Results 221 to 230 of about 8,248 (263)

The Theory of the Dynamic Vibration Absorber

Transactions of the American Society of Mechanical Engineers, 1928
Abstract The “vibration absorber” discussed in this paper consists of a small vibratory system tuned to the operating frequency of a larger machine and attached to it in a suitable location. When properly designed this will reduce the vibrations of the machine itself materially.
J. Ormondroyd, J. P. Den Hartog
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A Study on Active Dynamic Absorber

13th Biennial Conference on Mechanical Vibration and Noise: Modal Analysis, Modeling, Diagnostics, and Control — Analytical and Experimental, 1991
Abstract Although it is known that active dynamic absorbers are useful for controlling vibration of structures, the design method for popular usage has not yet been established. This paper proposes the design method of the active dynamic absorber by use of the LQ optimum control theory.
Kazuto Seto, Yoshirou Furuishi
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The Dynamics of a Membrane Shock-Absorber

Mechanics Based Design of Structures and Machines, 2006
A common means to reduce the impact between two heavy colliding bodies is to interpose between them some sort of elastic buffer that can convert the kinetic energy of the heavy bodies into stored elastic energy. A device of this kind is called a shock absorber. In harbors, for example, bumpers are hung along pier walls or the hull of a ship in order to
VILLAGGIO, PIERO, LEITMAN M.
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The broadband dynamic vibration absorber

Journal of Sound and Vibration, 1982
The limited effectiveness of the linear passive dynamic vibration absorber is described. This is followed by an analysis producing the response of a primary system when a non-linear softening Belleville spring is used in the absorber. It is shown that the suppression bandwidth can be doubled by this means.
J.B. Hunt, J.-C. Nissen
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Vibration absorber with dynamic damper

The Journal of the Acoustical Society of America, 2008
In an engine mount (A) whose axis (X) is oriented in the front to rear direction of a vehicle, a damper weight ( 12 ) is embedded within a toroidal stopper rubber ( 10 ) fixed at its inner periphery to the rear end of an inner cylinder ( 2 ). The damper weight ( 12 ) is made of, for example, steel plate to have a spiral form and placed to surround the ...
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Dynamic Absorbers for Modern Powertrains

SAE Technical Paper Series, 2011
<div class="section abstract"><div class="htmlview paragraph">This paper describes the use of dynamic vibration absorbers in torque converters to reduce the torsional vibration levels of the vehicle drivetrain. The use of both tuned mass absorbers and centrifugal pendulum absorbers (CPA) are discussed. In the case of the tuned mass absorber,
Michael Swank, Patrick Lindemann
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A Thermoviscoelastic Dynamic Vibration Absorber

Journal of Applied Mechanics, 1998
A dynamic vibration absorber with a viscoelastic element is studied. The viscoelastic element is modeled as a material with memory in which the internal dissipative force depends on current, as well as previous deformations. The viscoelastic behavior is governed by two parameters: the relaxation modulus Go, and the relaxation time γ.
R. Fosdick, Y. Ketema
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Tuned dynamic vibration absorber

The Journal of the Acoustical Society of America, 1997
A vibration absorber is provided for reducing noise and vibration emanating from an electric motor, or another vibrating object, and the surrounding structure to which it is mounted. The vibration absorber has a beam with a mass secured thereto. The vibration absorber is mounted externally to the motor, in a direction perpendicular to an axis of ...
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The cruciform dynamic vibration absorber

The Journal of the Acoustical Society of America, 1984
The cruciform dynamic absorber comprises two free–free beams that are mass loaded at their free ends and that are joined centrally at right angles at a point at which they are attached to the vibrating item or structure of concern. Both a lumped simple system and distributed mechanical systems such as beams and clamped circular plates are considered ...
J. C. Snowdon, A. A. Wolfe, R. L. Kerlin
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The dynamics of super-absorbent hydrogels

2022
Super-absorbent polymers placed in water can form hydrogels with polymer fractions of less than 1% by volume, with the water molecules being adsorbed by the hydrophilic polymer to form an elastic material. They are used in disposable diapers, for soil remediation, for controlled drug delivery and as actuators in microfluidic devices. Hydrogels are also
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