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Showing 1 to 7 of 7 for “"Eigenfrequencies"”.
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Acoustic mode quantization in nanostructures
… bulk. Based on elasticity theory, the eigenfrequencies of these modes have been calculated and they agree well with the experimental data. Furthermore, by fitting the calculated mode frequencies to the experimental ones, the elastic properties of these nanostructures have been …
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Forced Capillary-Gravity Waves in a 2D Rectangular Basin
… to the boundary is close to the sum of two eigenfrequencies. In this case, the solvability conditions give a system of two differential equations for the complex valued amplitudes of the two eigenmodes. The system can be reduced to one real-valued differential equation. Its solutions yield …
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New Techniques for Time-Reversal-Based Ultra-wideband Microwave Pulse Compression in Reverberant Cavities
… compression gain is presented. The cavity eigenfrequencies are modeled after eigenvalues of random matrices satisfying the Gaussian orthogonal ensembles (GOE) condition. Cavity transfer functions are generated using Monte Carlo simulations, and used to compute the compression gains for many …
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Thermomechanics of helical strands and helical-fiber-reinforced rods
… of vibration are then derived, with the eigenfrequencies and mode shapes identified. Due to chirality, the longitudinal and torsional modes are coupled, as are the bending-shearing modes in the two principal directions of the cross section. The Timoshenko rod model for helical strands is …
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On the propagation of free topographic Rossby waves near continental margins
… then presented and discussed in some detail. The eigenfrequencies of the trapped modes decrease when S decreases and reduce to the short wave limit of Reid's (1958) second class, barotropic edge waves when S approaches zero. The modal structure broadens as S increases to some critical value above …
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Accurate numerical relativity simulations of non-vacuumspace-times in two dimensions and applications to critical collapse
… of the considerable difference found in the eigenfrequencies in the two cases, they concluded that the critical solution does not represent a system near equilibrium and in particular not a perturbed Tolmann-Oppenheimer-Volkoff (TOV) solution. In this Thesis we study the dynamics of the …
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ΣΤΑΤΙΚΗ ΚΑΙ ΔΥΝΑΜΙΚΗ ΕΠΙΛΥΣΗ ΤΟΥ ΚΥΛΙΝΔΡΙΚΟΥ ΠΛΑΙΣΙΟΥ ΠΛΕΓΜΑΤΟΣ
IN THIS THESIS A METHOD FOR THE STATIC AND DYNAMIC ANALYSIS OF A MULTICOLUMN AND MULTISTOREY CYLINDRICAL PLEXUS FRAME IS PRESENTED . THE FRAME CONSISTS OF A SYSTEM OF M HORIZONTAL CIRCULAR BEAMS I AND N VERTICAL STRAIGHT BEAMS J, WHICH ARE RECTANGULARLY INTERSECTED, SO THAT MXN RIGID JOINTS TO BE …