An experimental study on the inline wave force on a truncated vertical cylinder

ABSTRACT

Cylindrical structures are widely used in offshore engineering, such as the hard tank of a spar platform, columns of a semi-submersible, jackets, drilling pipes, risers and so on. Interactions between the waves and offshore structures are of great importance for engineering applications. This paper focuses on the inline wave force acting on a truncated vertical circular cylinder. Experimental studies are carried out in the wave tank at Shanghai Jiao Tong University in China. The diameter of the cylinder (D) is 10 cm and five submergence depths (h_s), i.e., h_s = 0.5D, 1D, 2D, 3D, 4D, are considered, respectively. The inline force is found to be influenced by the submerged depth of the cylinder, wave steepness and scatter parameter. High-harmonic wave forces and the second-load cycle are also discussed in the paper.

KEYWORDS:

• Inline wave force
• truncated vertical cylinder
• submerged depth
• second load cycle
• high-harmonic forces

Acknowledgements

This work was financially supported by Shanghai Yang Fan Program (Grant no. 15YF1406100) and National Natural Science Foundation of China (Grant no. 51239007). The authors would like to thank Mr. Huixiang Rong, Mr. Yanfei Deng and Mr. Lei Guan for their assistance on the test installations.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

Shanghai Yang Fan Program [grant number 15YF1406100]; National Natural Science Foundation of China [grant number 51239007].