Research on Floating Body in Directional Spectrum Waves

定向谱波中浮体的研究

• 批准号: 04045026
• 负责人: HIRAYAMA Tsugukiyo
• 金额: $ 4.74万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04045026/
• 关键词: Floating Offshore Structures; Directional Spectrum Waves; Seakeeping Quality; Listed Condition; Slow Oscillation; 運動応答; 構造応答

Stable platform by floating offshore structures are required in the fields of oil production or ocean utilization, for example floating airport. For this purpose, research on the behaviors of such structures in directional spectrum waves namely realistic short crested irregular waves is important.In this joint project, the behaviors of offshore structures in directional spectrum waves were investigated both by theoretical and experimental manner taking into account the situation of both Japan and Brasil in the field of ocean developement.In the first year, observation on the spot was carried out in Brasil, and the basic experiments of model structures were carried out in Yokohama National University (Japan).In the second year, a program code was developed for estimating hydrodynamic forces acting on semi-submersible offshore structures by the method of so called singularity distribution method. From the view point of safety, lrgely listed conditin was also considered in this code. Simple estimation method for slow oscillation was also developed.In the final year, developed code was confirmed by the comparison with experimental results. Experiments of largely listed condition (about twenty degrees) were conducted for this purpose.Furthermore, not only drilling rig but also long and huge floating airport was treated from the view point of its behaviores in directional spectrum waves and the necessity of considering elastisity was made clear.

在石油开采和海洋利用等领域，需要一种稳定的浮式海洋结构平台，如浮式机场。为此，研究这种结构物在方向谱波即现实短峰不规则波中的行为是很重要的。在本联合项目中，考虑到日本和巴西在海洋开发领域的情况，从理论和实验两方面研究了海洋结构物在方向谱波中的行为。在第一年，第二年，在巴西进行了现场观测，在日本横滨国立大学进行了模型结构的基础实验，并编制了用奇异性分布法估算半潜式海洋结构物水动力的程序。从安全角度考虑，本规范也考虑了许可证所列条件。此外，还开发了慢振荡的简单估算方法，并在最后一年通过与实验结果的比较验证了开发的程序。为此，进行了大量列举条件（约20 °）的试验，并从方向谱波的角度，不仅对钻机，而且对长而大的浮动机场进行了处理，阐明了考虑弹性的必要性。

项目成果

平山次清、馬 寧: "長大浮体の方向スペクトル波中弾性応答及び保留系の挙動" 日本造船学会論文集. 176. 193-201 (1994)

Tsugukiyo Hirayama，宁马：“长浮体的方向谱波弹性响应和悬挂系统的行为”日本造船学会学报176。193-201（1994）。

平山次清他: "人工方向スペクトル波の波傾斜特性及び砕波限界" 関西造船協会誌. 221 (印刷中). (1994)

Tsukiyo Hirayama 等人：“人工定向谱波的波斜率特性和破波极限”关西造船协会杂志 221（出版中）。

竹沢誠二、平山次清 他: "方向スペクトル波中の超大型海洋構造物応答実験" 日本造船学会論文集. 172. 57-68 (1992)

Seiji Takezawa、Tsugukiyo Hirayama 等人：“定向谱波中大型海洋结构的响应实验”日本造船学会汇刊 172. 57-68 (1992)。

T.Hirayama, N,Ma, S.Ueno: "Influence of Flexibility on the Motions and Deflections of an Airport-oriented Floating Long Offshore Structure" International Conference on Hydroelasticity in Marine Technology. 377-387 (1994)

T.Hirayama、N、Ma、S.Ueno：“灵活性对机场导向浮动长海上结构的运动和偏转的影响”海洋技术水弹性国际会议。

平山次清、馬 寧、上野誠也: "長大柔軟構造物の方向スペクトル波中応答特性" 第12回海洋工学シンポジウム. 第12回. 145-154 (1994)

Tsugukiyo Hirayama，宁马，Seiya Ueno：“长柔性结构的方向谱波响应特性”第十二届海洋工程研讨会第12期（1994）。