Journal of Vibration and Acoustics: Recent submissions
Now showing items 701-720 of 3913
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An Optimal Ensemble Empirical Mode Decomposition Method for Vibration Signal Decomposition
(The American Society of Mechanical Engineers (ASME), 2017)The vibration signal decomposition is a critical step in the assessment of machine health condition. Though ensemble empirical mode decomposition (EEMD) method outperforms fast Fourier transform (FFT), wavelet transform, ... -
Comprehensive Analysis for Influence of Controllable Damper Time Delay on Semi-Active Suspension Control Strategies
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents a comprehensive comparison and analysis for the effect of time delay on the five most representative semi-active suspension control strategies, and refers to four unsolved problems related to semi-active ... -
Optimal Design and Experimental Study of a Multidynamic Vibration Absorber for Multifrequency Excitation
(The American Society of Mechanical Engineers (ASME), 2017)The inevitable manufacturing errors of rotational machineries cause vibration of multifrequency. This paper presents a multidynamic vibration absorber (MDVA) to suppress the vibration of multifrequency. The MDVA consists ... -
Nonsynchronous Vibration of Planar Autobalancer/Rotor System With Asymmetric Bearing Support
(The American Society of Mechanical Engineers (ASME), 2017)Due to inherent nonlinearity of the autobalancer, the potential for other, undesirable, nonsynchronous limit-cycle vibration exists. In such undesirable situations, the balancer masses do not reach their desired synchronous ... -
A Hermite Spline Layerwise Time Domain Spectral Finite Element for Guided Wave Prediction in Laminated Composite and Sandwich Plates
(The American Society of Mechanical Engineers (ASME), 2017)A new time domain spectral plate finite element (FE) is developed to provide fast numerical calculations of guided waves and transient phenomena in laminated composite and sandwich plates. A new multifield layerwise laminate ... -
Loads and Acoustics Prediction on Deployed Weapons Bay Doors
(The American Society of Mechanical Engineers (ASME), 2017)Unsteady separated flow from deployed weapons bay doors can interact with the highly unsteady flow in the open bay cavity, which is known to exhibit strong acoustic content and could lead to fluid-resonance and high-intensity ... -
Two Methods to Broaden the Bandwidth of a Nonlinear Piezoelectric Bimorph Power Harvester
(The American Society of Mechanical Engineers (ASME), 2017)We propose two methods to broaden the operation bandwidth of a nonlinear pinned–pinned piezoelectric bimorph power harvester. The energy-scavenging structure consists of a properly poled and electroded flexible bimorph ... -
Efficient Impedance Eductions for Liner Tests in Grazing Flow Incidence Tube
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents an efficient impedance eduction method for grazing flow incidence tube by using a surrogating model along with the Wiener–Hopf method, which enables rapid acoustic predictions and effective impedance ... -
Fault Diagnosis of Gearbox Using Particle Swarm Optimization and Second-Order Transient Analysis
(The American Society of Mechanical Engineers (ASME), 2017)Detection of faults in a gearbox is a first and foremost step before diagnostic and prognostic operations are performed. This paper proposes a novel gearbox fault detection and feature extraction technique. The proposed ... -
Nonlinear Energy Sink for Whole-Spacecraft Vibration Reduction
(The American Society of Mechanical Engineers (ASME), 2017)A nonlinear energy sink (NES) approach is proposed for whole-spacecraft vibration reduction. Frequency sweeping tests are conducted on a scaled whole-spacecraft structure without or with a NES attached. The experimental ... -
An Inverse Direct Time Domain Boundary Element Method for the Reconstruction of Transient Acoustic Field
(The American Society of Mechanical Engineers (ASME), 2017)An inverse direct time domain boundary element method (IDTBEM) is proposed for the reconstruction of transient acoustic field radiated by arbitrarily shaped sources. The method is based on the theory of direct time domain ... -
A New Incremental Harmonic Balance Method With Two Time Scales for Quasi-Periodic Motions of an Axially Moving Beam With Internal Resonance Under Single-Tone External Excitation
(The American Society of Mechanical Engineers (ASME), 2017)Quasi-periodic motion is an oscillation of a dynamic system characterized by m frequencies that are incommensurable with one another. In this work, a new incremental harmonic balance (IHB) method with only two time scales, ... -
Veering and Strong Coupling Effects in Structural Dynamics
(The American Society of Mechanical Engineers (ASME), 2017)Mode veering is the phenomenon associated with the eigenvalue loci for a system with a variable parameter: two branches approach each other and then rapidly veer away and diverge instead of crossing. The veering is accompanied ... -
Closed-Form Steady-State Response Solution of the Twin Rotor Damper and Experimental Validation
(The American Society of Mechanical Engineers (ASME), 2017)In previous research, the twin rotor damper (TRD), an active mass damper, was presented including control algorithms for monofrequent vibrations. In a preferred mode of operation, the continuous rotation mode, two eccentric ... -
Nonlinear Energy Sinks With Nontraditional Kinds of Nonlinear Restoring Forces
(The American Society of Mechanical Engineers (ASME), 2017)The nonlinear energy sink (NES) is usually coupled with a linear oscillator (LO) to rapidly transfer and immediately dissipate a significant portion of the initial shock energy induced into the LO. This passive energy ... -
Dynamic Response Analysis of Balance Drum Labyrinth Seal Groove Geometries Optimized for Minimum Leakage1
(The American Society of Mechanical Engineers (ASME), 2017)Annular labyrinth seals often have a destabilizing effect on pump rotordynamics due to the large cross-coupled forces generated when the fluid is squeezed by an oscillating rotor. In this study, several novel groove ... -
Dynamic Analysis of General Rotationally Symmetric Built-Up Structures Using a Modified Fourier Spectral Element Approach
(The American Society of Mechanical Engineers (ASME), 2017)A modified Fourier spectral element method (SEM) is developed to study vibration behaviors of general built-up systems that consist of various rotationally symmetric structures, including conical, cylindrical, and spherical ... -
Stationary Solution of Duffing Oscillator Driven by Additive and Multiplicative Colored Noise Excitations
(The American Society of Mechanical Engineers (ASME), 2017)A bistable Duffing oscillator subjected to additive and multiplicative Ornstein–Uhlenbeck (OU) colored excitations is examined. It is modeled through a set of four first-order stochastic differential equations by representing ... -
Experimental Study on Analytical Models for Predicting the Horn Effect of a Tire/Road Interface
(The American Society of Mechanical Engineers (ASME), 2017)The phenomenon that the tire/road noise is amplified when propagating outward from the hornlike geometry enveloped by the tire belt and the ground surface is referred to as the horn effect. In the present paper, three ... -
Vibrations of Flexible Multistage Rotor Systems Supported by Water-Lubricated Rubber Bearings
(The American Society of Mechanical Engineers (ASME), 2017)Flexible multistage rotor systems that are supported by water-lubricated rubber bearings (WLRBs) are seen in various engineering applications. Vibration analysis is important to design and performance of such dynamic ...