Journal of Vibration and Acoustics: Recent submissions
Now showing items 1361-1380 of 3913
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Resonances of a Forced Mathieu Equation With Reference to Wind Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2012)A horizontal axis wind turbine blade in steady rotation endures cyclic transverse loading due to wind shear, tower shadowing and gravity, and a cyclic gravitational axial loading at the same ... -
A Journal Bearing With Variable Geometry for the Reduction of the Maximum Amplitude During Passage Through Resonance
(The American Society of Mechanical Engineers (ASME), 2012)A concept for a journal bearing with variable stiffness and damping properties is developed in order to decrease the vibration amplitude of a rotor-journal bearing system during passage through ... -
Vibration Characteristics of Guided Circular Saws: Experimental and Numerical Analyses
(The American Society of Mechanical Engineers (ASME), 2012)Studying the vibrational characteristics of guided circular saws is of particular interest in the current study. Guided circular saws are free in both the inner and outer rim. They are restrained ... -
Flexural Vibration Band Gap in a Periodic Fluid-Conveying Pipe System Based on the Timoshenko Beam Theory
(The American Society of Mechanical Engineers (ASME), 2011)The flexural vibration band gap in a periodic fluid-conveying pipe system is studied based on the Timoshenko beam theory. The band structure of the flexural wave is calculated with a transfer ... -
Modeling and Testing of a Novel Aeroelastic Flutter Energy Harvester
(The American Society of Mechanical Engineers (ASME), 2011)This paper proposes a novel piezoelectric energy harvesting device driven by aeroelastic flutter vibrations of a simple pin connected flap and beam. The system is subject to a modal convergence ... -
Energy Harvesting From Impulsive Loads Using Intentional Essential Nonlinearities
(The American Society of Mechanical Engineers (ASME), 2011)Energy harvesting devices designed with intentional nonlinearities offer the possibility of increased performance under broadband excitations and realistic environmental conditions. This work considers ... -
A Comprehensive Study of the RL Series Resonant Shunted Piezoelectric: A Feedback Controls Perspective
(The American Society of Mechanical Engineers (ASME), 2011)The resonant shunted piezoelectric has been shown a viable solution for stable vibration control. Two main implementations of the single mode shunt circuit have been developed; the original with ... -
Electromechanical Modeling and Nonlinear Analysis of Axially Loaded Energy Harvesters
(The American Society of Mechanical Engineers (ASME), 2011)To maximize the electromechanical transduction of vibratory energy harvesters, the resonance frequency of the harvesting device is usually tuned to the excitation frequency. To achieve this goal, ... -
Modeling and Analysis of Piezoelectric Energy Harvesting Beams Using the Dynamic Stiffness and Analytical Modal Analysis Methods
(The American Society of Mechanical Engineers (ASME), 2011)The modeling and analysis of base-excited piezoelectric energy harvesting beams have attracted many researchers with the aim of predicting the electrical output for a given base motion input. ... -
Optimal Energy Harvesting From Low-Frequency Bistate Force Loadings
(The American Society of Mechanical Engineers (ASME), 2011)This paper considers techniques for harvesting energy from vibratory loadings that can be characterized by low-frequency alternations between a minimum and maximum force magnitude. In such cases, ... -
Modeling and Analysis of Piezoelectric Energy Harvesting From Aeroelastic Vibrations Using the Doublet-Lattice Method
(The American Society of Mechanical Engineers (ASME), 2011)Multifunctional structures are pointed out as an important technology for the design of aircraft with volume, mass, and energy source limitations such as unmanned air vehicles (UAVs) and micro ... -
Vibration Analysis of Submerged Submarine Pressure Hull
(The American Society of Mechanical Engineers (ASME), 2011)Ring stiffened cylindrical shells are used in many structural applications, such as pressure vessels, submarine hulls, aircrafts, launch vehicles, and waterborne ballistic missiles. Most of these ... -
Fabrication and Energy Harvesting Measurements of Vibrating MEMS Piezoelectric Benders
(The American Society of Mechanical Engineers (ASME), 2011)In this paper, a study is presented in which piezoelectric microbenders were fabricated and tested to demonstrate energy generating performance. Trapezoidal and diagonal (with respect to the ... -
Modeling and Analysis of a Piezoelectric Energy Scavenger for Rotary Motion Applications
(The American Society of Mechanical Engineers (ASME), 2011)This paper presents modeling and analysis of a piezoelectric mounted rotary flexible beam that can be used as an energy scavenger for rotary motion applications. The energy harvester system ... -
Finite Element Modeling of Structures With L-Shaped Beams and Bolted Joints
(The American Society of Mechanical Engineers (ASME), 2011)Due to bending-torsion coupled vibrations of the L-shaped beams and numerous uncertainties associated with the bolted joints, modeling structures with L-shaped beams and bolted joints is a ... -
Dynamic Analysis of a Motion Transformer Mimicking a Hula Hoop
(The American Society of Mechanical Engineers (ASME), 2011)Hula-hoop motion refers to the spinning of a ring around a human body; it is made possible by the interactive force between the moving ring and the body. Inspired by the generic concept of ... -
Eigenfrequency Computation of Beam/Plate Carrying Concentrated Mass/Spring
(The American Society of Mechanical Engineers (ASME), 2011)With the adsorption of analyte on the resonator mass sensor, the system eigenfrequencies will shift due to the changes of inertial mass and structural rigidity. How to model those changes and ... -
Nonlinear Amplitude-Frequency Response of a Helmholtz Resonator
(The American Society of Mechanical Engineers (ASME), 2011)Nonlinear amplitude-frequency response of an acoustic Helmholtz resonator is investigated by incorporating linear damping, nonlinear damping, and nonlinear restoration. Method of multiple time scale ... -
A Study on the Relationship of Embedded Sensitivity With Measuring Grid and Mode Shapes
(The American Society of Mechanical Engineers (ASME), 2011)Embedded sensitivity analysis has proven to be a useful tool in finding optimum positions of structure reinforcements. However, it was not clear how sensitivities obtained from the embedded ... -
Comparing Linear and Essentially Nonlinear Vibration-Based Energy Harvesting
(The American Society of Mechanical Engineers (ASME), 2011)This work considers the performance of a resonant vibration-based energy harvesting system utilizing a strongly nonlinear attachment. Typical designs serving as the basis for harvesting energy ...