The Responses of Huge Floating Structures for Ocean Space Utilization to High Waves and Strong Winds

制作了用于海洋空间利用的巨型半潜器的一部分的小比例尺半潜器模型，尽可能精确地考虑了甲板结构的弯曲刚度与重量之比。支撑桥面结构的柱子数量为21根，其中6根柱用不锈钢钢丝绳张拉系泊，在波浪水池中分别使用风帆和波浪发生器对模型单独或同时施加风浪。将模型相对于载荷方向的方向分4步改变，由于风帆出口尺寸小、位置高，在风荷载作用下的试验结果不够充分；另一方面，波浪荷载作用下的结果与为张拉腿平台分析而开发的计算机程序计算的结果进行了比较，但关联性还不够充分。可能需要进一步的改进，如考虑多个柱的波浪荷载相互作用的影响。

A small scale aclylic model of a part of a huge semisubmersible for ocean space utilization was fabricated paying as delicate attention as possible to the ratio of bending rigidity to weight of deck structure. The number of columns with footing supporting the deck structure was 21 and 6 columns of them were moored tautly by stainless steel wire ropes.Wind and waves were applied to the model solely or simultaneously by using a wind fun and wave generator,respectively,in the wave tank. The orientation of model with respect to loading direction was changed in 4steps.The tests under wind loading did not give sufficient results because the dimensions of outlet of the wind fun were small and thelocation was high.On the other hand,the results under wave loading were compared with the results calculated by a computer program developed for tension leg platform analysis.However,correlation is not sufficient yet. Some further improvement such as taking interaction effects of wave load for multi columns into consideration may be necessary.