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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蔡進發(Jing-Fa Tsia) | |
| dc.contributor.author | Peng-Hsiu Ma | en |
| dc.contributor.author | 馬鵬修 | zh_TW |
| dc.date.accessioned | 2023-03-19T22:48:52Z | - |
| dc.date.copyright | 2022-09-30 | |
| dc.date.issued | 2022 | |
| dc.date.submitted | 2022-09-27 | |
| dc.identifier.citation | [1]Oriol R. Rijken and John M. Niedzwecki（2012）,'A Knowledge Base Approach to the Design of Tension Leg Platforms,' Offshore Technology Research Center Texas A&M University. [2]Christiansen, S., Knudsen, T., & Bak, T. （2011）,'Optimal control of a ballast-stabilized floating wind turbine. In 2011 IEEE international symposium on computer-aided control system design （CACSD） （pp. 1214-1219）,' IEEE. [3]Galvan, J., Sánchez-Lara, M. J., Mendikoa, I., Pérez-Morán, G., Nava, V., & Rodríguez-Arias, R. （2018）,' NAUTILUS-DTU10 MW Floating Offshore Wind Turbine at Gulf of Maine： Public numerical models of an actively ballasted semisubmersible. In Journal of Physics： Conference Series （Vol. 1102, No. 1, p. 012015）,' IOP Publishing. Javier Moreno, Krish P. Thiagarajan_, Matthew Cameron, Raul Urbina. ' Added mass and damping of a column with heave plate oscillating in waves,' Department of Mechanical Engineering, University of Maine, Orono, ME 04469, USA, 2016 [4]Tao, L., Lim, K. Y., & Thiagarajan, K. （2004）,' Heave response of classic spar with variable geometry,' J. Offshore Mech. Arct. Eng., 126（1）, 90-95. [5]Tao, L., Molin, B., Scolan, Y. M., & Thiagarajan, K. （2007）,'Spacing effects on hydrodynamics of heave plates on offshore structures,' Journal of Fluids and structures, 23（8）, 1119-1136. [6]Subbulakshmi, A., Jose, J., Sundaravadivelu, R., & Selvam, R. P. （2015）,'Effect of viscous damping on hydrodynamic response of spar with heave plate,' Aquatic Procedia, 4, 508-515. [7]Moreno, J., Thiagarajan, K. P., Cameron, M., & Urbina, R. （2016）,' Added mass and damping of a column with heave plate oscillating in waves. In Proceedings of the 31th International Workshop on Water Waves and Floating Bodies,' Plymouth, Michigan, USA. [8]Moreno, J., Thiagarajan, K. P., Cameron, M., & Urbina, R. （2016）,' Added mass and damping of a column with heave plate oscillating in waves. In Proceedings of the 31th International Workshop on Water Waves and Floating Bodies,' Plymouth, Michigan, USA. [9]Sudhakar, S., & Nallayarasu, S.（2011）,'Influence of heave plate on hydrodynamic response of spar,' In International Conference on Offshore Mechanics and Arctic Engineering （Vol. 44335, pp. 437-447）. [10]Zhu, L., & Lim, H. （2016）,' Experimental Study on the Suppression of a Vertical Circular Cylinder with a Heave Plate,'신재생에너지, 12（S1）, 2-9. [11]Yue, M., Liu, Q., Li, C., Ding, Q., Cheng, S., & Zhu, H. （2020）,' Effects of heave plate on dynamic response of floating wind turbine Spar platform under the coupling effect of wind and wave,' Ocean Engineering, 201, 107103. [12]Journée, J. M. J., & Massie, W. W. （2001）,' Offshore hydromechanics,' Delft University of Technology. [13]Procedures, I. R. （2002）,' Testing and extrapolation methods： Loads and responses, seakeeping. Seakeeping experiments, 7-5.' ITTC. [14]Xiong, L., Lu, W., Li, X., & Guo, X. （2020）,' Estimation of damping induced by taut mooring lines,' International Journal of Naval Architecture and Ocean Engineering, 12, 810-818. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/85185 | - |
| dc.description.abstract | 本研究採用圓柱單管搭配不同的減搖裝置進行自由衰減實驗及不同波浪條件下的耐海性能實驗，減搖裝置包含不同直徑的擴盤及不同直徑與長度的擴管。自由衰減實驗結果找出自然頻率，再計算出各不同組合的附加質量、附加轉動慣性矩及阻尼比。再進行波浪中的耐海性能實驗，由量測結果計算起伏、俯仰及縱移運動的反應振幅運算子。 自由衰減實驗結果顯示擴盤及擴管會降低自然頻率、增加附加質量、增加附加轉動慣性矩及增加阻尼比。擴盤及擴管的起伏附加質量在直徑比1.6時為圓柱單管起伏附加質量的4倍及4.5倍，直徑比1.4擴管之起伏附加質量在長度30公分及10公分時相差14％，擴管俯仰附加轉動慣性矩在直徑比1.6時為圓柱單管的1.28倍。 耐海性能實驗結果顯示安裝擴盤及擴管後可以有效降低其起伏及俯仰反應振幅運算子，且直徑越大效果越顯著，對於起伏之效果優於俯仰。直徑比1.6之擴盤可將起伏反應振幅運算子降低57%及俯仰反應振幅運算子降低52%，直徑比1.6之擴管可將起伏反應振幅運算子降低46%及俯仰反應振幅運算子降低57%，就擴管長度而言長度30公分對比10公分之擴管可將起伏反應振幅運算子降低18%及俯仰反應振幅運算子降低14%。 | zh_TW |
