Journal of Vibration and Acoustics: Recent submissions
Now showing items 2161-2180 of 3913
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Fourier Series Analysis of Epicyclic Gearbox Vibration
(The American Society of Mechanical Engineers (ASME), 2002)Synchronous averaging is difficult to use with epicyclic gear systems because the dominant frequencies are slightly skewed and asymmetrical. This Tech Brief uses Fourier series analysis to add ... -
Mesh Stiffness Variation Instabilities in Two-Stage Gear Systems
(The American Society of Mechanical Engineers (ASME), 2002)Mesh stiffness variation, the change in stiffness of meshing teeth as the number of teeth in contact changes, causes parametric instabilities and severe vibration in gear systems. The operating ... -
Coupled Vibration of Microcantilever Array Induced by Airflow Force
(The American Society of Mechanical Engineers (ASME), 2002)The coupled vibrations of microcantilevers induced by airflow were analyzed to facilitate the development of high-speed information and sensing devices that use microactuator arrays. Simple formulas, ... -
Continuous Model for the Transverse Vibration of Cracked Timoshenko Beams
(The American Society of Mechanical Engineers (ASME), 2002)A continuous model for the transverse vibrations of cracked beams including the effect of shear deformation is derived. Partial differential equations of motion and associated boundary conditions ... -
An Active-Passive Piezoelectric Absorber for Structural Vibration Control Under Harmonic Excitations With Time-Varying Frequency, Part 1: Algorithm Development and Analysis
(The American Society of Mechanical Engineers (ASME), 2002)It has been shown that piezoelectric materials can be used as passive electromechanical vibration absorbers by shunting them with electrical networks. Semi-active piezoelectric absorbers have also ... -
Viscosity Effects on the Propagation of Acoustic Transients
(The American Society of Mechanical Engineers (ASME), 2002)The propagation of an impulsive excitation applied at the origin of a lossy viscous medium is studied by operational techniques as the excitation advances through the medium. The solution of ... -
Reliability Analysis for Rotor Rubbing
(The American Society of Mechanical Engineers (ASME), 2002)The dynamic equations of the Jeffcott rotor with imbalance are concerned. The reliability of rotor systems with rubbing is examined. A statistical fourth moment method is developed to determine ... -
Aseismic Vibration Control of Flexible Rotors Using Active Magnetic Bearing
(The American Society of Mechanical Engineers (ASME), 2002)The wide application of active magnetic bearing (AMB) requires an aseismic evaluation with respect to AMB rotor vibrations caused by actual earthquakes. A flexible rotor supported by AMB is ... -
Interaction of Elastic Dilatational and Shear Waves With a Frictional Sliding Interface
(The American Society of Mechanical Engineers (ASME), 2002)The refraction and reflection of plane dilatational and shear waves, which are incident upon a sliding frictional interface between two elastic half-spaces, is considered. The contact interface ... -
Hybrid Active Noise Control of a One-Dimensional Acoustic Duct
(The American Society of Mechanical Engineers (ASME), 2002)Based on the closed-form solution of a one-dimensional wave equation, the primary, secondary and acoustic feedback paths for the active control of sound in an acoustic duct have been investigated. ... -
An Active-Passive Piezoelectric Absorber for Structural Vibration Control Under Harmonic Excitations With Time-Varying Frequency, Part 2: Experimental Validation and Parametric Study
(The American Society of Mechanical Engineers (ASME), 2002)In Part 1 of the paper, a new high-performance active-passive hybrid piezoelectric absorber concept was presented. This design is an attractive alternative to semi-active absorbers for the purpose ... -
Active Control of Low-Frequency Sound Radiation From Vibrating Panel Using Planar Sound Sources
(The American Society of Mechanical Engineers (ASME), 2002)Active control of low frequency sound radiation using planar secondary sources is theoretically investigated in this paper. The primary sound field originates from a vibrating panel and the ... -
Characterization and Detection of Crack-induced Rotary Instability
(The American Society of Mechanical Engineers (ASME), 2002)System instability and chaotic response are the failure modes that could significantly impact the reliability and operating safety of high-speed rotor-dynamical machines. Initiation and propagation ... -
Dynamics of a Flexible Beam Contacting a Linear Spring at Low Frequency Excitation: Experiment and Analysis
(The American Society of Mechanical Engineers (ASME), 2002)A detailed study of one-, two-, and three-impact per period motion of a vibro-impacting, pinned beam is presented involving experimental results, as well as one- and multi-degree-of-freedom ... -
Design of Robust Vibration Controller for a Smart Panel Using Finite Element Model
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents a model reduction method and uncertainty modeling for the design of a low-order H∞ robust controller for suppression of smart panel vibration. A smart panel with collocated ... -
Stick-slip Whirl Interaction in Drillstring Dynamics
(The American Society of Mechanical Engineers (ASME), 2002)This paper attempts to explain the complicated behavior of oilwell drillstring motion when both torsional stick-slip and lateral whirl vibration are involved. It is demonstrated that the observed ... -
Subharmonic and Chaotic Motions of a Hybrid Squeeze-Film Damper-Mounted Rigid Rotor With Active Control
(The American Society of Mechanical Engineers (ASME), 2002)The hybrid squeeze-film damper bearing with active control is proposed in this paper. The pressure distribution and the dynamics of a rigid rotor supported by such bearing are studied. A PD ... -
Analytical Solutions to H∞ and H2 Optimization of Dynamic Vibration Absorbers Attached to Damped Linear Systems
(The American Society of Mechanical Engineers (ASME), 2002)H∞ and H2 optimization problems of the Voigt type dynamic vibration absorber (DVA) are classical optimization problems, which have been already solved for a special case when the primary system ... -
Vibration Instability in Rolling Mills: Modeling and Experimental Results
(The American Society of Mechanical Engineers (ASME), 2002)Models for the occurrence of the vibrational instability during rolling known as third octave chatter are presented and discussed. An analysis of rolling mill chatter was performed for the ... -
Vibration Behavior and Simplified Design of Thick Rectangular Plates With Variable Thickness
(The American Society of Mechanical Engineers (ASME), 2002)A free vibration analysis and an optimal design approach have been presented for thick isotropic rectangular plates with varying thickness under general edge conditions. First, the analysis is ...