Normal-mode statistics of sound scattering by a rough elastic boundary in underwater wave-guide in a full coupled mode approach, including back-scattering

2017 ◽  
Vol 141 (5) ◽  
pp. 3474-3474
Author(s):  
Andrey K. Morozov ◽  
John A. Colosi
Keyword(s):  
Normal Mode ◽  
Wave Guide ◽  
Sound Scattering ◽  
Coupled Mode ◽  
Elastic Boundary ◽  
Back Scattering

Correction to "Relation between normal-mode and coupled-mode analyses of parallel waveguides"

1985 ◽  
Vol 21 (7) ◽  
pp. 1120-1120
Author(s):  
E. Marom ◽  
O. Ramer ◽  
S. Ruschin
Keyword(s):  
Normal Mode ◽  
Coupled Mode

Vibration characteristics and thermoelastic analysis of the supersonic composite laminated panel with arbitrary elastic boundaries

2018 ◽  
Vol 233 (7) ◽  
pp. 2503-2517 ◽  
Author(s):  
Huagang Lin ◽  
Dengqing Cao ◽  
Yuqian Xu
Keyword(s):  
Ritz Method ◽  
Vibration Characteristics ◽  
Spring Stiffness ◽  
Aerodynamic Stability ◽  
Coupled Mode ◽  
Elastic Boundary ◽  
Laminated Panels ◽  
The Stability ◽  
New Phenomena ◽  
Admissible Functions

The novelty of this study is to present a theoretical approach to investigate the dynamic behaviors of the laminated panels under arbitrary elastic boundary conditions. The motion equations of panels considering the first order piston theory are derived using Hamilton principle. A solution of computing the vibration characteristics of a panel with arbitrary elastic boundaries is proposed based on the Rayleigh–Ritz method, in which the admissible functions are constructed by a set of characteristic orthogonal polynomials employing the Gram–Schmidt process; the support boundary is modeled by introducing the technology of artificial springs. The effects of spring stiffness and different boundaries on the dynamic characteristics and thermal aeroelastic behaviors are presented in detail. Numerical results show that the small ply angle and large spring stiffness are helpful to improve the aerodynamic stability. Multiple new phenomena have been observed, e.g. the phenomena of mode jumping and the alterations of coupled mode orders. Moreover, the thermal loads and aerodynamic loads play an opposite effect on the stability of composite panels.

scholarly journals Stability Boundaries in Laterally-Coupled Pairs of Semiconductor Lasers

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 74
Author(s):  
Martin Vaughan ◽  
Hadi Susanto ◽  
Nianqiang Li ◽  
Ian Henning ◽  
Mike Adams
Keyword(s):  
Semiconductor Lasers ◽  
Normal Mode ◽  
Dynamic Behaviour ◽  
Normal Modes ◽  
Stability Boundaries ◽  
Pumping Rate ◽  
One Dimensional ◽  
Coupled Mode ◽  
Normal Mode Theory ◽  
Laser Separation

The dynamic behaviour of coupled pairs of semiconductor lasers is studied using normal-mode theory, applied to one-dimensional (slab) and two-dimensional (circular cylindrical) real index confined structures. It is shown that regions of stable behaviour depend not only on pumping rate and laser separation, but also on the degree of guidance in the structures. Comparison of results between normal-mode and coupled-mode theories for these structures leads to the tentative conclusion that the accuracy of the latter is determined by the strength of self-overlap and cross-overlap of the symmetric and antisymmetric normal modes in the two lasers.

Relation between normal-mode and coupled-mode analyses of parallel waveguides

1984 ◽  
Vol 20 (12) ◽  
pp. 1311-1319 ◽  
Author(s):  
E. Marom ◽  
O. Ramer ◽  
S. Ruschin
Keyword(s):  
Normal Mode ◽  
Coupled Mode

Coupled mode analysis for a nonuniform tropospheric wave guide

Radio Science ◽  
1980 ◽  
Vol 15 (3) ◽  
pp. 667-673 ◽  
Author(s):  
James R. Wait
Keyword(s):  
Wave Guide ◽  
Mode Analysis ◽  
Coupled Mode
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