Fluid–Structure Interaction with Kelvin–Voigt Damping: Analyticity, Spectral Analysis, Exponential Decay

2021 ◽  
Author(s):  
Rasika Mahawattege ◽  
Roberto Triggiani
Keyword(s):  
Spectral Analysis ◽  
Exponential Decay ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction

scholarly journals Higher-Order Spectral Analysis to Identify Quadratic Nonlinearities in Fluid-Structure Interaction

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Imran Akhtar ◽  
Mohammad Elyyan
Keyword(s):  
Spectral Analysis ◽  
Nonlinear Interaction ◽  
Fluid Structure Interaction ◽  
Phase Relationship ◽  
Higher Order ◽  
Fluid Structure ◽  
Drag Coefficients ◽  
Structure Interaction ◽  
Quadratic Nonlinearities ◽  
Lift And Drag

Hydrodynamic forces on a structure are the manifestation of fluid-structure interaction. Since this interaction is nonlinear, these forces consist of various frequencies: fundamental, harmonics, excitation, sum, and difference of these frequencies. To analyze this phenomenon, we perform numerical simulations of the flow past stationary and oscillating cylinders at low Reynolds numbers. We compute the pressure, integrate it over the surface, and obtain the lift and drag coefficients for the two configurations: stationary and transversely oscillating cylinders. Higher-order spectral analysis is performed to investigate the nonlinear interaction between the forces. We confirmed and investigated the quadratic coupling between the lift and drag coefficients and their phase relationship. We identify additional frequencies and their corresponding energy present in the flow field that appear as the manifestation of quadratic nonlinear interaction.

FLUID STRUCTURE INTERACTION OF ROWING BLADE FOR HYDRODYNAMIC PROPULSION TO ENHANCE ROWING PERFORMANCE

2014 ◽  
Author(s):  
Abdul Aziz Mohd. Yusof ◽  
◽  
Ardiyansyah Syahrom ◽  
M. N. Harun ◽  
A. H. Omar
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Rowing Performance
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