Journal of Vibration and Acoustics: Recent submissions
Now showing items 3041-3060 of 3913
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Scattering of Structural Waves by Nonlinear Elastic Joints
(The American Society of Mechanical Engineers (ASME), 1993)An analytic study of the scattering of structural waves by nonlinear elastic joints is presented. Under the assumption of small nonlinearities and/or amplitudes of motion, an averaging methodology ... -
On the Symmetrization of Asymmetric Finite Dimensional Linear Dynamic Systems
(The American Society of Mechanical Engineers (ASME), 1993)A linear dynamic system with constant mass, and asymmetric damping and stiffness coefficient matrices, may be transformed to a symmetric system where all coefficient matrices are symmetric. This ... -
Radiation from Bending Waves in the Presence of a Flow Boundary Layer
(The American Society of Mechanical Engineers (ASME), 1993)The effect of refraction by a flow boundary layer on the radiation of sound from a bending wave on a plate is investigated. Based on the relative velocities of the bending wave and the ... -
Computation of the Eigenvalues of Wave Propagation in Periodic Substructural Systems
(The American Society of Mechanical Engineers (ASME), 1993)The wave propagation constants of periodic structures are computed using the exact dynamic stiffness matrix of a typical substructure. The approach used is to show that wave propagation and the ... -
Unbalance Response of a Dual Rotor System: Theory and Experiment
(The American Society of Mechanical Engineers (ASME), 1993)A dual rotor rig is developed and is briefly discussed. The rig is capable of simulating dynamically the two spool aeroengine, though it does not physically resemble the actual aeroengine ... -
On the Stability of Chain Drive Systems Under Periodic Sprocket Oscillations
(The American Society of Mechanical Engineers (ASME), 1992)Experimental observations have shown that periodic torsional oscillations of engine camshafts induced by powertrain loads can cause significant tension variation in the timing chain and magnify ... -
Computation of Acoustic Shape Design Sensitivity Using a Boundary Element Method
(The American Society of Mechanical Engineers (ASME), 1992)Numerical acoustic radiation prediction schemes have developed to the point where they can be used to reliably predict the acoustic response of a vibrating structure. However, the objective of ... -
Optimal Semi-Active Suspension with Preview Based on a Quarter Car Model
(The American Society of Mechanical Engineers (ASME), 1992)This paper deals with the synthesis of an optimal yet practical finite preview controller for a semi-active dissipative suspension system based on a two-degree-of-freedom (2-DOF) vehicle model. ... -
Advanced Analysis of Multi-Ring Liquid Seals
(The American Society of Mechanical Engineers (ASME), 1992)The equilibrium position of multi-ring seal assemblies is of major importance to the designer of high pressure centrifugal compressors. Typical computer codes now use a curve-fit of the Short ... -
Structural Damping Enhancement Via Non-Obstructive Particle Damping Technique
(The American Society of Mechanical Engineers (ASME), 1992)Presented herein is a novel passive vibration damping technique that is referred to as “Non-Obstructive Particle Damping (NOPD).” The NOPD technique consists of making small diameter holes (or ... -
Cross-Feedback Stabilization of the Digitally Controlled Magnetic Bearing
(The American Society of Mechanical Engineers (ASME), 1992)A method of stabilizing a high speed rotor supported by magnetic bearings is presented. The magnetic bearing is controlled by a digital controller with rotationally synchronized interruption. The ... -
Damped Absorber Optimization and Stability for Semi-Definite Systems Exhibiting Unstable Self-Excitation During Start-Up
(The American Society of Mechanical Engineers (ASME), 1992)Stability is examined with respect to the torque in the elastic element between motor and load in semi-definite systems exhibiting unstable self-excitation during start-up. Equations are provided ... -
Tracking Dynamics of In-line Suspensions in High-Performance Rigid Disk Drives with Rotary Actuators
(The American Society of Mechanical Engineers (ASME), 1992)The laser Doppler interferometric modal measurement technique is combined with finite element analysis to study the dynamics of in-line suspensions under actual operating conditions in commercially ... -
Observations of Subcritical Superharmonic and Chaotic Response in Rotordynamics
(The American Society of Mechanical Engineers (ASME), 1992)When a rotor, excited by unbalance, is operating eccentrically within a clearance and in local contact with the stator it behaves as a bilinear oscillator with a natural periodic motion that ... -
Dynamic Analysis of Engine-Mount Systems
(The American Society of Mechanical Engineers (ASME), 1992)This paper examines the forced response of an airplane engine supported by an elastic foundation. It is assumed that the vibrations of the engine and the foundation are small enough such that ... -
Approximate Analysis of the Forced Vibration Response of Plates
(The American Society of Mechanical Engineers (ASME), 1992)An approximate method is presented for the forced vibration analysis of plates. It is applicable in excitation frequency ranges close to resonances. A displacement shape for the plate in the ... -
On-Line Thermal Balancing Technique for a Large Turbo-Generator
(The American Society of Mechanical Engineers (ASME), 1992)In this paper a new technique is proposed to rebalance automatically a large turbo-generator during operation. The sensitivity of the rotor unbalances to thermal asymmetries in the rotor is ... -
Analysis of the Dynamics of a Type 4 Suspension
(The American Society of Mechanical Engineers (ASME), 1992)A finite element model of a suspension for read-write heads in disk drives is developed. The modelled vibration modes are compared with measurements and agree well in shape and frequency. The ... -
A Simple Technique for the Rapid Estimation of the Optimal Support Locations for a Vibrating Plate
(The American Society of Mechanical Engineers (ASME), 1992)This paper is aimed at presenting a simple technique for the rapid estimation of the optimal point support locations of vibrating plates. Using a two-dimensional nonlinear least-squares fit of ... -
Optimal Design of Vibration Absorber Systems Supported by Elastic Base
(The American Society of Mechanical Engineers (ASME), 1992)This paper presents the effect of foundation flexibility on the optimum design of vibration absorbers. Flexibility of the base is incorporated into the absorber system equations of motion through ...