Journal of Vibration and Acoustics: Recent submissions
Now showing items 2401-2420 of 3913
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Dynamic Gear Loads Due to Coupled Lateral, Torsional and Axial Vibrations in a Helical Geared System
(The American Society of Mechanical Engineers (ASME), 1999)In this paper we investigate the rotordynamics of a geared system with coupled lateral, torsional and axial vibrations, with a view toward understanding the severe vibration problems that occurred ... -
Evaluation of AMB Turbomachinery Auxiliary Bearings
(The American Society of Mechanical Engineers (ASME), 1999)The use of active magnetic bearings (AMB) for turbomachinery has experienced substantial growth during the past two decades. The advantages for many applications make AMB’s a very attractive ... -
Dynamic Instability of a Turbine Generator due to Microslip
(The American Society of Mechanical Engineers (ASME), 1999)The present paper is concerned with dynamic instability of a turbine generator due to friction between rotor slot wedges and the rotor. When the normal force on the wedge is constant the ... -
Ridge and Phase Identification in the Frequency Analysis of Transient Signals by Harmonic Wavelets
(The American Society of Mechanical Engineers (ASME), 1999)It is difficult to generate high-definition time-frequency maps for rapidly changing transient signals. New details of the theory of harmonic wavelet analysis are described which provide the basis ... -
Optimal Estimation of Dynamic Loads for Multiple-Input System
(The American Society of Mechanical Engineers (ASME), 1999)An optimal method is developed to estimate the dynamic loads for systems subjected to multiple inputs. The method focuses on minimizing the ensemble mean square error of the estimation. First, ... -
Damping Behavior Of Cantilevered Structronic Systems with Boundary Control
(The American Society of Mechanical Engineers (ASME), 1999)Distributed control of cantilever distributed systems using fully distributed piezoelectric layers has been investigated for years. The equivalent control actuation is introduced at the free end ... -
An In-situ Identification Method for Joint Parameters in Mechanical Structures
(The American Society of Mechanical Engineers (ASME), 1999)This paper presents an improved scheme based on the frequency response functions (FRFs) for in-situ identification of joint parameters of mechanical structures. Despite that measurement of FRFs ... -
An Efficient Analysis of High-Order Dynamical System with Local Nonlinearity
(The American Society of Mechanical Engineers (ASME), 1999)This paper deals with dynamical systems including spatially localized nonlinear substructures. In these cases, the differential equations of motion consist of the coupled linear and nonlinear ... -
Determining the Loss Factor by the Power Input Method (PIM), Part 1: Numerical Investigation
(The American Society of Mechanical Engineers (ASME), 1999)Damping must be accurately determined in the design and/or optimization of vehicle and aircraft trim. Yet, owing to the complexity of the dynamic interaction among the components in trimmed ... -
Vibration Control of Rotationally Periodic Structures Using Passive Piezoelectric Shunt Networks and Active Compensation
(The American Society of Mechanical Engineers (ASME), 1999)This paper proposes a multi-mode vibration suppression scheme for rotationally periodic structures. Identical active-passive hybrid piezoelectric networks are applied on each of the substructures, ... -
Free Vibration and Stability of a Spinning Disk-Spindle System
(The American Society of Mechanical Engineers (ASME), 1999)This work examines the free vibration and stability of a spinning, elastic disk-spindle system. The extended operator formulation is exploited to discretize the system using Galerkin’s method ... -
Adaptive Vibration Control by a Variable-Damping Dynamic Absorber Using ER Fluid
(The American Society of Mechanical Engineers (ASME), 1999)This paper describes a variable-damping dynamic absorber applying Electrorheological (ER) fluid to the damping element of a conventional-type dynamic absorber. A prototype of variable-damping dynamic ... -
A Theoretical Investigation of the Behavior of Droplets in Axial Acoustic Fields
(The American Society of Mechanical Engineers (ASME), 1999)This paper describes a theoretical investigation of the behavior of small droplets in an acoustic field. It was motivated by the increasing interest in the use of pulsations to improve the ... -
A New Lateral Vibration Damper Using Leaf Springs
(The American Society of Mechanical Engineers (ASME), 1999)The present paper introduces a new lateral vibration damper using leaf springs and oil. This damper, named as a leaf spring damper (LSD), has several beneficial rotordynamic advantages. The ... -
Analytical and Experimental Evaluation of an Air Damped Dynamic Vibration Absorber: Design Optimizations of the Three-Element Type Model
(The American Society of Mechanical Engineers (ASME), 1999)In this paper, we propose a dynamic vibration absorber (DVA) with an air damper consisting of a piston and a cylinder. First, it will be shown that the air damper can conveniently be ... -
Experimental Investigations on Noise Attenuation of a Twin Cylinder Stationary Diesel Engine with Different Types of Mufflers
(The American Society of Mechanical Engineers (ASME), 1999)Together with atmospheric and water pollution, noise pollution is threatening human society with vehicles constituting the major source of noise. The available literature on control measures (1, ... -
Stabilization of 1/3-Order Subharmonic Resonance Using an Autoparametric Vibration Absorber
(The American Society of Mechanical Engineers (ASME), 1999)The paper proposes a stabilization method for 1/3-Order subharmonic resonance with an autoparametric vibration absorber. A main system with nonlinear spring stiffness and harmonic excitation, i.e., ... -
Prediction of Machine Deterioration Using Vibration Based Fault Trends and Recurrent Neural Networks
(The American Society of Mechanical Engineers (ASME), 1999)High market competition for sales requires companies to reduce the cost of production if they are to maintain their market shares. Since the cost of maintenance contributes a substantial portion ... -
Modeling the Lateral Vibration of Hydraulic Turbine-Generator Rotors
(The American Society of Mechanical Engineers (ASME), 1999)An extensive hydro-generator rotordynamic model is presented along with a technique for determining imbalances and shaft misalignments using the model and mechanical run vibration measurements. The ... -
Structural-Acoustic Design at High Frequency Using the Energy Finite Element Method
(The American Society of Mechanical Engineers (ASME), 1999)Energy flow analysis methods, particularly as implemented using the finite element method, are useful as design techniques for high frequency structural-acoustic applications. In this paper, the ...