Results 241 to 250 of about 682,963 (292)

Kinetic resonances and stratification of the positive column of a discharge

Physical Review E, 2005
Resonance formation of the electron velocity distribution function (EDF) in an inert gas dc discharge at low pressures and small currents is analyzed on the basis of an accurate numerical solution of the Boltzmann kinetic equation in spatially periodic sinusoidally modulated striation-like fields. Calculations are performed for neon at pressures around
Yu B, Golubovskii, A Yu, Skoblo, C, Wilke, R V, Kozakov, J, Behnke, V O, Nekutchaev   +5 more
openaire   +2 more sources

Parametric resonance of viscoelastic columns

International Journal of Solids and Structures, 1969
Abstract The results of an analytical and experimental investigation of the effect of viscoelastic material behavior on the instability regions of a column subjected to a periodic axial load P 0 + P 1 cos ωt are presented. The complex modulus representation is used for the material.
K.K. Stevens, R.M. Evan-Iwanowski
openaire   +1 more source

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
openaire   +2 more sources

Parametric Resonances of Columns

2019
This chapter aims to give a general overview of the parametric resonances of columns under a harmonically pulsating force. In addition to simple resonance, combination resonances of sum and difference type are introduced, with columns having various kinds of boundary condition, other than pinned-pinned ends.
Yoshihiko Sugiyama, Mikael A. Langthjem, Kazuo Katayama   +2 more
openaire   +1 more source

Parametric Resonances of Columns with Damping

2019
This chapter discusses the mathematical aspects of parametric resonances of columns with damping, dealing generally with dynamical systems with damping. In addition to the first-order approximation for the resonance boundaries of Mathieu-Hill equations, an approach to the second-order approximation is suggested.
Yoshihiko Sugiyama, Mikael A. Langthjem, Kazuo Katayama   +2 more
openaire   +1 more source

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
openaire   +2 more sources

Resonance of a liquid column in a capillary tube

Zeitschrift für angewandte Mathematik und Physik, 1997
This paper deals with the interesting problem of oscillation of a fluid in a tube. A liquid column with height \(H\) is trapped in a circular tube of radius \(R\). The following assumptions are made: \(R\ll H\), contact lines are pinned, static contact angles are different from zero, the spherical cup approximation is valid.
Hilpert, Markus, Stopper, Dieter, Jirka, Gerhard H.   +2 more
openaire   +2 more sources

Resonant Column Testing of Agricultural Soils

Transactions of the ASAE, 1988
ABSTRACT REMOLDED cylindrical specimens and minimally-disturbed cylindrical samples of three types of agricultural soils were tested in a torsional-type resonant column device. The soils were tested at confining stresses close to zero to simulate field conditions.
null A. R. Womac, null F. D. Tompkins, null E. C. Drumm   +2 more
openaire   +1 more source

Resonances in a Cylindrical Plasma Column (Correspondence)

IEEE Transactions on Microwave Theory and Techniques, 1962
A plasma column irradiated by an electromagnetic wave which has its electric vector and direction of propagation perpendicular to the axis of the tube exhibits Tonks-Dattner resonances in its absorption pattern when the electron density in the column is varied.
J. Willis, I. Petroff
openaire   +1 more source

Internal Resonances of a Discharge Column

Journal of Applied Physics, 1964
Dipole resonance of a cold plasma column can be predicted quite simply and observed experimentally. It is normally accompanied, however, by a series of subsidiary resonances. These have recently been explained phenomenologically as depending on nonuniform electron density and nonzero electron temperature for their existence.
openaire   +1 more source