Journal of Vibration and Acoustics: Recent submissions
Now showing items 2201-2220 of 3913
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Numerical and Experimental Investigation of the Acoustic and Flow Performance of Intake Systems
(The American Society of Mechanical Engineers (ASME), 2002)This paper investigates the acoustic and flow performance of an intake system using numerical and experimental techniques. The acoustic and flow performances are characterized by computing the ... -
On Friction Damping Modeling Using Bilinear Hysteresis Elements
(The American Society of Mechanical Engineers (ASME), 2002)Massless bilinear hysteresis elements are often used to model frictional energy dissipation in dynamic systems. These quasi-static elements possess only two describing parameters, the damper stiffness ... -
Subspace-Based System Identification for an Acoustic Enclosure
(The American Society of Mechanical Engineers (ASME), 2002)This paper is aimed at identifying a dynamical model for an acoustic enclosure, a duct with rectangular cross section, closed ends, and side-mounted speaker enclosures. Acoustic enclosures are ... -
On the Absorption Coefficient of Porous Corrugated Surfaces
(The American Society of Mechanical Engineers (ASME), 2002)A classical way of improving acoustical absorption performances of porous materials is the use of corrugated surfaces; this use can obtain lower cut-off frequencies and also improve the overall ... -
Structural Acoustic Optimization of a Composite Cylindrical Shell Using FEM/BEM
(The American Society of Mechanical Engineers (ASME), 2002)A finite element/boundary element design tool is used to perform a structural acoustic optimization on an eight-ply graphite epoxy cylindrical shell. The shell is subject to two external monopole ... -
A Simple Formula for Evaluating the Fundamental Frequency Parameter of Initially Stressed Uniform Beams on Elastic Foundation
(The American Society of Mechanical Engineers (ASME), 2002)A simple design formula is derived here to evaluate the fundamental frequency parameter of initially stressed (subjected to axial concentrated load at the ends) uniform beams resting on elastic ... -
Two-Frequency Oscillation With Combined Coulomb and Viscous Frictions
(The American Society of Mechanical Engineers (ASME), 2002)In this paper, a mass-spring-friction oscillator subjected to two harmonic disturbing forces with different frequencies is studied for the first time. The friction in the system has combined ... -
Transmissibility as a Differential Indicator of Structural Damage
(The American Society of Mechanical Engineers (ASME), 2002)This article discusses the use of frequency domain transmissibility functions for detecting, locating, and quantifying damage in linear and nonlinear structures. Structural damage affects both the ... -
A Comparative Study and Analysis of Semi-Active Vibration-Control Systems
(The American Society of Mechanical Engineers (ASME), 2002)Semi-active (SA) vibration-control systems are those which otherwise passively generated damping or spring forces are modulated according to a parameter tuning policy with only a small amount of ... -
Nonlinear Control of a Shape Memory Alloy Actuated Manipulator
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents a nonlinear, robust control algorithm for accurate positioning of a single degree of freedom rotary manipulator actuated by Shape Memory Alloy (SMA). A model for an SMA ... -
Lancaster’s Method of Damping Identification Revisited
(The American Society of Mechanical Engineers (ASME), 2002)Identification of damping is an active area of research in structural dynamics. In one of the earliest works, Lancaster [1] proposed a method to identify the viscous damping matrix from measured ... -
H2 Optimization of the Three-Element Type Dynamic Vibration Absorbers
(The American Society of Mechanical Engineers (ASME), 2002)The dynamic vibration absorber (DVA) is a passive vibration control device which is attached to a vibrating body (called a primary system) subjected to exciting force or motion. In this paper, ... -
Constrained Layer Damping Treatments for Microstructures
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents a bulk micromachining process to fabricate micro-constrained layer treatments (MCLT) on a microstructure to increase its damping, and demonstrates the damping improvement through ... -
A Stochastic Averaging Approach for Feedback Control Design of Nonlinear Systems Under Random Excitations
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents a method for designing and quantifying the performance of feedback stochastic controls for nonlinear systems. The design makes use of the method of stochastic averaging to ... -
Exact Solutions for Vibration of Multi-Span Rectangular Mindlin Plates
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents the first-known exact solutions for the vibration of multi-span rectangular Mindlin plates with two opposite edges simply supported. The Levy type solution method and the ... -
Closed-Form Solutions to the Exact Optimizations of Dynamic Vibration Absorbers (Minimizations of the Maximum Amplitude Magnification Factors)
(The American Society of Mechanical Engineers (ASME), 2002)A typical design problem for which the fixed-points method was originally developed is that of minimizing the maximum amplitude magnification factor of a primary system by using a dynamic ... -
Physical Realization of Generic-Element Parameters in Model Updating
(The American Society of Mechanical Engineers (ASME), 2002)The selection of parameters is most important to successful updating of finite element models. When the parameters are chosen on the basis of engineering understanding the model predictions are ... -
Design of an Adaptive Vibration Absorber to Reduce Electrical Transformer Structural Vibration
(The American Society of Mechanical Engineers (ASME), 2002)This paper considers the design of a vibration absorber to reduce structural vibration at multiple frequencies, with an enlarged bandwidth control at these target frequencies. While the basic ... -
Effects of Boundary Flexibility on the Vibration of a Continuum With a Moving Oscillator
(The American Society of Mechanical Engineers (ASME), 2002)In this paper, the problem of an oscillator traversing an elastically supported continuum is studied. The flexibility in the boundaries of the continuum is modeled by linear, transverse springs. ... -
Spatially Continuous Power Flow Using a Scanning Laser Doppler Vibrometer
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents the validation of an experimental technique that maps the transfer of energy in vibrating structures. The technique is known as Experimental Spatial Power Flow (ESPF) and ...