scholarly journals Experimental Study on Wave Forces of Circular Cylinder in Crossing Wave Fields

1994 ◽  
Vol 10 ◽  
pp. 283-288
Author(s):  
Yoon-Koo Kang ◽  
Katsuhiko Kurata ◽  
Takashi Tomita ◽  
Masahiro Okata ◽  
Koichiro Iwata
Keyword(s):  
Experimental Study ◽  
Circular Cylinder ◽  
Wave Forces ◽  
Wave Fields

scholarly journals NONLINEAR METHOD FOR REAL-TIME WAVE FORCE RECONSTRUCTION ON A CYLINDER BY USING MEASURED WAVE ELEVATION

2020 ◽  
pp. 6
Author(s):  
Jiabin Liu ◽  
Anxin Guo
Keyword(s):  
Circular Cylinder ◽  
Real Time ◽  
Linear Method ◽  
Wave Force ◽  
Wave Forces ◽  
Frequency Wave ◽  
Wave Fields ◽  
Wave Elevation ◽  
Force Reconstruction ◽  
Incident Waves

For a constructed offshore structure, wave force evaluation on its foundation in an intricate wave field will benefit the load data collection and structural safety monitoring. Then, the collected data can provide valuable references for similar structures constructed in the same ocean region in the future. A real-time wave force prediction can further contribute to the active control of the structural dynamic responses. According to the incident waves known or unknown, the wave force reconstruction issue can be divided into two categories. When the incident waves are known, the wave forces on the cylinder can be achieved by the theoretical methods or numerical methods. When the incident waves are unknown, researchers try to reconstruct the wave force indirectly. For a small-scale cylinder, researchers predicted the wave forces by using the Morison equation in random wave fields with measured data of wave elevation. These studies indicated a shortcut for determining the wave force on the cylinder by using the data of water surface elevation. However, the wave fields are assumed to be undisturbed by the structure in the mentioned studies. For a vertical larger-scale cylinder, Liu et al. (2018) established a prediction method to reconstruct wave force by using the recorded data of wave elevation around the cylinder. A linear method for the circular cylinder is provided that shows an excellent reconstruction of wave force for its dominant frequent components. However, reconstruction results showed that high frequency wave forces are underestimated and low frequency wave forces are overestimated, which means the linear method is incapable to predict the nonlinear wave forces on the structure. An improved method is built for reconstructing wave forces on a circular cylinder in the real-time. Two different algorithms, Fast Fourier Translation (FFT) and Recursive Least Squares (RLS), for real-time reconstruction are conducted. The present method can be applied for the data collection of wave loads on a constructed offshore structure.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/PYOuCNP8pgQ

EXPERIMENTAL STUDY OF WAVE FORCES ON BRIDGE DECKS

2009 ◽  
Author(s):  
Billy L. Edge ◽  
Ronald McPherson ◽  
Oscar Cruz-Castro
Keyword(s):  
Experimental Study ◽  
Bridge Decks ◽  
Wave Forces

A numerical model for earthquake-induced hydrodynamic forces and wave forces on inclined circular cylinder

2020 ◽  
Vol 207 ◽  
pp. 107382 ◽  
Author(s):  
Piguang Wang ◽  
Xiaojing Wang ◽  
Mi Zhao ◽  
Xinglei Cheng ◽  
Xiuli Du
Keyword(s):  
Numerical Model ◽  
Circular Cylinder ◽  
Hydrodynamic Forces ◽  
Wave Forces

Experimental Study on the Wave Loads on Monopile and Jacket Type Support of Offshore Wind Turbines

2018 ◽  
Author(s):  
Jing Zhang ◽  
Qin Liu ◽  
Xing Hua Shi ◽  
C. Guedes Soares
Keyword(s):  
Experimental Study ◽  
Wind Turbine ◽  
Nonlinear Wave ◽  
Wave Force ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Wave Forces ◽  
Wave Loads ◽  
Morison Equation ◽  
Offshore Wind Turbines

As the offshore fixed wind turbine developed, more ones will be installed in the sea field with the depth 15–50 meters. Wave force will be one of the main forces that dominate the design of the wind turbine base, which is calculated using the Morison equation traditionally. This method can predict the wave forces for the small cylinders if the drag and inertia coefficients are obtained accurately. This paper will give a series scaled tests of monopile and jacket type base of the offshore wind turbine in tank to study the nonlinear wave loads.

Numerical and experimental study of the interaction between a vortex dipole and a circular cylinder

1995 ◽  
Vol 18 (3) ◽  
pp. 153-163 ◽  
Author(s):  
R. Verzicco ◽  
J. B. Flór ◽  
G. J. F. van Heijst ◽  
P. Orlandi
Keyword(s):  
Experimental Study ◽  
Circular Cylinder ◽  
Vortex Dipole
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