超大型浮体式構造物多点係留システムの定量的リスク解析

概要

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Very large floating structures, so-called VLFS or Mega-Floats, are the kind of social infrastructures.They are generally expected to keep their integrity for long period, for example, more than 100 years. So, it is necessary to investigate the reliability of the mooring system for VLFS in the severest condition to confirm their safety. In this paper, we paid our attention to dolphin-fender type mooring devices that pontoon type VLFS are equipped with. We considered the case that a large typhoon hits VLFS. The quantitative risk analysis was performed with using the results of time domain simulations of VLFS behavior in irregular waves, varying winds, and steady currents. As a method of evaluating slowly varying wave drift forces on VLFS, an integration method of squared relative wave height along the VLFS edges was used. Non-linear characteristics of fenders and dolphins are also taken into account.
独立行政法人海上技術安全研究所の論文
2003-11-14