Journal of Vibration and Acoustics: Recent submissions
Now showing items 821-840 of 3913
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A Hybrid Coordinates Component Mode Synthesis Method for Dynamic Analysis of Structures With Localized Nonlinearities
(The American Society of Mechanical Engineers (ASME), 2016)This paper reports on the development of the component mode synthesis (CMS) method using hybrid coordinates for a localized nonlinear dynamic system. As is well known, the CMS method is effective in reducing the degreesoffreedom ... -
Propagation of In Plane Shear Waves in Magnetically Affected Highly Conductive Nanofilms by Considering Both Surface and Nonlocality Effects
(The American Society of Mechanical Engineers (ASME), 2016)To study the size and surface effects on characteristics of inplane shear waves in magnetically affected nanofilms, a novel model is developed. Using nonlocal and surface continuum theories, the governing equations are ... -
A Flexoelectric Double Curvature Nonlinear Shell Energy Harvester
(The American Society of Mechanical Engineers (ASME), 2016)Flexoelectricity possesses two gradientdependent electromechanical coupling effects: the direct flexoelectric effect and the converse flexoelectric effect. The former can be used for sensing and energy generation; the ... -
Frequency Analysis of Linearly Coupled Modes of MEMS Arrays
(The American Society of Mechanical Engineers (ASME), 2016)Microelectromechanical system (MEMS) based arrays have been employed to increase the bandwidth and sensitivity of many sensors and actuators. In this paper, we present an approximate model to demonstrate the tuning of ... -
Limit Cycle Analysis of Three Dimensional Flexible Shaft/Rigid Rotor/Autobalancer System With Symmetric Rigid Supports
(The American Society of Mechanical Engineers (ASME), 2016)In recent years, there has been much interest in the use of automatic balancing devices (ABD) in rotating machinery. Autobalancers consist of several freely moving eccentric balancing masses mounted on the rotor, which, ... -
Ray Tracing Using Radial Basis Function Networks
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents a numerical method of tracing of sound or other refracted rays through a medium with arbitrarily varying refractive index. The method uses a radial basis function (RBF) network to define the refractive ... -
Rotordynamic Analysis of Rotor–Stator Rub Using Rough Surface Contact
(The American Society of Mechanical Engineers (ASME), 2016)Undesirable rotor–stator rub is frequently observed in rotordynamic systems, and has been the subject of many investigations. Most of these studies employ a simple piecewisesmooth linearelastic contact model (LECM), where ... -
Performance and Robustness Improvements in Ultrasonic Transportation Against Large Scale Streaming
(The American Society of Mechanical Engineers (ASME), 2016)Acoustic streaming generated from the travelingwave component of a synthesized sound field often has considerable influence on ultrasonic manipulations, in which the behavior of microparticles may be disturbed. In this ... -
Elastic Metamaterials With Low Frequency Passbands Based on Lattice System With On Site Potential
(The American Society of Mechanical Engineers (ASME), 2016)An elastic metamaterial with a lowfrequency passband is proposed by imitating a lattice system with linear onsite potential. It is shown that waves can only propagate in the tunable passband. Then, two kinds of elastic ... -
Functional Generalized Inverse Beamforming Based on the Double Layer Microphone Array Applied to Separate the Sound Sources
(The American Society of Mechanical Engineers (ASME), 2016)Beamforming based on microphone array measurements is a popular method for identifying sound sources. However, beamforming has many limitations that limit their precision. These limitations are addressed in research. To ... -
A New Methodology for Modeling and Free Vibrations Analysis of Rotating Shaft Based on the Timoshenko Beam Theory
(The American Society of Mechanical Engineers (ASME), 2016)The linear lateral free vibration analysis of the rotor is performed based on a new insight on the Timoshenko beam theory. Rotary inertia, gyroscopic effects, and shear deformations are included, but the torsion is neglected ... -
Limit Cycle Analysis of Planar Rotor/Autobalancer System Influenced by Alford's Force
(The American Society of Mechanical Engineers (ASME), 2016)In recent years, there has been much interest in the use of socalled automatic balancing devices (ABDs) in rotating machinery. Essentially, ABDs or “autobalancers†consist of several freely moving eccentric balancing ... -
Simulation Analysis of Casing Vibration Response and Its Verification Under Blade–Casing Rubbing Fault
(The American Society of Mechanical Engineers (ASME), 2016)A new rotor–stator rubbing model considering the blade–casing rubbing fault is put forward in this paper. The model couples the rotor together with its suspension (ball or roller bearings), the disk, the (multiple) ... -
Numerical Tracking of Limit Points for Direct Parametric Analysis in Nonlinear Rotordynamics
(The American Society of Mechanical Engineers (ASME), 2016)A frequencydomain approach for direct parametric analysis of limit points (LPs) of nonlinear dynamical systems is presented in this paper. Instead of computing responses curves for several values of a given system parameter, ... -
Efficient Energy Harvesting Using Piezoelectric Compliant Mechanisms: Theory and Experiment
(The American Society of Mechanical Engineers (ASME), 2016)Piezoelectric energy harvesters typically perform poorly in the low frequency, low amplitude, and intermittent excitation environment of human movement. In this paper, a piezoelectric compliant mechanism (PCM) energy ... -
A Dynamic Model for Double Planet Planetary Gearsets
(The American Society of Mechanical Engineers (ASME), 2016)In this study, a twodimensional (2D), steadystate, discrete dynamic model of a doubleplanet planetary gearset is proposed. The dynamic model is generalized such that it can consist of N number of planet branches and can ... -
Semi Exact Natural Frequencies for Kirchhoff–Love Plates Using Wave Based Phase Closure
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents semiexact, closedform algebraic expressions for the natural frequencies of Kirchhoff–Love plates by analyzing plane waves, their edge reflections, and their phase closure. The semiexact nature is such ... -
Vibrations of Elliptically Shaped Bearings in Strain Wave Gearings
(The American Society of Mechanical Engineers (ASME), 2016)The bearing of a strain wave gearing and the covering thinwalled cup, i.e., the socalled flexspline, are elliptically deformed. This leads to a characteristic excitation of vibration. In this paper, a model for describing ... -
Active Control of a Very Large Floating Beam Structure
(The American Society of Mechanical Engineers (ASME), 2016)In this paper, a novel boundary control method is investigated to suppress the vertical vibration of a very large floating structure (VLFS) with regular waves. The VLFS can be described as a distributed parameter system ... -
Quantification of Vibration Localization in Periodic Structures
(The American Society of Mechanical Engineers (ASME), 2016)The phenomenon of vibration mode localization in periodic and near periodic structures has been well documented over the past four decades. In spite of its long history, and presence in a wide range of engineering structures, ...