A New Energy-Absorbing Device for Motion Suppression in Deep-Sea Floating Platforms

Energies

Xiaohui Zeng²  Yang Yu¹  Liang Zhang²  Qingquan Liu²  Han Wu² 

[1] Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;

关键词: novel S-shaped TLCD;    deep-sea floating platforms;    motion suppression;    sensitivity analysis;   

DOI  :  10.3390/en8010111

来源: mdpi

【 摘 要 】

Deep-sea floating platforms are one of the most important large structures for ocean energy exploitation. A new energy-absorbing device named S-shaped Tuned Liquid Column Damper (TLCD) has been invented for the suppression of the horizontal motion and vertical in-plane rotation of a deep-sea floating platform. A conventional tuned liquid column damper has a U-shaped water tunnel to absorb the excessive energy of the main structure. The application of U-shaped dampers in deep-sea floating platforms is difficult due to the restriction of a large horizontal length. A novel S-shaped damper is proposed to retain the same amount of liquid using a shorter S-shaped tunnel. Theoretical and experimental works are conducted and prove that an S-shaped damper needs less than half the horizontal length to provide the same suppression as a U-shaped damper. A coupling calculation model is proposed and followed by the sensitivity analysis. The study demonstrates the applicability of the novel S-shaped damper for the motion suppression in deep-sea floating platforms.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.