Journal of Vibration and Acoustics: Recent submissions
Now showing items 321-340 of 3913
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A Study of Nonlinear Behavior of Transformer Windings in Structural Degradation Detection
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, the transient vibration responses of power transformer windings subjected to the mechanical and electrical impacts are studied with the aim of detecting the structural degradation of windings. The axial ... -
The Influence of Additively Manufactured Nonlinearities on the Dynamic Response of Assembled Structures
(The American Society of Mechanical Engineers (ASME), 2020)Structural dynamic techniques have been proven accurate at predicting the vibrations of single parts (i.e., monolithic specimens), which are widely used in industrial applications. However, vibration analysis of such ... -
Conceptual Design of Oblong Ring Vibrators
(The American Society of Mechanical Engineers (ASME), 2020)An oblong ring-type structure is composed by two straight segments (length L) and two semicircular segments (radius R). It can be used to generate traveling waves, being applied to build linear piezoelectric motors and ... -
Toward Wideband Piezoelectric Harvesters Through Self-Powered Transitions to High-Energy Response
(The American Society of Mechanical Engineers (ASME), 2020)Convergence to low-energy responses arising from coexistence of multiple stable nodes is the main drawback of a nonlinear energy harvester preventing it from efficient wideband operation. A switching circuit with a boost-like ... -
Non-Linear Modeling and Parameter Identification of Semi-Active Engine Mounts With Air Spring
(The American Society of Mechanical Engineers (ASME), 2020)Car manufacturers have been motivated to apply semi-active engine mounts to ensure superior performance in vibration attenuation during idle condition and better ability to isolate vibration which is generated by engine ... -
Operational Control of Mixing Enhancement and Far-Field Jet Noise Suppression Using Downstream Fluidic Injection
(The American Society of Mechanical Engineers (ASME), 2020)A novel fluid injection scheme is analyzed for its ability to suppress the far-field jet noise using multiple radial microjets placed downstream from the nozzle exhaust. Contrary to other previous research studies, which ... -
Determination of Simultaneous Steady-State Movements Using Blade Tip Timing Data
(The American Society of Mechanical Engineers (ASME), 2020)Blade tip timing (BTT) includes a number of uncertainties that discourage its use. One of the main ones is the shift in the equilibrium position of the blade tip due to steady (non-oscillatory) bending and/or twisting of ... -
Optimum Design of a New Tuned Inerter-Torsional-Mass-Damper Passive Vibration Control for Stochastically Motion-Excited Structures
(The American Society of Mechanical Engineers (ASME), 2020)The inerter is referred to as a two-terminal device that provides inertial forces proportional to the relative accelerations between its two terminals. It has been widely applied in vibration control due to its mass ... -
Co-Integration-Based Compensation Technique for Dynamic Load Effects on the Electro-mechanical Impedance Method
(The American Society of Mechanical Engineers (ASME), 2020)The electro-mechanical (EM) admittance signals acquired from piezoelectric transducers (PZT) surface bonded to the host structure are often used for structural health monitoring (SHM). However, it is well known that the ... -
Constitutive Properties Determination of Human Cranium by an Experimental–Computational Modal Analysis
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, we identified the material constitutive parameters of the human skull from reported tensile test results. Initially, we applied both linear-elastic and Mooney–Rivlin nonlinear hyperelastic constitutive models ... -
Partitioned Coupling for Structural Acoustics
(The American Society of Mechanical Engineers (ASME), 2020)We expand the second-order fluid–structure coupling scheme of Farhat et al. (1998, “Load and Motion Transfer Algorithms for 19 Fluid/Structure Interaction Problems With Non-Matching Discrete Interfaces: Momentum and Energy ... -
Two- and Three-Dimensional Simulation of Sound Attenuation by Cylinder Arrays
(The American Society of Mechanical Engineers (ASME), 2020)A finite-difference time-domain (FDTD) simulation coupled with an immersed-boundary method is used to investigate sound attenuation through both two-dimensional (2D) and three-dimensional (3D) cylinder arrays. The focus ... -
Stability of Non-Axisymmetric Rotor and Bearing Systems Modeled With Three-Dimensional-Solid Finite Elements
(The American Society of Mechanical Engineers (ASME), 2020)Although rotors are simplified to be axisymmetric in rotordynamic models, many rotors in the industry are actually non-axisymmetric. Several authors have proposed methods using 3D finite element, rotordynamic models, but ... -
Vibration of Curvilinearly Stiffened Plates Using Ritz Method With Orthogonal Jacobi Polynomials
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents a general approach for the free vibration analysis of curvilinearly stiffened rectangular and quadrilateral plates using the Ritz method by employing classical orthogonal Jacobi polynomials. Both the ... -
Approximation Model for Radiation Impedance of a Square Piston Source on an Infinite Planar Baffle
(The American Society of Mechanical Engineers (ASME), 2020)Approximation models based on a finite sum of Bessel functions of the first kind and a pair of simple rational transfer functions are proposed for radiation resistance and reactance of a square piston source mounted on an ... -
Energy Harvesting Using a Torsional Mode L-Shaped Unimorph Structure: Modeling and Experimental Investigations
(The American Society of Mechanical Engineers (ASME), 2020)Previous studies have proved that the piezoelectric L-shaped beam-mass structure is a good candidate to harvest energy from ambient mechanical vibration. However, most researches merely focused on bending mode of the ... -
Uncertainty Quantification of Stochastic Impact Dynamic Oscillator Using a Proper Orthogonal Decomposition-Polynomial Chaos Expansion Technique
(The American Society of Mechanical Engineers (ASME), 2020)A proper orthogonal decomposition (POD)-based polynomial chaos expansion (PCE) is utilized in this article for the uncertainty quantification (UQ) of an impact dynamic oscillator. The time-dependent nonsmooth behavior and ... -
Dissipative Multiresonant Pillared and Trampoline Metamaterials With Amplified Local Resonance Bandgaps and Broadband Vibration Attenuation
(The American Society of Mechanical Engineers (ASME), 2020)The present study deals with the analysis of dissipative multiresonant pillared and trampoline effect–enhanced elastic metamaterials for the amplification of local resonance bandgaps. The study is conducted through a finite ... -
An Efficient Galerkin Averaging-Incremental Harmonic Balance Method Based on the Fast Fourier Transform and Tensor Contraction
(The American Society of Mechanical Engineers (ASME), 2020)An efficient Galerkin averaging-incremental harmonic balance (EGA-IHB) method is developed based on the fast Fourier transform (FFT) and tensor contraction to increase efficiency and robustness of the IHB method when ... -
Higher-Order Stabilized Perturbation for Recursive Eigen-Decomposition Estimation
(The American Society of Mechanical Engineers (ASME), 2020)Eigen-decomposition remains one of the most invaluable tools for signal processing algorithms. Although traditional algorithms based on QR decomposition, Jacobi rotations and block Lanczos tridiagonalization have been ...