Journal of Vibration and Acoustics: Recent submissions
Now showing items 1001-1020 of 3913
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On the Performance of a Two Stage Vibration Isolation System Which has Geometrically Nonlinear Stiffness
(The American Society of Mechanical Engineers (ASME), 2014)Linear singlestage vibration isolation systems have a limitation on their performance, which can be overcome passively by using linear twostage isolations systems. It has been demonstrated by several researchers that linear ... -
Numerical Local Time Stepping Solutions for Transient Statistical Energy Analysis
(The American Society of Mechanical Engineers (ASME), 2014)Subsystem energies evolve in transient statistical energy analysis (TSEA) according to a linear system of ordinary differential equations (ODEs), which is usually numerically solved by means of the forward Euler finite ... -
On the Apparent Propagation Speed in Transmission Line Matrix Uniform Grid Meshes
(The American Society of Mechanical Engineers (ASME), 2014)Numerical models consisting of twodimensional (2D) and threedimensional (3D) uniform grid meshes for the transmission line matrix method (TLM) currently use 2 and 3, respectively, to compensate for the apparent sound speed. ... -
Vibration Characteristics of Metamaterial Beams With Periodic Local Resonances
(The American Society of Mechanical Engineers (ASME), 2014)Vibration characteristics of metamaterial beams manufactured of assemblies of periodic cells with builtin local resonances are presented. Each cell consists of a base structure provided with cavities filled by a viscoelastic ... -
Performance Degradation Assessment for Bearing Based on Ensemble Empirical Mode Decomposition and Gaussian Mixture Model
(The American Society of Mechanical Engineers (ASME), 2014)This paper proposes a novel performance degradation assessment method for bearing based on ensemble empirical mode decomposition (EEMD), and Gaussian mixture model (GMM). EEMD is applied to preprocess the nonstationary ... -
Band Gap Control in an Active Elastic Metamaterial With Negative Capacitance Piezoelectric Shunting
(The American Society of Mechanical Engineers (ASME), 2014)Elastic metamaterials have been extensively investigated due to their significant effects on controlling propagation of elastic waves. One of the most interesting properties is the generation of band gaps, in which ... -
Sound Absorption Optimization of Graded Semi Open Cellular Metals by Adopting the Genetic Algorithm Method
(The American Society of Mechanical Engineers (ASME), 2014)Built upon the acoustic impedance of circular apertures and cylindrical cavities as well as the principle of electroacoustic analogy, an impedance model is developed to investigate theoretically the sound absorption ... -
On the Use of Spectral Averaging of Acoustic Emission Signals for Bearing Fault Diagnostics
(The American Society of Mechanical Engineers (ASME), 2014)For years, vibration analysis has been the industry standard for bearing fault diagnosis. However, due to the various advantages over vibration based techniques, the quantification of acoustic emission (AE) for bearing ... -
Tilting Pad Journal Bearings With Active Lubrication Applied as Calibrated Shakers: Theory and Experiment
(The American Society of Mechanical Engineers (ASME), 2014)In recent years, a continuous research effort has transformed the conventional tiltingpad journal bearing (TPJB) into a mechatronic machine element. The addition of electromechanical elements provides the possibility of ... -
Torsional Dynamic Response of a Shaft With Longitudinal and Circumferential Cracks
(The American Society of Mechanical Engineers (ASME), 2014)Turbo generator shafts are often subjected to cyclic torsion resulting in formation of large longitudinal cracks as well as circumferential cracks. The presence of these cracks could greatly impact the shaft resonance ... -
Free Vibration Response of Thin and Thick Nonhomogeneous Shells by Refined One Dimensional Analysis
(The American Society of Mechanical Engineers (ASME), 2014)The free vibration analysis of thinand thickwalled layered structures via a refined onedimensional (1D) approach is addressed in this paper. Carrera unified formulation (CUF) is employed to introduce higherorder 1D models ... -
Design for 1:2 Internal Resonances in In Plane Vibrations of Plates With Hyperelastic Materials
(The American Society of Mechanical Engineers (ASME), 2014)With advances in technology, hyperelastic materials are seeing use in varied applications ranging from microfluidic pumps, artificial muscles to deformable robots. Development of such complex devices is leading to increased ... -
Dynamic Analysis of a High Speed Rotor Ball Bearing System Under Elastohydrodynamic Lubrication
(The American Society of Mechanical Engineers (ASME), 2014)The nonlinear dynamic behaviors of a highspeed rotorball bearing system under elastohydrodynamic lubrication (EHL) are investigated. First, the numerical curve fittings for stiffness and damping coefficients of lubricated ... -
Order Tracking Analysis Using Generalized Fourier Transform With Nonorthogonal Basis
(The American Society of Mechanical Engineers (ASME), 2014)The nonorthogonal basis generalized Fourier transform is used as orders extraction technique during machinery speedup and slowdown tests due to nonstationary nature of vibration signals in these tests. The kernels of this ... -
Research on the Interior Noise Reduction of an Elastic Cavity by the Multipoint Panel Acoustic Contribution Method Based on Moore–Glasberg Loudness Model
(The American Society of Mechanical Engineers (ASME), 2014)More and more attention has been paid to reduce the low frequency interior noise of the elastic cavity, such as automobiles, ships, airplanes, and railway vehicles, to provide the more comfortable riding environment for ... -
Three Dimensional Natural Vibration Analysis With Meshfree Solution Structure Method
(The American Society of Mechanical Engineers (ASME), 2014)This paper describes the pioneering application of the meshfree solution structure method (SSM) to computer simulation of natural vibrations of 3D mechanical parts and structures. Using several carefully chosen examples, ... -
Transmission of Engine Harmonics to Synchronizer Mechanisms in Dual Clutch Transmissions
(The American Society of Mechanical Engineers (ASME), 2014)Synchronizer mechanisms play an important role in the selection and engagement of gears in manual, automated manual, and dual clutch transmissions (DCTs). These mechanisms rely heavily on the balancing of torque loads in ... -
State Dependent Delay Influenced Drill String Oscillations and Stability Analysis
(The American Society of Mechanical Engineers (ASME), 2014)In this paper, the authors present a discrete system model to study the coupled axial–torsional dynamics of a drill string. The model is developed taking into account statedependent time delay and nonlinearities due to ... -
Experimental Assessment of a New Fuzzy Controller Applied to a Flexible Rotor Supported by Active Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2014)The aim of this study was to develop and implement a new control approach dedicated to turbomachinery. The new, fuzzy based controller utilizes inputs expressed in polar coordinates. Its originality is that it manages two ... -
Characterization of Variable Hydrodynamic Coefficients and Maximum Responses in Two Dimensional Vortex Induced Vibrations With Dual Resonances
(The American Society of Mechanical Engineers (ASME), 2014)A phenomenological model and analytical–numerical approach to systematically characterize variable hydrodynamic coefficients and maximum achievable responses in twodimensional vortexinduced vibrations with dual twotoone ...