Journal of Vibration and Acoustics: Recent submissions
Now showing items 2021-2040 of 3913
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Dynamic Behavior of Piezoelectric Recurve Actuation Architectures
(The American Society of Mechanical Engineers (ASME), 2004)A new family of piezoelectric actuators, called Recurves, exhibits high work per volume and have the extra benefit of performance and packaging tailorability. The focus of this paper is the ... -
Nonlinear Dynamics of a Micro-Electro-Mechanical System With Time-Varying Capacitors
(The American Society of Mechanical Engineers (ASME), 2004)The natural frequency and responses of a micro-electro-mechanical system (MEMS) with time-varying capacitors are determined under an equivalent direct current (DC) voltage. Under alternating current ... -
Identification of Multi-Axle Vehicle Loads on Bridges
(The American Society of Mechanical Engineers (ASME), 2004)Both the time domain method (TDM) and frequency-time domain method (FTDM) are introduced and modified for the indirect identification of multi-axle vehicle loads from the bending moment responses ... -
A Dynamical Systems Approach to Failure Prognosis
(The American Society of Mechanical Engineers (ASME), 2004)In this paper, a previously published damage tracking method is extended to provide failure prognosis, and applied experimentally to an electromechanical system with a failing supply battery. The ... -
Identification of Multi-Degree of Freedom Systems With Nonproportional Damping Using the Resonant Decay Method
(The American Society of Mechanical Engineers (ASME), 2004)This paper describes an extension of the force appropriation approach which permits the identification of the modal mass, damping and stiffness matrices of nonproportionally damped systems using ... -
Semiactive Isolator With Liquid-Crystal Type ER Fluid for Momentum-Wheel Vibration Isolation
(The American Society of Mechanical Engineers (ASME), 2004)A semiactive isolator filled with liquid-crystal type electro-rheological (ER) fluid was developed to attenuate the disturbances generated by a momentum-wheel and to improve pointing performance. ... -
Micro-Control Actions and Location Sensitivity of Actuator Patches Laminated on Toroidal Shells
(The American Society of Mechanical Engineers (ASME), 2004)Toroidal shell structures have been proposed for components of inflatable telescopes and space structures, etc. over the years. Thus, distributed control of toroidal shells becomes a critical ... -
An Investigation of Excitation Method for Torsional Testing of a Large-Scale Steam Turbine Generator
(The American Society of Mechanical Engineers (ASME), 2004)Presently, the “negative sequence current method” is widely used in field-testing to determine torsional vibration characteristics of steam turbine generator rotor systems. The natural frequencies ... -
Quarter-Cycle Switching Control for Switch-Shunted Dampers
(The American Society of Mechanical Engineers (ASME), 2004)Significant interest has been generated by the possibilities of active vibration control through the implementation of state switching, with a specific implementation embodied through piezoceramic ... -
Mechanical Fault Detection Based on the Wavelet De-Noising Technique
(The American Society of Mechanical Engineers (ASME), 2004)For gears and roller bearings, periodic impulses indicate that there are faults in the components. However, it is difficult to detect the impulses at the early stage of fault because they are ... -
Pattern Recognition for Automatic Machinery Fault Diagnosis
(The American Society of Mechanical Engineers (ASME), 2004)We present a generic methodology for machinery fault diagnosis through pattern recognition techniques. The proposed method has the advantage of dealing with complicated signatures, such as those ... -
Isolated Resonance Captures and Resonance Capture Cascades Leading to Single- or Multi-Mode Passive Energy Pumping in Damped Coupled Oscillators
(The American Society of Mechanical Engineers (ASME), 2004)We examine passive energy pumping in a system of damped coupled oscillators. This is a one-way, passive and irreversible energy flow from a linear main system to a nonlinear attachment that ... -
Aerodynamically and Structurally Coupled Vibration of Multiple Co-Rotating Disks
(The American Society of Mechanical Engineers (ASME), 2004)This paper studies vibration of multiple, co-rotating, identical disks coupled by air flow and structural flexibility. In particular, the study focuses on coupled vibration of disk modes with ... -
Modelling, Identification, and Passivity-Based Robust Control of Piezo-actuated Flexible Beam
(The American Society of Mechanical Engineers (ASME), 2004)This paper presents modelling, system identification, simulation, and experimental results for passivity-based robust control of piezo-actuated flexible beam. The flexible beam configuration considered ... -
Simulation and Characterization of Particle Damping in Transient Vibrations
(The American Society of Mechanical Engineers (ASME), 2004)Particle damping is a technique of providing damping with granular particles embedded within small holes in a vibrating structure. The particles absorb kinetic energy through particle-to-wall and ... -
Using the Modal and Trigonometric Collocation Methods in Rotor Dynamic Systems
(The American Society of Mechanical Engineers (ASME), 2004)This article deals with the computational modeling of nonlinear rotor dynamic systems. The theoretical basis of the modal method, and combination with the method of dynamic compliances supplemented ... -
Design of Nonproportional Damped Systems via Symmetric Positive Inverse Problems
(The American Society of Mechanical Engineers (ASME), 2004)This paper summarizes the authors’ previous efforts on solving inverse eigenvalue problems for linear vibrating systems described by a vector differential equations with constant coefficient matrices ... -
Structural Dynamics Optimization Based on a Hybrid Inverse Synthesis Method Using a Quadratic Approximation
(The American Society of Mechanical Engineers (ASME), 2004)This paper lies within the framework of the so-called redesign problem of structures subjected to dynamic constraints. A hybrid synthesis algorithm is developed, combining the truncated modal ... -
Nonlinear Periodically Forced Vibration of Stay Cables
(The American Society of Mechanical Engineers (ASME), 2004)A new method for analyzing nonlinear steady-state dynamic response of three-dimensional sagged stay cables subject to arbitrary periodic excitation is proposed in this paper. Firstly, the nonlinear ... -
Laser Vibrometry Based Detection of Delaminations in Glass/Epoxy Composites
(The American Society of Mechanical Engineers (ASME), 2004)The significant progress in sensing and data processing technology has made monitoring and damage detection of engineering structures increasingly attractive. This paper presents a reliable in-situ ...