Higher-Order Spectral Analysis to Identify Quadratic Nonlinearities in Fluid-Structure Interaction
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-01-09
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Akhtar, Imran& Elyyan, Mohammad. 2018. Higher-Order Spectral Analysis to Identify Quadratic Nonlinearities in Fluid-Structure Interaction. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1206202
Modern Language Association (MLA)
Akhtar, Imran& Elyyan, Mohammad. Higher-Order Spectral Analysis to Identify Quadratic Nonlinearities in Fluid-Structure Interaction. Mathematical Problems in Engineering No. 2018 (2018), pp.1-14.
https://search.emarefa.net/detail/BIM-1206202
American Medical Association (AMA)
Akhtar, Imran& Elyyan, Mohammad. Higher-Order Spectral Analysis to Identify Quadratic Nonlinearities in Fluid-Structure Interaction. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1206202
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1206202