Journal of Vibration and Acoustics: Recent submissions
Now showing items 1201-1220 of 3913
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Analytical Solutions for Stable and Unstable Period 1 Motions in a Periodically Forced Oscillator With Quadratic Nonlinearity
(The American Society of Mechanical Engineers (ASME), 2013)In this note, a closedform solution of periodic motions in a periodically forced oscillator with quadratic nonlinearity is presented without any small parameters. The perturbation method is based on one harmonic term plus ... -
Research on Wave Mode Conversion of Curved Beam Structures by the Wave Approach
(The American Society of Mechanical Engineers (ASME), 2013)A general wave approach for the vibration analysis of curved beam structures is presented. The analysis is based on wave propagation, transmission, and reflection, including the effects of both propagating and decaying ... -
Experimental Verification of a Combi Bearing Model for Vertical Rotor Systems
(The American Society of Mechanical Engineers (ASME), 2013)Combibearing is a combined thrustjournal bearing design used in vertical hydropower rotors. The dynamic characteristics of this component (combibearing) were analytically modeled by Luneno et al. (2011, “Model Based ... -
Investigation on the Stability and Bifurcation of a 3D Rotor Bearing System
(The American Society of Mechanical Engineers (ASME), 2013)The stability and bifurcation of a flexible 3D rotor system are investigated in this paper. The rotor is discretized by 3D elements and reduced by using component mode synthesis. Periodic motions and stability margins are ... -
Tuning of Acoustic Bandgaps in Phononic Crystals With Helmholtz Resonators
(The American Society of Mechanical Engineers (ASME), 2013)In this paper, acoustic wave propagation in a twoor threedimensional phononic crystal consisting of Helmholtz resonators embedded in a fluid matrix is studied. The band structures are calculated to discuss the influence ... -
Adaptive Concepts for Herschel–Quincke Waveguides
(The American Society of Mechanical Engineers (ASME), 2013)The enhancement of Herschel–Quincke (HQ) waveguides to incorporate adaptive capabilities is investigated. Passive HQ waveguides are known to provide noise attenuation in pipes and ducts at selective narrow frequency bands ... -
Vibration Analysis of Doubly Curved Shallow Shells With Elastic Edge Restraints
(The American Society of Mechanical Engineers (ASME), 2013)An analytical method is derived for the vibration analysis of doubly curved shallow shells with arbitrary elastic supports alone its edges, a class of problems which are rarely attempted in the literature. Under this ... -
Ensemble Empirical Mode Decomposition Based Teager Energy Spectrum for Bearing Fault Diagnosis
(The American Society of Mechanical Engineers (ASME), 2013)Periodic impulses in vibration signals and its repeating frequency are the key indicators for diagnosing the local damage of rolling element bearings. A new method based on ensemble empirical mode decomposition (EEMD) and ... -
Noncontact Manipulation of Light Objects Based on Parameter Modulations of Acoustic Pressure Nodes
(The American Society of Mechanical Engineers (ASME), 2013)An investigation of noncontact manipulation techniques based on acoustic levitation was undertaken in air. The standing wave acoustic levitation (SWAL) was observed when standing waves trap small objects at pressure nodes. ... -
Simulations and Measurements of the Vibroacoustic Effects of Replacing Rolling Element Bearings With Journal Bearings in a Simple Gearbox
(The American Society of Mechanical Engineers (ASME), 2013)The effects of replacing rolling element bearings with journal bearings on the noise and vibration of a simple gearbox are computationally and experimentally evaluated. A modified component mode synthesis (CMS) approach ... -
Complex Modal Decomposition for Estimating Wave Properties in One Dimensional Media
(The American Society of Mechanical Engineers (ASME), 2013)A method of complex orthogonal decomposition is summarized for the timedomain, and then formulated and justified for application in the frequencydomain. The method is then applied to the extraction of modes from simulation ... -
Free Vibration of a High Speed Rotating Truncated Spherical Shell
(The American Society of Mechanical Engineers (ASME), 2013)This paper is the first work on the vibration of a highspeed rotating spherical shell that rotates about its symmetric axis by developing a set of motion governing equations with consideration of both the Coriolis and ... -
Electromagnetically Induced Vibration in Particulate Functionalized Materials
(The American Society of Mechanical Engineers (ASME), 2013)In many smallscale devices, the materials employed are functionalized (doped) with microscale and/or nanoscale particles, in order to deliver desired overall dielectric properties. In this work, we develop a reducedorder ... -
Vibrations of Pipes and Their Supporting Beams Caused by Tank Bulging Mode
(The American Society of Mechanical Engineers (ASME), 2013)The vibrations of pipes and their supporting beams caused by the tank bulging mode are analyzed. A computationally efficient semianalytical approach is presented by introducing a local velocity potential for each pipe and ... -
Acoustic Radiation From Thick Laminated Cylindrical Shells With Sparse Cross Stiffeners
(The American Society of Mechanical Engineers (ASME), 2013)A general method for predicting acoustic radiation from multiple periodic structures is presented and a numerical solution is proposed to find the radial displacement of thick laminated cylindrical shells with sparse cross ... -
Dynamic Features of a Planetary Gear System With Tooth Crack Under Different Sizes and Inclination Angles
(The American Society of Mechanical Engineers (ASME), 2013)Planetary gears are widely used in the industry due to their advantages of compactness, high powertoweight ratios, high efficiency, and so on. However, planetary gears such as that in wind turbine transmissions always ... -
Active Acoustic Metamaterial With Simultaneously Programmable Density and Bulk Modulus
(The American Society of Mechanical Engineers (ASME), 2013)Acoustic metamaterials are those structurally engineered materials that are composed of periodic cells designed in such a fashion to yield specific material properties (density and bulk modulus) that would affect the wave ... -
Modeling and Validation of Rotational Vibration Responses for Accessory Drive Systems—Part I: Experiments and Belt Modeling
(The American Society of Mechanical Engineers (ASME), 2013)Experimental and modeling techniques for belt longitudinal static stiffness, longitudinal dynamic stiffness and damping coefficient, bending stiffness, and friction coefficient between a pulley and a belt are presented. ... -
Modeling and Validation of Rotational Vibration Responses for Accessory Drive System—Part II: Simulations and Analyses
(The American Society of Mechanical Engineers (ASME), 2013)This is the second part of the paper for modeling and validation of the rotational vibration responses for an accessory drive system. The unified formulas for modeling the rotational vibration of an accessory drive system ... -
Flow Induced Instability on High Speed Mini Rotors in Laminar Flow
(The American Society of Mechanical Engineers (ASME), 2013)In this study, a modeling approach is developed to examine laminar flow effects on the rotordynamic behavior of highspeed mini rotating machinery with a moderate flow confinement. The existing research work mostly focuses ...