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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 馬開東 | zh_TW |
| dc.contributor.advisor | Kai-Tung Ma | en |
| dc.contributor.author | 五十嵐雪姬 | zh_TW |
| dc.contributor.author | Yuki Igarashi | en |
| dc.date.accessioned | 2023-09-22T17:46:18Z | - |
| dc.date.available | 2023-11-09 | - |
| dc.date.copyright | 2023-09-22 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2023-08-08 | - |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90186 | - |
| dc.description.abstract | 本研究旨在探究加重塊在極端海況和淺水環境中對2兆瓦浮動式離岸風力發電機繫泊系統的影響。研究主要關注浮台六個自由度的極限值以及錨鏈的最大張力以探討加重塊對於繫泊系統的影響, 包含了加重塊相關的三個參數。分別爲加重塊的起始位置、加重塊的間距以及加重塊的數量。分析的目的是評估這些參數的改變如何影響繫泊系統的性能。研究結果顯示，將加重塊起始位置設定於著陸點之後的地方具有相對較好的性能。當加重塊之間的間距過小，以本研究爲例爲2米和3米時，錨鏈會出現局部極端的張力。由於加重塊在極端環境條件下會被全部被拉起，離開海床，因此加重塊越多，錨鏈的最大張力越大，而造成此結果的原因可能主要來自加重塊總重量的差異。通過針對參數的探討，發現加入加重塊後的系統在淺水海域極限條件的情況下并沒有優化繫泊系統的性能。因此本研究建議進行進一步的研究，以探索在淺水環境中使用加重塊來優化繫泊系統的可行性和潛在優勢。 | zh_TW |
| dc.description.abstract | This study aims to investigate the influence of the clump weight on a 2 MW floating offshore wind turbine (FOWT) mooring system, focusing on extreme sea conditions and shallow water effects. This study primarily focuses on the extreme values of the 6 degrees of freedom (6 DoF) and the maximum line tension of the mooring lines to assess the impact of clump weights on the mooring system. Three parameters related to the clump weight were studied, including the starting position of clump weights, spacing between clump weights, and the number of clump weights. The objective was to evaluate the performance differences resulting from these parameters on the effectiveness of the clump weights. The findings indicate that selecting a starting position for the clump weights located after the touchdown point has relatively better performance. When the spacing between clump weights is too small, in this case, 2 meters and 3 meters, localized extreme line tension may occur. Due to the fact that clump weights will all be lifted from the seabed under extreme environmental conditions, the more clump weights there are, the greater the maximum tension along mooring lines. The possible reason for this outcome may primarily lie in the total weight of the clump weights. In the case of shallow water, the inclusion of clump weights in the system does not consistently improve the overall performance compared to the system without clump weights in shallow water regions with extreme sea state. This study suggests the need for further research to explore the feasibility and potential advantages of using clump weights to optimize mooring systems in shallow water environments. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-09-22T17:46:18Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2023-09-22T17:46:18Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 致謝 I
Abstract II 摘要 III Nomenclature IV Latin Symbol V Greek Symbol VI Content VII List of Figures VIII List of Tables IX Chapter 1 X Introduction XI 1.1 Background 1 1.2 Literature Review 4 1.3 Motivation 7 1.4 Structure of Report 9 Design Criteria 10 2.1 Rules and Regulations 10 2.2 Design Load Case 11 2.3 Design Basis 12 2.4 Simulation Software 13 Numerical Method 14 3.1 Diffraction Analysis 14 3.1.1 First Order Problem 15 3.1.2 Second Order Problem 18 3.2 Dynamic Analysis 21 3.2.1 General 21 3.2.2 Line 22 3.2.3 Clump Weights 24 3.2.4 Hydrodynamic Resistance 25 3.2.4.1 Damping 25 3.2.4.2 Yaw Rate Drag 25 3.3 Environment 27 3.3.1 Wind 27 3.3.2 Wave 29 3.3.3 Current 29 Model Setup 31 4.1 General Settings 31 4.2 Wind Turbine 32 4.3 Semi-submersible Platform 36 4.4 Mooring System 43 4.5 Clump Weight 48 4.6 Environment 50 Control case 52 5.1 Case Settings 52 5.2 6 Degree Motion (6 DoF) 53 5.3 Line Tension 54 5.4 Touchdown Point 60 Parametric Study 63 6.1 Clump Weight Starting Point 63 6.1.1 Case Settings 63 6.1.2 Result and Discussion 65 6.2 Clump Weight Spacing 72 6.2.1 Case Settings 72 6.2.2 Result and Discussion 74 6.3 Number of Clump Weight 83 6.3.1 Case Settings 83 6.3.2 Result and Discussion 84 Conclusion 90 References 91 | - |
| dc.language.iso | en | - |
| dc.title | 加重塊在淺水海域極限環境條件下對2兆瓦浮動式離岸風力發電機繫泊系統的影響 | zh_TW |
| dc.title | Influence of Clump Weight on 2 MW Floating Offshore Wind Turbine Mooring System in Extreme Sea Condition and Shallow Water | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 鍾承憲;楊舜涵 | zh_TW |
| dc.contributor.oralexamcommittee | Cheng-Hsien Chung;Shun-Han Yang | en |
| dc.subject.keyword | 浮動式離岸風力發電機,繫泊系統,加重塊,極端海況,淺水海域, | zh_TW |
| dc.subject.keyword | Floating Offshore Wind Turbines,FOWTS,Mooring System,Clump Weight,Extreme Sea Conditions,Shallow Water, | en |
| dc.relation.page | 95 | - |
| dc.identifier.doi | 10.6342/NTU202303528 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2023-08-09 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 工程科學及海洋工程學系 | - |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
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