Amplification of polarized steady-state and pulse signals by a regenerative traveling-wave quantum amplifier containing a Faraday unit

1982 ◽  
Vol 36 (3) ◽  
pp. 299-303
Author(s):  
G. P. Ledneva ◽  
Yu. I. Chekalinskaya ◽  
E. P. Chechenina
Keyword(s):  
Steady State ◽  
Traveling Wave ◽  
Quantum Amplifier

STABILITY OF STEADY STATE AND TRAVELING WAVES SOLUTIONS IN COUPLED MAP LATTICES

2008 ◽  
Vol 18 (01) ◽  
pp. 219-225 ◽  
Author(s):  
DANIEL TURZÍK ◽  
MIROSLAVA DUBCOVÁ
Keyword(s):  
Steady State ◽  
Essential Spectrum ◽  
Traveling Waves ◽  
Traveling Wave ◽  
Traveling Wave Solutions ◽  
Linear Operators ◽  
Coupled Map Lattices ◽  
Basic Tool ◽  
Wave Solutions ◽  
The Stability

We determine the essential spectrum of certain types of linear operators which arise in the study of the stability of steady state or traveling wave solutions in coupled map lattices. The basic tool is the Gelfand transformation which enables us to determine the essential spectrum completely.

On the Interaction of Multiple Traveling Wave Modes in the Flutter Vibrations of Friction-Damped Tuned Bladed Disks

2016 ◽  
Author(s):  
Malte Krack ◽  
Lars Panning-von Scheidt ◽  
Jörg Wallaschek
Keyword(s):  
Steady State ◽  
Traveling Wave ◽  
Basins Of Attraction ◽  
Unstable Wave ◽  
Stable Limit ◽  
Lumped Mass ◽  
Limit States ◽  
Bladed Disks ◽  
Bladed Disk ◽  
Wave Forms

The aerodynamic interference between the blades of a bladed disk can lead to self-excited vibrations known as flutter. Flutter vibrations can reach considerable levels and are thus of special concern in the design of turbomachines. The vibrations can be saturated in so-called limit cycles by the nonlinear dissipative effects related to dry friction in mechanical joints. For a given mode family of a tuned bladed disk, the flutter stability depends on the interblade phase angle, and often multiple traveling wave forms are unstable. In spite of this, previous investigations indicated that in the steady state, friction-damped flutter vibrations of tuned bladed disks are dominated by a single traveling wave component. In contrast, we demonstrate that, in fact, multiple traveling wave components may interact in the steady state. To this end, a phenomenological model is studied, which possesses one lumped mass per sector, elastic Coulomb friction inter-sector coupling, and two unstable traveling waves forms. Depending on the location of the complex eigenvalues of the linearized system, the steady-state vibrations are shown to be dominated by either of the two unstable wave forms or exhibit considerable contributions of both. Both periodic and quasi-periodic attractor forms are computed using Fourier methods and validated with direct time integration. Moreover, the basins of attraction of the different stable limit states are analyzed in detail. Remarkably, even if a stable, periodic vibration in a certain traveling wave is attained, a sufficiently strong instantaneous perturbation of the same form can give rise to a transient ending in a limit cycle with a different traveling wave character.

Auditory steady-state responses to chirp stimuli based on cochlear traveling wave delay

2007 ◽  
Vol 122 (5) ◽  
pp. 2772 ◽  
Author(s):  
Claus Elberling ◽  
Manuel Don ◽  
Mario Cebulla ◽  
Ekkehard Stürzebecher
Keyword(s):  
Steady State ◽  
Traveling Wave ◽  
Steady State Responses ◽  
Auditory Steady State Responses ◽  
State Responses

Reduced Plate Model Used for 2D Traveling Wave Propagation

2015 ◽  
Author(s):  
V. V. N. Sriram Malladi ◽  
Mohammad Albakri ◽  
Pablo A. Tarazaga ◽  
Serkan Gugercin
Keyword(s):  
Wave Propagation ◽  
Steady State ◽  
Traveling Wave ◽  
Degrees Of Freedom ◽  
Element Model ◽  
Reduction Techniques ◽  
Point Forces ◽  
State Frequency ◽  
Computationally Intensive ◽  
Time Domain Response

The focus of this study is to understand traveling wave generation and propagation in reduced order 2D plate models. A plate with all clamped (C-C-C-C) boundary conditions was selected to be the medium through which the wave propagation occurs. The plate is excited at multiple locations by point forces which generates controlled oscillations resulting in net traveling waves. A finite element model is developed and the traveling wave response is simulated. The numerical model is complex with a large number of degrees-of-freedom making a parametric study computationally intensive. In order to overcome this computational burden, balanced truncation based and interpolation-based model reduction techniques are employed to reduce the total number of degrees-of-freedom. The capabilities of these reduction techniques to capture the steady-state frequency-domain characteristics and the steady-state time-domain response have been compared in this paper.

Sign in / Sign up

Export Citation Format

Share Document