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Resonance

About: Resonance is a research topic. Over the lifetime, 44602 publications have been published within this topic receiving 711521 citations. The topic is also known as: Resonance.


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Journal ArticleDOI
TL;DR: The ν5 + ν10 band of cyclopropane (C3H6) centered at 2089.52 cm−1 has been measured and analyzed taking into account the l-type resonance effect described by Cartwright and Mills.

18 citations

Journal ArticleDOI
TL;DR: In this paper, peaks in the frequency spectrum excited by partial discharges are identified in each mode and the resonant characteristics of each mode are studied, which is indispensable to understand the partial discharge phenomena in GIS.
Abstract: Electromagnetic waves are used for detection of partial discharges (PD) in GIS (gas-insulated substations). A very wide frequency band up to 1.5 GHz is utilized for detection. There are three categories of electromagnetic wave which can be excited and propagate in coaxial cylindrical structures like GIS, namely, TEM, TE, and TM modes. The characterization and identification of each mode is indispensable to understanding the partial discharge phenomena in GIS. In this paper, peaks in the frequency spectrum excited by PD are identified in each mode and the resonant characteristics of each mode are studied. The following are the major results: (1) The resonance peaks appear at the frequencies defined by the spacer distance. (2) The intensity of each mode depends on the position of discharge source along the radial direction. The lower-order modes including TEM are excited when a discharge source is located near the center conductor. On the other hand, higher-order modes are excited when the discharge source is at the enclosure surface. (3) The experimental profile of each mode excited by PD along the radial direction approximately agrees with the general theory of electromagnetic wave propagation in coaxial cylindrical cavity. © 2000 Scripta Technica, Electr Eng Jpn, 131(2): 1–11, 2000

18 citations

Journal ArticleDOI
TL;DR: In this paper, the development of the unsteady pressure field on the floor of a rectangular cavity was studied at Mach 0.9 using high-frequency pressure-sensitive paint, which was tied to the superposition of a downstream-propagating shear-layer disturbance and an upstream-proagating acoustic wave of different amplitudes and convection velocities, consistent with the classical Rossiter model.
Abstract: The development of the unsteady pressure field on the floor of a rectangular cavity was studied at Mach 0.9 using high-frequency pressure-sensitive paint. Power spectral amplitudes at each cavity resonance exhibit a spatial distribution with a streamwise-oscillatory pattern; additional maxima and minima appear as the mode number is increased. This spatial distribution also appears in the propagation velocity of modal pressure disturbances. This behaviour was tied to the superposition of a downstream-propagating shear-layer disturbance and an upstream-propagating acoustic wave of different amplitudes and convection velocities, consistent with the classical Rossiter model. The summation of these waves generates a net downstream-travelling wave whose amplitude and phase velocity are modulated by a fixed envelope within the cavity. This travelling-wave interpretation of the Rossiter model correctly predicts the instantaneous modal pressure behaviour in the cavity. Subtle spanwise variations in the modal pressure behaviour were also observed, which could be attributed to a shift in the resonance pattern as a result of spillage effects at the edges of the finite-width cavity.

18 citations

Journal ArticleDOI
TL;DR: In this article, a model of describing parametric vibrations of a simply supported pipe conveying pulsating fluid is presented, where the three-dimensional motion equation of the system is a set of two nonlinear partial differential equations developed on the basis of Euler-Bernoulli beam theory, geometric nonlinearity and Kelvin-Voigt damping model.

18 citations

Journal ArticleDOI
TL;DR: In this article, the authors theoretically analyze the experimental observations of a spectral line collapse in a metamaterial array of asymmetric split ring resonators and show that the ensemble of closely-spaced resonators exhibits cooperative response, explaining the observed system size dependent narrowing of the transmission resonance linewidth.
Abstract: We theoretically analyze the experimental observations of a spectral line collapse in a metamaterial array of asymmetric split ring resonators [Fedotov et al., Phys. Rev. Lett. 104, 223901 (2010)]. We show that the ensemble of closely-spaced resonators exhibits cooperative response, explaining the observed system-size dependent narrowing of the transmission resonance linewidth. We further show that this cooperative narrowing depends sensitively on the lattice spacing.

18 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202217
2021984
20201,105
20191,246
20181,220
20171,197