Results 261 to 270 of about 106,911 (302)

Energy-Injecting Virtual Mass Resonant Column System

Journal of Geotechnical and Geoenvironmental Engineering, 1998
An innovative resonant column control system is introduced. The system is based on the concepts of energy injection and virtual mass. A unique feature of the system is that it allows the user to specify the resonant frequency and vibrating amplitude for a specimen of unknown mechanical properties. In the system a steady state vibration is maintained by
Li, XS, Yang, WL, Shen, CK, Wang, WC
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Resonant Column Tests on Partially Saturated Sands

Geotechnical Testing Journal, 1991
Abstract This paper describes the measurement of the influence of capillary effects on the dynamic shear modulus of partially saturated sands. A Hall-type resonant column apparatus was used to perform the experiments. The materials tested included natural angular and subrounded sands, angular and subrounded sands with specified ...
X Qian, DH Gray, RD Woods
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Hydrodynamics of resonance oscillations of columns of inelastic particles

Physical Review E, 1999
We study oscillations of a one-dimensional (1D) column of N slightly inelastic particles, produced by a piston vibrating at one end of a closed tube. It is found that for large enough vibrational amplitudes of the piston, the column oscillates periodically with the period equal to the vibrational period.
A, Goldshtein, A, Alexeev, M, Shapiro
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Resonant Air Column in Wind Instruments

2019
Wind musical instruments are aerophone, producing sound through the vibration of an air column. A simplified model of a wind instrument includes the source of air, the sound generator, the resonating air column and the radiation of sound. If we make reference to how air column is excited by means of vibrating reed, the following classification of wind ...
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Parametric Resonance of Hopf Bifurcation in a Generalized Beck’s Column

Journal of Computational and Nonlinear Dynamics, 2008
A generalized damped Beck’s column under pulsating actions is considered. The nonlinear partial integrodifferential equations of motion and the associated boundary conditions, expanded up to cubic terms, are tackled through a perturbation approach.
PAOLONE, ACHILLE, ROMEO, Francesco, VASTA, M.   +2 more
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Resonant-Column Testing—Problems and Solutions

1978
The resonant-column test is a relatively nondestructive test employing wave propagation in cylindrical specimens of soil and rock. Test results are usually quite accurate, but in some cases insufficient coupling exists between specimen and apparatus or specimens are too stiff for a given apparatus, or both.
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PIV STUDY OF RESONANT AIR COLUMNS

Past, Present and Future Acoustics and EPSRC Day, 2023
A TONDDAST-NAVAEI, DB SHARP
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Kinetic Model of Tonks-Dattner Resonances in Plasma Columns

The Physics of Fluids, 1969
The linearized Vlasov equation is used to describe the coupling to plasma waves in bounded plasmas of externally driven quasistatic electric fields of frequency ω, treating as an example a cylindrically symmetric equilibrium. The coupling takes place at the plasma resonance, where ω equals the local plasma frequency.
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Resonance Densities in a Cylindrical Plasma Column

Physical Review Letters, 1963
BS>Interaction between an electromagnetic wave and a cylindrical plasma give rise to a resonance spectrum with a series of peaks at which the wave is strongly scattered. A measurement of the electron densities at which the resonances occur is given. A plasma-filled glass tube is situated in a waveguide with its axis perpendicular to the electric field ...
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Air column resonance spectra using basic laboratory equipment

American Journal of Physics, 1980
Common laboratory apparatus and readily available materials are used to generate resonance spectra of air columns. Frequency measurements of the harmonics of a column match very well with theoretical calculations. Three additional experiments are described, involving the end correction to the column length, tone holes in the side of the column and the ...
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