EVALUATION OF SAFETY OF FLOATING ARTIFICIAL ISLANDS

人工浮岛的安全评价

• 批准号: 06402055
• 负责人: OHKUSU Makoto
• 金额: $ 11.07万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06402055/
• 关键词: Floating structure; Artificial island; Wave force; Wave observation

Ocean engineers are interested in concept of floating structures as large as several thousand meters long. This type of structures are intended to be used as, for example, floating airports unusual size of them may require new technology especially for accurate evaluation of their safety for very long period, say 100 years. Prediction of their safety must be extremely reliable with this type of structures. Objective of this project is to establish a new methodology for evaluating the safety of large floating structures of unusually large size and unusually large age expected. For this we have studied. (1) Response of floating structures, whose scale is comparable to the topographical scale, to stormy waves and its rational predicition method. (2) Improvement of reliability of wave forecast for very long period (100years) at the sites in particular, close to shore where the floating islands are expected to be deployed. Our results are as follows. (a) Analytical method to predict wave forces on a floating platform supported by numerous floats of vertical and truncated circular cylinder was developed and numerically implemented. In this method the topographical effect at shore region is accounted for mathematically correct way. (b) Hydroelastic behavior of large floating structure interacting sea was studied and its correct prediction method was proposed. (c) We proposed a new methodology of wave forecast at shore region and for very long years based on the wave observation data by the ocean tower of Research Institute of Applied Mechanics, Kyushu University and a new mathematical wave forecast model.

海洋工程师对长达数千米的浮动结构的概念感兴趣。这种类型的结构旨在用作例如浮动机场，它们的不寻常尺寸可能需要新技术，特别是为了准确评估它们在很长一段时间内的安全性，比如说100年。对于这种类型的结构，其安全性的预测必须非常可靠。本项目的目的是建立一种新的方法来评估异常大尺寸和异常大年龄的大型浮动结构的安全性。为此，我们进行了研究。(1)与地形尺度相当的浮式结构物对风浪的响应及其合理预测方法。(2)提高长时间（100年）波浪预报的可靠性，特别是在预期部署浮岛的海岸附近。我们的结果如下。(a)本文提出了一种计算浮式平台波浪力的解析方法，并进行了数值计算。该方法在数学上正确地考虑了海岸区的地形效应。(b)研究了大型浮式结构物在海水作用下的水弹性行为，并提出了正确的预报方法。(c)根据九州大学应用力学研究所海洋观测塔的波浪观测资料和一种新的波浪预报数学模型，提出了一种新的海岸区域和长时间波浪预报方法。

项目成果

大楠丹: "超大型浮体式海洋構造物に作用する波力に関する研究" 日本造船学会論文集第175号. 131-138 (1994)

Tan Ohkusu：“作用于超大型浮动海上结构的波浪力的研究”日本造船学会会刊，第 175. 131-138 号（1994 年）

大楠 丹: "Effect of sloping sea bottom on wave forces acting on a large floating platform" Proc. 7th International Conference on the Behaviour of Offshore Structures. 2. 877-888 (1994)

Tan Ohkusu：“倾斜海底对作用于大型浮动平台的波浪力的影响”，第七届国际海上结构行为会议。 2. 877-888 (1994)

M.OHKUSU: "Effect of Sloping Sea Bottom on Wave Forces Acting on a Large Floating Platform" Proc.7th International Conference on the Behavior of Offshore Structures. vol.2. 877-888 (1994)

M.OHKUSU：“倾斜海底对作用于大型浮动平台的波浪力的影响”Proc.7th 国际海上结构行为会议。

大楠丹: "Hydrodynamic Behavior of a Very Large Floating Platform in Waves" Proc.10th International Workshop on Water Waves and Floating Bodies,Hamburg Germany. (1996)

Ohkusutan：“波浪中超大型浮动平台的流体动力学行为”，第 10 届水波和浮动体国际研讨会，德国汉堡（1996 年）。

M.OHKUSU: "Wave Forces on Floating Platform on the Water of Varying Depth" Proc.10th International Workshoop on Water Waves and Floating Bodies. vol.1. 153-156 (1995)

M.OHKUSU：“不同深度水面上浮动平台上的波浪力”Proc.10th 国际水波和浮体研讨会。