TIME-SEGMENTED FREQUENCY-DOMAIN ANALYSIS FOR NON-LINEAR MULTI-DEGREE-OF-FREEDOM STRUCTURAL SYSTEMS

2000 ◽  
Vol 237 (3) ◽  
pp. 457-475 ◽  
Author(s):  
W.J. MANSUR ◽  
J.A.M. CARRER ◽  
W.G. FERREIRA ◽  
A.M. CLARET DE GOUVEIA ◽  
F. VENANCIO-FILHO
Keyword(s):  
Frequency Domain ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Degree Of Freedom ◽  
Structural Systems ◽  
Non Linear

scholarly journals Numerical Study of Non-Linear Dynamic Behavior of an Asymmetric Rotor for Wave Energy Converter in Regular Waves

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1477
Author(s):  
Yoon-Jin Ha ◽  
Ji-Yong Park ◽  
Seung-Ho Shin
Keyword(s):  
Frequency Domain ◽  
Wave Height ◽  
Cfd Simulation ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Linear Motion ◽  
Regular Waves ◽  
Cfd Simulations ◽  
Non Linear ◽  
Wave Heights

This study conducted a numerical investigation on the non-linear motion problems between a Salter duck-type rotor and large waves using CFD simulations. Regular waves of five different wave heights were generated. First, the linear motion of the rotor from the CFD simulation was verified by comparing it with the existing experimental and frequency domain analysis results. Then, a series of CFD simulations were performed to investigate the non-linear motions of the rotor. In the case of a lower wave height, the CFD simulation results were in good agreement with the experimental and frequency domain analysis results. However, as the wave height increased, the resonance periods were different in each other. In addition, the magnitudes of normalized pitch motions by the wave heights decreased as the wave heights increased. To investigate the aforementioned phenomena, the pitch motion equation was examined using separate CFD simulations. The results showed that changing the restoring moments induced changes in the maximum pitch motions and magnitudes of the normalized pitch motions. In the case of a higher wave height, non-linear phenomena and the changing restoring moments induced non-linear motion.

A Volterra series approach to the frequency domain analysis of non-linear viscous Burgers’ equation

2012 ◽  
Vol 70 (3) ◽  
pp. 1753-1765 ◽  
Author(s):  
L. Z. Guo ◽  
Y. Z. Guo ◽  
S. A. Billings ◽  
D. Coca ◽  
Z. Q. Lang
Keyword(s):  
Frequency Domain ◽  
Burgers Equation ◽  
Volterra Series ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Non Linear

Time‐domain and frequency‐domain analysis of acoustic scattering by spheres

1994 ◽  
Vol 95 (5) ◽  
pp. 2478-2487 ◽  
Author(s):  
Peter D. Thorne ◽  
Terry J. Brudner ◽  
Kendall R. Waters
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Acoustic Scattering ◽  
Domain Analysis ◽  
Frequency Domain Analysis
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