Journal of Vibration and Acoustics: Recent submissions
Now showing items 761-780 of 3913
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Vibration Suppression of an Underactuated Dynamic System Using Virtual Actuators
(The American Society of Mechanical Engineers (ASME), 2016)Sloshing is one of the critical problems in aerospace vehicles with liquid containers. Motion of the liquid in resonance situations can degrade the stability and performance of attitude control systems. Two important ... -
Wave Energy Focalization in a Plate With Imperfect Two Dimensional Acoustic Black Hole Indentation
(The American Society of Mechanical Engineers (ASME), 2016)The acoustic black hole (ABH) phenomenon in thinwalled structures with a tailored powerlawprofiled thickness allows for a gradual change of the phase velocity of flexural waves and energy focalization. However, ideal ABH ... -
Mass Sensitivity of Nonuniform Microcantilever Beams
(The American Society of Mechanical Engineers (ASME), 2016)Microelectromechanical systems (MEMS) based cantilever beams have been widely used in various sensing applications. Previous studies have aimed at increasing the sensitivity of biosensors by reducing the size of cantilever ... -
Characterization of the Dominant Structural Vibration of Hearing Aid Receivers
(The American Society of Mechanical Engineers (ASME), 2016)Results are presented of an analysis and characterization of the mechanical vibration of hearing aid receivers, a key electroacoustic component of hearing aids. The function of a receiver in a hearing aid is to provide an ... -
Vibration Suppression Effect in a Bending Levitated Flexible Steel Plate by the Electromagnetic Force
(The American Society of Mechanical Engineers (ASME), 2016)We have proposed a method of levitating a thin steel plate by moderately bending it beforehand. To elucidate the bending levitation performance, an ultrathin steel plate was levitated; the relationship among the tilt angle ... -
Highly Efficient Probabilistic Finite Element Model Updating Using Intelligent Inference With Incomplete Modal Information
(The American Society of Mechanical Engineers (ASME), 2016)A highly efficient probabilistic framework of finite element model updating in the presence of measurement noise/uncertainty using intelligent inference is presented. This framework uses incomplete modal measurement ... -
Layerwise Analyses of Compact and Thin Walled Beams Made of Viscoelastic Materials
(The American Society of Mechanical Engineers (ASME), 2016)This paper evaluates the vibration characteristics of structures with viscoelastic materials. The mechanical properties of viscoelastic layers have been described with the complex modulus approach. The equations of motion ... -
Frictional Damping of Flutter: Microslip Versus Macroslip
(The American Society of Mechanical Engineers (ASME), 2016)Friction dampers are utilized in turbomachinery to reduce blade vibrations resulting from aeroelastic interactions. In this paper, the microslip friction model is applied to a blade with blade to ground damper and subjected ... -
Suppression of Lateral and Torsional Stick–Slip Vibrations of Drillstrings With Impact and Torsional Dampers
(The American Society of Mechanical Engineers (ASME), 2016)Violent drillstring vibrations in a well should be suppressed to prevent premature failure of the drillstring parts and borehole wall and enhance the drilling process. This paper presents novel centralized impact dampers ... -
Parametric Identification of Nonlinear Vibration Systems Via Polynomial Chirplet Transform
(The American Society of Mechanical Engineers (ASME), 2016)The response of a nonlinear oscillator is characterized by its instantaneous amplitude (IA) and instantaneous frequency (IF) features, which can be significantly affected by the physical properties of the system. Accordingly, ... -
Size Estimation for Naturally Occurring Bearing Faults Using Synchronous Averaging of Vibration Signals
(The American Society of Mechanical Engineers (ASME), 2016)One of the most critical categories of machine failure is rolling element bearing failure. Most bearing failures start from raceway fatigue spalls. From the initial formation of spalls, a bearing may still have 10–20% ... -
An Experimental Investigation of Acoustic Black Hole Dynamics at Low, Mid, and High Frequencies
(The American Society of Mechanical Engineers (ASME), 2016)The acoustic black hole (ABH) has been developed in recent years as an effective, passive, and lightweight method for attenuating bending wave vibrations in beams and plates and reducing the sound radiation and structuralacoustic ... -
Experimental and Numerical Validation of Digital, Electromechanical, Parametrically Excited Amplifiers
(The American Society of Mechanical Engineers (ASME), 2016)A parametric amplifier having a tunable, dualfrequency pumping signal and a controlled cubic stiffness term is realized and investigated experimentally. This device can be tuned to amplify a desired, single frequency weak ... -
Nonstationary Vibration Signal Analysis Using Wavelet Based Time–Frequency Filter and Wigner–Ville Distribution
(The American Society of Mechanical Engineers (ASME), 2016)Vibration responses of nonlinear or timevarying dynamical systems are always nonstationary. Time–frequency representation becomes a necessary approach to analysis such signals. In this paper, a nonstationary vibration ... -
Experimental and Numerical Study of the Vibration of Stationary and Rotating Annular Disks
(The American Society of Mechanical Engineers (ASME), 2016)Numerical and experimental investigations are carried out to study the combined effect of rotation and support nonuniformity on the modal characteristics of circular thick disks. The laboratory experiments on stationary ... -
Dynamical Models of a Wire Scanner
(The American Society of Mechanical Engineers (ASME), 2016)The accuracy of the beam profile measurements achievable by the current wire scanners at CERN is limited by the vibrations of their mechanical parts. In particular, the vibrations of the carbon wire represent the major ... -
Damage Identification of Beams Using a Continuously Scanning Laser Doppler Vibrometer System
(The American Society of Mechanical Engineers (ASME), 2016)A continuously scanning laser Doppler vibrometer (CSLDV) system is capable of rapidly obtaining spatially dense operating deflection shapes (ODSs) by continuously sweeping a laser spot from the system over a structure ... -
A Higher Order Shear Deformation Model of a Periodically Sectioned Plate
(The American Society of Mechanical Engineers (ASME), 2016)This paper develops a higherorder shear deformation model of a periodically sectioned plate. A parabolic deformation expression is used with periodic analysis methods to calculate the displacement field as a function of ... -
Effects of Bearings and Housing on Mode Localization of a Nearly Cyclic Symmetric System
(The American Society of Mechanical Engineers (ASME), 2016)This technical brief is to study how flexible bearings and housing affect mode localization of a nearly cyclic symmetric system with mistuning. This study is conducted via finiteelement analyses and deductive reasoning. A ... -
An Experimental Study of Robustness of Multi Objective Optimal Sliding Mode Control
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents an experimental study of robustness of multiobjective optimal sliding mode control, which is designed in a previous study. Inertial and stiffness uncertainties are introduced to a two degreesoffreedom ...