Journal of Vibration and Acoustics: Recent submissions
Now showing items 881-900 of 3913
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Experimental Implementation of Opposed Shape Memory Alloy Wires for Actuator Control
(The American Society of Mechanical Engineers (ASME), 2015)Shape memory alloys (SMAs) are capable linear actuators. This research demonstrates the capabilities of SMA wires for the control of a pivot actuator. The wires impart opposing forces to control the motion of the pivot, ... -
Harmonic Balance Analysis of Snap Through Orbits in an Undamped Duffing Oscillator
(The American Society of Mechanical Engineers (ASME), 2015)A simple nonlinear undamped Duffing oscillator has been studied for its snapthrough behavior at largeamplitude vibrations. We present an algorithm that uses the harmonic balance (HB) method to find amplitude and frequency ... -
Transform Operator Pair Assisted Hilbert–Huang Transform for Signals With Instantaneous Frequency Intersections
(The American Society of Mechanical Engineers (ASME), 2015)Due to low frequency resolution for closely spaced spectral components, i.e., the instantaneous frequencies (IFs) lie within an octave or even have intersections, the Hilbert–Huang transform (HHT) fails to separate such ... -
Effect of the Inhomogeneity in Races on the Dynamic Behavior of Rolling Bearing
(The American Society of Mechanical Engineers (ASME), 2015)This paper develops an analytical model to investigate the effect of inhomogeneity in races on the dynamic behaviors of rolling bearing. The governing differential equations are obtained based on the Hertz contact theory ... -
Optimal Damped Vibration Absorber: Including Multiple Modes and Excitation Due to Rotating Unbalance
(The American Society of Mechanical Engineers (ASME), 2015)Optimal vibration absorbers are designed using the definition of Hinfinity norm and numerical optimization. The cases of both constant amplitude excitation and rotating unbalance excitation are considered. The design ... -
Broadband Energy Harvesting From Vibrations Using Magnetic Transduction
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, an adaptive electromagnetic energy harvester is proposed and analyzed. It is composed of an oscillating mass equipped with an electromagnetic transducer, whose pins are connected to a resonant resistive– ... -
Shock Based Experimental Investigation of the Linear Particle Chain Impact Damper
(The American Society of Mechanical Engineers (ASME), 2015)Impact dampers (IDs) provide an effective, economical, and retrofittable solution to the vibration problem in several engineering applications. An ID typically consists of a single or multiple masses constrained between ... -
Experimental Analysis of the Unbalance Response of Rigid Rotors Supported on Aerodynamic Foil Bearings
(The American Society of Mechanical Engineers (ASME), 2015)The paper presents the experimental unbalance response of two slightly different rigid rotors supported by aerodynamic foil bearings. Impulse (Pelton) turbines manufactured directly in the mass of the rotors (on the outer ... -
An Efficient Quasi Three Dimensional Model of Tilting Pad Journal Bearing for Turbomachinery Applications
(The American Society of Mechanical Engineers (ASME), 2015)The constant increase of turbomachinery rotational speed has brought the design and the use of journal bearings to their very limits: tilting pad journal bearings (TPJBs) have been introduced for highspeed/highload ... -
Self Excited Vibrational Cantilever Type Viscometer Driven by Piezo Actuator
(The American Society of Mechanical Engineers (ASME), 2015)The design and operation of new viscometers are often presented with a focus on the miniaturization of the device and online monitoring of small amounts of liquid samples. The vibrational viscometers commonly used for ... -
Compressor Blade Vibration Measurements Using Blade Image Velocimetry
(The American Society of Mechanical Engineers (ASME), 2015)This paper discusses the application of a novel vibration measurement technique, termed blade image velocimetry (BIV), to a highspeed axial compressor. Measurements of compressor blade vibration can be difficult to obtain ... -
Closed Form Vibration Response of a Special Class of Spinning, Cyclic Symmetric Rotor Bearing Housing Systems
(The American Society of Mechanical Engineers (ASME), 2015)Vibration of a spinning, cyclic symmetric rotor supported by flexible bearings and housing is governed by a set of ordinary differential equations with periodic coefficients. As a result, analytical solutions of such systems ... -
Reducing Dynamic Response Variation Using NURBS Finite Element Based Geometry Perturbation
(The American Society of Mechanical Engineers (ASME), 2015)The uncertainties in real structures usually lead to variations in their dynamic responses. In order to reduce the likelihood of unexpected failures in structures, it is necessary to reduce the response variations. Among ... -
Dynamical Modeling of the “Power Ball†Considering the Transition Between the Rolling Mode and the Sliding Mode
(The American Society of Mechanical Engineers (ASME), 2015)The gyroscopic exercise tool which utilizes a gyroscopic effect caused by the whirling motion of a highspeed rotating body to train the antebrachial muscle is considered. When an input motion of 3–5 Hz is added to the ... -
Modal Analysis of the Setar: A Numerical–Experimental Comparison
(The American Society of Mechanical Engineers (ASME), 2015)The setar, a Persian longnecked lute, is analyzed by means of experimental modal analysis and finite element (FE) method. The experimental analysis is performed using a combination of impulse hammer and laser Doppler ... -
A Horizontal Diamagnetic Levitation Based Low Frequency Vibration Energy Harvester
(The American Society of Mechanical Engineers (ASME), 2015)This paper investigates a horizontal diamagnetic levitation (HDL) system for vibration energy harvesting in contrast to the vertical diamagnetic levitation (VDL) system recently proposed by Wang et al. (2013, “A Magnetically ... -
Optimal Designs for Vibrating Structures Using a Moving Isosurface Threshold Method With Experimental Study
(The American Society of Mechanical Engineers (ASME), 2015)This paper studies optimal designs for vibrating structures using a moving isosurface threshold method (MIST). In the present study, a combination of strain and kinetic energy densities is selected as a response function ... -
Seven Parameter Linear Viscoelastic Model Applied to Acoustical Damping Materials
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, linear viscoelastic rheological properties of acoustical damping materials are predicted. A rheological model, based on a mechanical element approach, is presented. It consists of a combination of two springs, ... -
Partial Stochastic Linearization of a Spherical Pendulum With Coriolis Damping Produced by Radial Spring and Damper
(The American Society of Mechanical Engineers (ASME), 2015)This study considers the stochastic analysis of a spherical pendulum, whose bidirectional vibration is reduced by spring and damper installed in the radial direction between the point mass and the cable. Under sway motion, ... -
Dynamic Instability of Laminated Composite and Sandwich Plates Using a New Inverse Trigonometric Zigzag Theory
(The American Society of Mechanical Engineers (ASME), 2015)A structure with periodic dynamic load may lead to dynamic instability due to parametric resonance. In the present work, the dynamic stability analysis of laminated composite and sandwich plate due to inplane periodic loads ...