scholarly journals Multiple pulse traveling wave excitation of neon-like germanium

1995 ◽  
Author(s):  
J. C. Moreno ◽  
J. Nilsen ◽  
L. B. Da Silva
Keyword(s):  
Traveling Wave ◽  
Wave Excitation ◽  
Multiple Pulse

scholarly journals Multiple pulse traveling wave excitation of neon-like germanium

10.2172/73000 ◽  
1994 ◽  
Author(s):  
J.C. Moreno ◽  
J. Nilsen ◽  
L.B. Da Silva
Keyword(s):  
Traveling Wave ◽  
Wave Excitation ◽  
Multiple Pulse

Generalized Linford formula and its application to Traveling Wave Excitation

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-285-Pr2-288
Author(s):  
R. Tommasini ◽  
E. E. Fill
Keyword(s):  
Traveling Wave ◽  
Wave Excitation

scholarly journals Experimental Investigation on a Bladed Disk with Traveling Wave Excitation

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 3966
Author(s):  
Luigi Carassale ◽  
Elena Rizzetto
Keyword(s):  
Data Processing ◽  
Traveling Wave ◽  
Frequency Response Function ◽  
Wave Excitation ◽  
Test Rig ◽  
Real Situation ◽  
Bladed Disk ◽  
Experimental Identification ◽  
Alternative Techniques ◽  
Processing Techniques

Bladed disks are key components of turbomachines and their dynamic behavior is strongly conditioned by their small accidental lack of symmetry referred to as blade mistuning. The experimental identification of mistuned disks is complicated due to several reasons related both to measurement and data processing issues. This paper describes the realization of a test rig designed to investigate the behavior of mistuned disks and develop or validate data processing techniques for system identification. To simplify experiments, using the opposite than in the real situation, the disk is fixed, while the excitation is rotating. The response measured during an experiment carried out in the resonance-crossing condition is used to compare three alternative techniques to estimate the frequency-response function of the disk.

On the Response of Modulated Doublet Modes to Traveling Wave Excitation

2000 ◽  
Author(s):  
J. Y. Chang ◽  
J. A. Wickert
Keyword(s):  
Periodic Structure ◽  
Traveling Wave ◽  
Illustrative Case ◽  
Wave Excitation ◽  
State Response ◽  
The Individual ◽  
Limiting Case ◽  
Backward Propagation ◽  
Fourier Harmonics ◽  
Split Frequency

Abstract The forced vibration of arotationally periodic structure when subjected to traveling wave excitation is discussed, with emphasis placed on the steady-state response of doublet modes having either repeated or split frequencies. Such vibration modes have spatially modulated shapes defined by (i) the numbers of nodal diameters present in the limiting case of axisymmetry, and (ii) certain additional, superposed, contaminating Fourier harmonics which distort their appearances. The natural frequency and mode structure of a model periodic structure is discussed in the context of an otherwise axisymmetric disk having evenly-spaced, sector-shaped, line distributions of stiffness and inertia. Through a perturbation analysis, the contamination wavenumbers present in a doublet having repeated frequency are shown to comprise two subsets, the members of which have sine and cosine coefficients of the same, or of differing, signs for each wavenumber present in the mode shape’s Fourier expansion. That structure for the wavenumber content is explored further with respect to the response of repeated and split doublets to a harmonic traveling wave excitation. The individual Fourier components comprising a modulated doublet mode shape can propagate in the same direction as the excitation, or opposite to it, depending on the wavenumber of the excitation and the subset to which the contamination wavenumber belongs. The response of the split frequency doublets and the circumstances under which traveling or standing wave responses, or a blend of the two, can occur in the structure’s reference frame are examined and discussed in the context of the model periodic structure. The qualitative character of the response, the forward or backward propagation direction of each mode’s constituent wavenumber components, and the phase speeds of those components are discussed in illustrative case studies.

Traveling wave excitation and amplification of neon-like germanium 3p–3s transitions

1994 ◽  
Vol 110 (5-6) ◽  
pp. 585-589 ◽  
Author(s):  
J.C. Moreno ◽  
J. Nilsen ◽  
L.B. Da Silva
Keyword(s):  
Traveling Wave ◽  
Wave Excitation

Traveling wave excitation for FEM simulation of RF SAW/BAW devices

2017 ◽  
Author(s):  
Xinyi Li ◽  
Jingfu Bao ◽  
Yulin Huang ◽  
Benfeng Zhang ◽  
Tatsuya Omori ◽  
...  
Keyword(s):  
Traveling Wave ◽  
Fem Simulation ◽  
Wave Excitation

Nonlinear Seismic Response Analysis of Cable-Stayed Bridge under Uniform and Traveling-Wave Excitations

2015 ◽  
Vol 744-746 ◽  
pp. 793-798
Author(s):  
Kai Yan Xu
Keyword(s):  
Traveling Wave ◽  
Response Analysis ◽  
Wave Excitation ◽  
The Finite Element Method ◽  
Seismic Response Analysis ◽  
Nonlinear Seismic Response ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Flexible Component ◽  
Method Model

The finite element method model of a 670.56m span cable-stayed bridge was established and the dynamic characteristic and nonlinear earthquake-responses of it under uniform and traveling-wave excitations were systematic studied. Results show that: 1) its former 10 rank frequency are located very dense which shows that more modes shape should be considered when dealing with the dynamic analysis. 2) The traveling-wave excitation has greater effect on long-span cable-stayed bridge, especially on the more flexible component and great attention should be paid to the design of such kind of bridge.

Sign in / Sign up

Export Citation Format

Share Document