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| 題 名 | 建置拖航水槽不規則波浪生成系統=Modification for Irregular Wave Generation System in NTU Towing Tank |
|---|---|
| 作 者 | 李福恩; 薛皓丞; 林宗岳; | 書刊名 | 中國造船暨輪機工程學刊 |
| 卷 期 | 44:2 2025.05[民114.05] |
| 頁 次 | 頁41-47 |
| 分類號 | 444.16 |
| 關鍵詞 | 斜板式造波板; 回授控制; 不規則波浪; 規則波; Flap-type wave maker; Feedback control; Irregular waves; Regular waves; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 臺大拖航水槽建成至今將滿四十週年,配有線性波浪造波器,該系統使用液壓控制斜板式機構進行規律的往復 式運動。面對當今船舶和浮式風機於真實海況的試驗需求,提升造波機在拖曳水槽中的實用性,本研究從規則波的 基礎架構發展至不規則波的應用領域,即以數個規則波疊加形成指定波譜時域訊號。然而不同的規則波的頻率在造 波時與規則訊號之間為非線性關係,無法直接在訊號端疊加。故本研究以回授控制規則波生成,測量水槽內不同位 置的波高以及造波板頂面的行程,並據此計算造波板的機械能轉換效率。接著透過與勢流理論中的理論值進行比 較,從而建立造波板行程跟波高之間的關聯性。基於這套機制,未來即可根據試驗所需條件,選擇適當的造波板行 程幅度與頻率,並調整水槽水深,從而實現理想的試驗環境配置。此外,此機制亦能適配於模擬波譜條件,為更精 準的耐波性試驗提供支持。 |
| 英文摘要 | The towing tank at National Taiwan University is approaching its 40th anniversary and is equipped with a linear wave generator. This system employs a hydraulically controlled inclined-plate mechanism to perform regular reciprocat- ing motions. Given the increasing demand for experimental testing of ships and floating wind turbines under real sea conditions, enhancing the practicality of the wave generator in the towing tank is es sential. This study develops the ap- plication of irregular waves based on the fundamental framework of regular waves by superimposing multiple regular waves to generate a specified wave spectrum in the time domain. However, the frequencies of different regu lar waves exhibit a nonlinear relationship with the generated signals, making direct superposition at the signal end unfeasible. To address this, the study employs feedback control for regular wave generation, measuring wave heights at various locations within the tank and tracking the stroke of the wave-making plate. These measurements are then used to calculate the mechanical energy conversion efficiency of the wave-making plate. By comparing these results with theoretical values from potential flow theory, the study establishes the relationship between the stroke of the wave -making plate and wave height. Based on this mechanism, future experiments can select appropriate stroke amplitudes and frequencies for the wave-making plate, as well as adjust the water depth in the tank, to achieve the desired experimental conditions. Moreover, this approach can also be adapted to simulate specific wave spectrum conditions, thereby supporting more precise sea- keeping tests. |
本系統中英文摘要資訊取自各篇刊載內容。