measure for Wavelet Based Singularity Detection
(The American Society of Mechanical Engineers (ASME), 2009)This paper presents a statistical measure for the identification of the presence, the location, and the calibration of the strength of singularity in a signal or in any of its derivatives in ... -
Vibrations of a Beam in Variable Contact With a Flat Surface
(The American Society of Mechanical Engineers (ASME), 2009)We study small vibrations of cantilever beams contacting a rigid surface. We study two cases: the first is a beam that sags onto the ground due to gravity, and the second is a beam that ... -
Optimal Positioning and Control of a MR-Squeeze Film Damper for Reducing Unbalanced Vibrations in a Rotor System With Multiple Masses
(The American Society of Mechanical Engineers (ASME), 2009)This paper presents a new semi-active control scheme that can reduce the unbalance responses in a flexible rotor system with multiple masses (i.e., disks) using a magnetorheological fluid based ... -
Imbalance Vibration Suppression of a Supercritical Shaft via an Automatic Balancing Device
(The American Society of Mechanical Engineers (ASME), 2009)This research explores the use of automatic balancing (AB) devices or “autobalancers” for imbalance vibration suppression of flexible shafts operating at supercritical speeds. Essentially, an ... -
SEA Coupling Loss Factors of Complex Vibro-Acoustic Systems
(The American Society of Mechanical Engineers (ASME), 2009)Reliability of statistical energy analysis (SEA) models depends on good estimates of coupling loss factors (CLFs), modal densities, and damping loss factors. Statistical modal energy distribution ... -
Vibration Suppression of Rotating Machinery Utilizing an Automatic Ball Balancer and Discontinuous Spring Characteristics
(The American Society of Mechanical Engineers (ASME), 2009)Automatic ball balancer is a balancing device where two balls inside a hollow rotor move to optimal rest positions automatically to eliminate unbalance. As a result, vibrations are suppressed ... -
Automated Operating Mode Classification for Online Monitoring Systems
(The American Society of Mechanical Engineers (ASME), 2009)Transient operation of machinery can greatly complicate the task of vibration-based online condition monitoring. Because the operating mode of a machine affects the physical response and hence ... -
Experimental Study on the Nonlinear Vibrations and n× Amplitudes of a Rotor With a Transverse Crack
(The American Society of Mechanical Engineers (ASME), 2009)In this paper, the nonlinear response of a rotor system containing a transverse crack is analyzed experimentally in order to propose a nondestructive detection of cracks in the rotor. More ... -
Finite Element Modeling and Analysis of Friction Wedge Damping During Suspension Bounce Modes
(The American Society of Mechanical Engineers (ASME), 2009)A two-dimensional finite element model (2D FEM) has been developed to improve the modeling and understanding of the friction damping characteristics of freight bogie suspensions. The specific ... -
Estimating Damping Parameters in Multi-Degree-of-Freedom Vibration Systems by Balancing Energy
(The American Society of Mechanical Engineers (ASME), 2009)A method of estimating damping parameters for multi-degree-of-freedom vibration systems is outlined, involving a balance of dissipated and supplied energies over a cycle of periodic vibration. The ...