Study of the Loadings and Local Scouring on an Innovative Carrier-Type Offshore Wind Turbine Foundation Caused by Wind, Wave and Current-2

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基本資料

Project title

Code/計畫編號

MOST103-2622-E006-016-CC2

Translated Name/計畫中文名

創新型離岸風力發電機載體式基座風波流動力負載與基座局部沖刷之研究-2

Project Coordinator/計畫主持人

Nan-Jing Wu

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

楊瑞源
賴啟銘
張珮錡
林大惠

Department/Unit

Tainan Hydrotech Laboratory,NCKU

Website

https://www.grb.gov.tw/search/planDetail?id=8176004

Year

2014

Start date/計畫起

01-02-2014

Expected Completion/計畫迄

31-01-2015

Bugetid/研究經費

4076千元

ResearchField/研究領域

機械工程
土木水利工程

離岸風機矗立於海中其承載平台機構與結構物本身基礎可能遭受波力作用，而離岸風機基礎部分亦可能因海底底床特性與水流互制作用有淘刷情形，此等機制現象恐造成離岸風機結構承載平台或載體式基座結構物之損壞或傾倒。因此，針對大橋舟公司所設計之創新型離岸風機載體式基座，藉由水工模型試驗先探討創新型離岸風機受風動力與波流水動力作用下支承基礎結構物之動力負載、風機運動模式等動態反應分析及基座周圍之地形沖刷、沖刷範圍與最大沖刷深度等相關研究探討，再依試驗結果研擬保護工方式及進行保護工模型試驗，藉由水工模型試驗配合數值方法作一整合性之研究與探討，而對工程上所可能遭遇之問題則可提供其發生之原因並預擬解決之方式。故產學計畫之重點在於創新型離岸風機結構物受風、波、流負載作用下對風機及支承結構之衝擊影響研究，以及結構物同時遭受波流水動力作用下基座周圍地形沖刷範圍與最大沖刷深度等之分析探討，並一併考量極端環境作用下創新型載體式離岸風機及支承結構之受力、動態反應分析及地形沖刷之探討。試驗結果顯示，經颱風波浪條件搭配海流及風速試驗後，風機機艙及塔柱之加速度主要振動頻譜為2.15 Hz與0.54 Hz，主要受到波浪週期作用之影響。而載體式基座展開保護工導流板後，流速21.4 cm/sec純流作用下最大沖刷深度可降低約22.3%；當颱風波與流同時作用下，最大沖刷深度可降低49.9%。 The foundation of offshore wind turbines, which are erected in the sea, could suffer the scouring caused by waves and currents. The severity of the scouring depends on the foundation type, characters of the sea bed, and the interaction between the flow and the structure. A miserable result which probably occurs is the damage of the foundation and the toppling of the structure. For this sake and under the consideration of machine and tool availability, the Ta-Chiao-Chou Yacht Building Company proposed a new concept of the design for the foundation. Interactions of the flow-structure and wave-structure should be studied to survey the loadings on the structure and the scouring around the foundation. In this study, the maximal scouring depth and range will firstly be observed in physical model experiments. Several protecting formulae will then be proposed according to the experimental observation. The effects of these protecting formulae will be evaluated by further physical model experiments. Numerical simulations, which will firstly be verified by the comparison with the experimental data, will also be carried out to reveal more detailed mechanism of the scouring. Therefore, the physical causes and processes of scouring near the foundation will be further understood. The focus of this project will be on the new-type foundation innovatively designed by the Ta-Chiao-Chou Yacht Building Company. However, the result of this project will not just for this company. It could also be a useful reference for the industrial companies who might encounter practical problems during the design and construction of the offshore wind turbine foundations. Information of these will be helpful to the offshore wind turbines industrials and will promote the green power technology of our country.

Keyword(s)

離岸風機
載體式基座
水工模型試驗
沖刷
保護工
Offshore wind turbines
carrier-type foundation
hydraulic model tests
scour
scour protection

DSpace CRIS

Study of the Loadings and Local Scouring on an Innovative Carrier-Type Offshore Wind Turbine Foundation Caused by Wind, Wave and Current-2

基本資料

Description