Performance analysis of passive heave compensator operated with inclined piston using analytical method

• Published in: International journal of naval architecture and ocean engineering Vol. 16; p. 100624
• Main Author: Ku, Namkug
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2024; Elsevier
• Subjects: Drilling rig; Dynamic response analysis; Heave compensation system; Multi-body dynamics; Second order ODE; Second order ODE; Heave compensation system; Dynamic response analysis; Drilling rig; Multi-body dynamics
• ISSN: 2092-6782
• DOI: 10.1016/j.ijnaoe.2024.100624

When performing operations such as drilling in the ocean, floating platforms undergo vertical motion due to waves, which negatively impacts these operations. So passive heave compensator(PHC) is used to counteract it. In many studies, the analysis of PHC with pneumatic springs has been done. Some of these papers analyzed it using simple second-order differential equations, but there was no case of modeling considering the pneumatic spring installed tilted in the PHC. On the other hand, in some papers, the characteristics were analyzed by numerical methods using multi-body dynamics equations, and it is time consuming. Therefore, in this paper, a second-order ordinary differential equation modeling method for PHC with an inclined pneumatic spring was presented and verified by comparison with the numerical method. Using the model presented in this paper, it is possible to analyze as accurate as conventional analytical methods, and to analyze characteristics faster than numerical methods.