Journal of Vibration and Acoustics: Recent submissions
Now showing items 1741-1760 of 3913
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Comprehensive Assessment of Semi-Active Vibration Suppression Including Energy Analysis
(The American Society of Mechanical Engineers (ASME), 2007)This paper presents an extensive investigation on the LR-switching method (also called the energy-recycling semi-active method). Compared with the energy-dissipative R-switching method, the LR-switching ... -
An Active Dynamic Vibration Absorber for a Hand-Held Vibro-Elastography Probe
(The American Society of Mechanical Engineers (ASME), 2007)Vibro-elastography is a new medical imaging method that identifies the mechanical properties of tissue by measuring tissue motion in response to a multi-frequency external vibration source. Previous ... -
Characterization and Variational Modeling of Ionic Polymer Transducers
(The American Society of Mechanical Engineers (ASME), 2007)Ionomeric polymers are a promising class of intelligent material which exhibit electromechanical coupling similar to that of piezoelectric bimorphs. Ionomeric polymers are much more compliant than ... -
A Generalization of Effective Mass for Selecting Free–Free Target Modes
(The American Society of Mechanical Engineers (ASME), 2007)One of the most important tasks in pretest analysis and modal survey planning is the selection of target modes. The target modes are those mode shapes that are determined to be dynamically ... -
Active Helmholtz Resonator With Positive Real Impedance
(The American Society of Mechanical Engineers (ASME), 2007)The impedance of a passive noise control device is strictly positive real, if the device is installed in noise fields with weak mean flows. Passive noise control devices are, therefore, more ... -
Active Vibration Damping Using an Inertial, Electrodynamic Actuator (DETC2005-84632)
(The American Society of Mechanical Engineers (ASME), 2007)Active vibration damping using a shunted inertial actuator is advantageous if external sensors cannot be collocated with the actuators, or these sensors would add too much weight or cost. When ... -
Coupling Vibrations in Rotating Shaft-Disk-Blades System
(The American Society of Mechanical Engineers (ASME), 2007)Applications that have coupling among shaft, disk, and blades are investigated. A shaft-disk-blades unit often seen in engineering is presented. The governing relations for shaft torsion, disk ... -
Damage Detection in Simply Supported Concrete Bridge Structure Under Moving Vehicular Loads
(The American Society of Mechanical Engineers (ASME), 2007)A method for damage detection of a simply supported concrete bridge structure in time domain is presented using the interaction forces from the moving vehicles as excitation. The vehicular loads ... -
The Influence of Same-Sign Cross-Coupled Stiffness on Rotordynamics
(The American Society of Mechanical Engineers (ASME), 2007)The following paper focuses on same-sign stiffness cross coupling from several viewpoints. First, the influence on rotordynamics is analyzed and discussed, followed by a discussion of how past ... -
A Truncated Low Approach of Intrinsic Linear and Nonlinear Damping in Thin Structures
(The American Society of Mechanical Engineers (ASME), 2007)An adaptive approach of vibrating thin structures is proposed here. The method consists in applying an equivalent adimensional damping ratio to each potential resonance. This ratio is deduced ... -
Vibration and Stability of a Shallow Arch Under a Moving Mass-Dashpot-Spring System
(The American Society of Mechanical Engineers (ASME), 2007)In this paper we study the dynamic behavior of a shallow arch under a moving load system containing two masses, a dashpot, and a suspension spring. It is assumed that the masses in the ... -
Component Mode Synthesis of a Vehicle System Model Using the Fictitious Mass Method
(The American Society of Mechanical Engineers (ASME), 2007)A new procedure for dynamic analysis of complex structures, based on the fictitious-mass component mode synthesis method, is presented. Normal modes of separate components are calculated by ... -
An Evaluation of Stability Indices Using Sensitivity Functions for Active Magnetic Bearing Supported High-Speed Rotor
(The American Society of Mechanical Engineers (ASME), 2007)In active magnetic bearing (AMB) systems, stability is the most important factor for reliable operation. Rotor positions in radial direction are regulated by four-axis control in AMB, i.e., a ... -
The Analysis of Structural–Acoustic Coupling of an Irregular Enclosure Under the Excitation of Point Force and PVDF
(The American Society of Mechanical Engineers (ASME), 2007)The physical model of this paper is an irregular enclosure with double flexible plates. The primary source is the vibration of Plate A excited by a point force. The secondary source is the ... -
Structured Vibration Modes of General Compound Planetary Gear Systems
(The American Society of Mechanical Engineers (ASME), 2007)This paper extends previous analytical models of simple, single-stage planetary gears to compound, multi-stage planetary gears. This model is then used to investigate the structured vibration mode ... -
Studies of the Performance of Multi-Unit Impact Dampers Under Stochastic Excitation
(The American Society of Mechanical Engineers (ASME), 2007)The performance of particle dampers whose behavior under broadband excitations involves internal friction and momentum transfer is a highly complex nonlinear process that is not amenable to exact ... -
Braking Impact of Normal Dither Signals
(The American Society of Mechanical Engineers (ASME), 2007)Dither control is a method of introducing high-frequency control efforts into a system to suppress a lower-frequency disturbance. One application of dither control is the suppression of automotive ... -
Vibration Mitigation Using Passive Active Tunable (PAT) System: Experimental Aspects
(The American Society of Mechanical Engineers (ASME), 2007)The objective of this paper is to test and model a single-degree-of-freedom vibration isolation system with a magnetorheological (MR) foam damper under harmonic and random excitations. The results ... -
Effect of Disabled Fastening Systems and Ballast on Vehicle Derailment
(The American Society of Mechanical Engineers (ASME), 2007)The effect of disabled fastening systems and ballast on railway vehicle derailment is investigated by developing a nonsymmetrical coupled vehicle/track model. In the model a half passenger car ... -
Modeling of Nonlinear Oscillations for Viscoelastic Moving Belt Using Generalized Hamilton’s Principle
(The American Society of Mechanical Engineers (ASME), 2007)In this paper, the nonlinear governing equations of motion for viscoelastic moving belt are established by using the generalized Hamilton’s principle for the first time. Two kinds of viscoelastic ...