Supression on surge motion of tension-leg platform subjected to waves

In this study a typical tension-leg type platform incorporated with the TLCD (Tuned liquid column damper) device is studied. It is concerned that the stability of the platform besides the safety requirement when the platform is being used as a facility for public staying. However, to avoid the vibration induced from waves or wind loading is always a challenging task due to the difficulties of accurately monitoring the platform motion and applying the appropriate mitigation device to the system. The TLCD system by utilizing the water (liquid) sloshing power to reduce the vibration of the main structure is a newly developed device that could effectively reduce the vibrations for many kinds of structure. Therefore, an intuitive concept to apply the TLCD to the offshore structural system was carried out for this study. In the results of feasibility studies it is found that the accurately tuned TLCD system could effectively reduce the dynamic response of the offshore platform system in terms of the vibration amplitude of surge motion.