Volume 24, Issue 9 (September 2024)                   Modares Mechanical Engineering 2024, 24(9): 557-566 | Back to browse issues page

‎ 10.48311/mme.24.9.557

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
Asil Gharebaghi S, Shirzad M. Evaluation of hydrodynamic parameters in vortex-induced vibration of cylindrical structures with nonlinear support. Modares Mechanical Engineering 2024; 24 (9) :557-566
URL: http://mme.modares.ac.ir/article-15-77578-en.html
Evaluation of hydrodynamic parameters in vortex-induced vibration of cylindrical structures with nonlinear support
Saeed Asil Gharebaghi * 1, Mohammad Shirzad2
1- K. N. Toosi University of Technology , asil@kntu.ac.ir
2- K. N. Toosi University of Technology
Abstract:   (882 Views)
Vortex-induced vibration is a critical phenomenon that occurs in offshore structures and causes fatigue and damage to these structures. Previous studies show that these structures show complex and sometimes non-linear behavior. This study uses a rigid cylinder with non-linear support to evaluate the hydrodynamic parameters in these systems. The amount of non-linearity of the support has been changed, and its effect on the hydrodynamic parameters of the system has been investigated. The displacement and velocity of the cylinder were obtained by solving the two-dimensional Reynolds averaged Navier-Stokes and cylinder motion equations. The lift, potential, and vortex coefficients were calculated. Finally, the Strouhal number was determined. The results show that the system's behavior consists of two branches. In branch 1, the motion amplitude of the cylinder is small, but in branch 2, its amplitude is multiplied. By increasing the non-linearity of the support, the range of branch 2 becomes smaller, and the velocity of the cylinder oscillation increases. Raising the support non-linearity reduces the lift force and Strouhal number
Keywords: Vortex-Induced Vibration, Non-Linear Support, Hydrodynamics Parameters, Strouhal Number
Full-Text [PDF 978 kb]   (627 Downloads)    
Article Type: Original Research | Subject: Marine Structures
Received: 2024/10/20 | Accepted: 2024/11/22 | Published: 2024/08/31
Add your comments about this article : Your username or Email:
CAPTCHA
Send email to the article author

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.