A COMPREHENSIVE STUDY ON THE CONSTRUCTION OF MEGA-FLOATING ARTIFICIAL ISLANDS

大型人工浮岛建设的综合研究

• 批准号: 06302044
• 负责人: WATANABE Eiichi
• 金额: $ 5.76万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06302044/
• 关键词: Very Large Floating Structure; Floating Airport; Wind Force; Wave Response Analysis; Earthquake Response Analysis; Elastic Deformation

This study aims at a comprehensive study on the construction of Mega-floating structure such as floating artificial islands. The size of the structure may be several kilo-meters, which may include floating airport.Prof. Nagao studied on the wind resistant design of such a floating structure. In order to clarify it, he performed some experiments on the flat box-sectional models. It has been obtained that the wind force will be significantly affected by the close wind characteristics.Prof. Kitahara analyzed the fluid-elastic foundation-porous ground system subjected to earthquake excitations. The method employed is the Boundary Element Method, and the three domains are separately modeled, and are combined at their boundaries. The numerical results have shown that the submergence of the foundation to the ground will be effective in terms of the reduction of ground stresses.Prof. Funaki studied on large offshore structures moored by catenary lines, and the effect of the weight and stiffness of the catenary lines were examined. The nonlinear effect of the catenary lines are linearized based on the results of transient analysis by ABAQUS.Prof.Ueda studied the floating structure consisting of rectangular and half-circular shapes, and the hydrodynamic forces (diffraction and radiation forces) were analyzed by the source distribution method. The floating bridges were also studied, and the effect of elasticity of the superstructure were examined.Prof.Watanabe and Dr.Utsunomiya studied on the wave response analysis of large floating structure considering elastic deformation of the structure. The fluid and structural domains were both modeled by Finite Element Method, and the direct frequency method has been applied to wave response analysis. The HOBEM (Higher Order Boundary Element Method) program has also been developed, and the VLFS (very Large Floating Structure) has also been analyzed.

这项研究旨在综合研究大型浮动结构，例如浮动人造岛。结构的大小可能是几公斤，其中可能包括浮动机场。 Nagao研究了这种浮动结构的防风设计。为了澄清它，他在平板截面模型上进行了一些实验。已经获得的是，风力将受到近风特征的显着影响。 Kitahara分析了受到地震激发的流体弹性基础孔孔的地面系统。所采用的方法是边界元素方法，三个域是分别建模的，并在其边界上合并。数值结果表明，基础对地面的淹没将有效地减少地面应力。 Funaki研究了由链条线系泊的大型离岸结构，并检查了链条线的重量和刚度的影响。基于abaqus.prof.ueda的瞬态分析结果，将链条线的非线性效应线性化，研究了由矩形和半圆形形状组成的浮动结构，并通过源源分析了流体动力（衍射和辐射力）分布方法。还研究了浮桥，并检查了上层结构的弹性的影响。流体和结构结构域均通过有限元方法建模，并且直接频率方法已应用于波响应分析。还已经开发了HOBEM（高阶边界元素方法）程序，并且还分析了VLF（非常大的浮动结构）。

项目成果

Tomoaki Utsunomiya: "Development of Higher Order BEM Program for Wave Response Analysis of Very Large Floating Structures" Proc.of Civil Engineering in the Ocean. Vol.13. (1997)

Tomoaki Utsunomiya：“用于超大型浮动结构波浪响应分析的高阶 BEM 程序的开发”Proc.of Civil Engineering in the Ocean。

Tomoaki Utsunomiya: "Wave Response Analysis of a Flexible Floating Structure by BE-FE Combination Method" Proc.of the Fifth Intemational Offshore and Polar Engineering Conference. 400-405 (1995)

Tomoaki Utsunomiya：“利用 BE-FE 组合方法对柔性浮动结构进行波响应分析”第五届国际近海和极地工程会议论文集。

宇都宮智昭: "超大型箱形浮体の波浪応答解析のための高次要素BEMプログラムの開発" 海洋開発論文集. 13(印刷中). (1997)

Tomoaki Utsunomiya：“用于超大型箱形浮体波浪响应分析的高阶单元 BEM 程序的开发”海洋发展论文 13（出版中）。

上田茂: "Behavior of Floating Bridge under Wind and Wave Action" Proc.International Workshop on VLFS. (1996)

Shigeru Ueda：“风浪作用下浮桥的行为”Proc.International Workshop on VLFS（1996）。

宇都宮智昭: "弾性変形を考慮した大型ポンツーン浮体の波浪応答特性について" 海岸工学論文集. 42. 961-965 (1995)

Tomoaki Utsunomiya：“考虑弹性变形的大型浮桥浮体的波浪响应特性”海岸工程杂志 42. 961-965 (1995)。