| dc.description.abstract | In this study, the free decay test and the seakeeping test with different wave conditions were conducted by using a circular cylinder with different decay devices. The decay devices consist of different diameters of heave plates, different diameters and different lengths of enlarged cylinders. The natural frequency, added mass, added moment inertia and damping ratio can be obtained from the free decay test. The response amplitude operators of heave, pitch, and surge can be calculated from the seakeeping test with different wave conditions. The test results of the free decay tests show that the heave plates and enlarged cylinders can reduce the natural frequency of heave and pitch. The heave plates and enlarged cylinders can increase the added mass, the added moment inertia and the damping ratio of heave and pitch. The heave added mass of the heave plate of 1.6 diameter ratio is 4 times more than the heave added mass of the circular cylinder. The heave added mass of the enlarged cylinder of 1.6 diameter ratio is 4.5 times more than the added mass of the circular cylinder. The difference of the heave added mass of the enlarged cylinder of 1.4 diameter ratio between the length of 30 cm and 10 cm is 14%. The added moment inertia of the enlarged cylinder of 1.6 diameter ratio is 1.28 times more than the added moment inertia of circular cylinder. The test results of the seakeeping test show that the heave plate and enlarged cylinder can effectively reduce the response amplitude operator （RAO） of heave and pitch. The larger diameter ratio is more effective, and the reduction of heave RAO is better than pitch RAO. The heave plate of 1.6 diameter ratio can reduce 57% of the heave RAO and reduce 52% of the pitch RAO. The enlarged cylinder of 1.6 diameter ratio can reduce 46% of the heave RAO and 57% of the pitch RAO. The enlarged cylinder of 30cm length can reduce 18% of the heave RAO and 14% of the pitch RAO of the enlarged cylinder of 10cm length. | en |
| dc.description.provenance | Made available in DSpace on 2023-03-19T22:48:52Z (GMT). No. of bitstreams: 1 U0001-2609202213572100.pdf: 2390355 bytes, checksum: fc290ee6704651d2e583c4c2a0fbbcc6 (MD5) Previous issue date: 2022 | en |
| dc.description.tableofcontents | 目錄 摘要 i Abstract ii 圖說明 v 表說明 viii 符號說明 ix 第一章 緒論 1 1.1 研究動機及背景 1 1.2 文獻回顧 1 1.3 研究目的與方法 3 1.4 論文架構 4 第二章 運動方程式與分析方法 5 2.1 運動座標系統定義 5 2.2 運動方程式 5 2.2.1 起伏運動方程式 5 2.2.2 俯仰運動方程式 6 2.2.3 縱移運動方程式 6 2.3 自由衰減運動分析 6 2.4 反應振幅運算子分析 11 第三章 模型與量測系統 12 3.1 模型設計及製作 12 3.2 實驗架構與量測儀器 13 3.2.1. 實驗水槽 13 3.2.2. 實驗項目與條件 13 3.3 實驗儀器校正 13 3.4 量測架構與程序 14 3.4.1 起伏自然衰減實驗量測架構及程序說明 14 3.4.2 俯仰自然衰減實驗量測架構及程序說明 15 3.4.3 耐海性能實驗量測架構及程序說明 16 第四章 實驗結果與討論 17 4.1 實驗結果 17 4.1.1. 起伏自由衰減分析結果與討論 17 4.1.2. 俯仰自由衰減分析結果與討論 17 4.1.3. 反應震幅運算子分析結果與討論 18 第五章 結論與建議 20 5.1 結論 20 5.2 建議 21 參考文獻 22 附圖 24 附表 61 | |
| dc.language.iso | zh-TW | |
| dc.title | 圓柱單管搭配減搖裝置耐海性能實驗之研究 | zh_TW |
| dc.title | Experimental Study on the Seakeeping Performance of a Cylinder with Damping Devices | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 110-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 林宗岳(Tsung-Yueh Lin),林恆山(Heng-Shan Lin) | |
| dc.subject.keyword | 耐海性能,擴盤,擴管,自然頻率,附加質量,附加轉動慣性矩,阻尼比,反應振幅運算子, | zh_TW |
| dc.subject.keyword | Seakeeping Performance,Heave Plate,Enlarged Cylinder,Natural Frequency,Added Mass,Added Moment Inertia,Damping Ratio,Response Amplitude Operator（RAO）, | en |
| dc.relation.page | 77 | |
| dc.identifier.doi | 10.6342/NTU202204088 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2022-09-28 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
| dc.date.embargo-lift | 2022-09-30 | - |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
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