本研究室顧承宇教授榮獲105學年度「傑出教學教師」

恭喜顧承宇教授榮獲國立臺灣海洋大學 105 學年度「傑出教學教師」

本校105 學年度僅一名「傑出教學教師」名額獎項

 

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配點 TREFFTZ 方法 研究新知

On the Accuracy of the Collocation Trefftz Method for Solving Two and Three Dimensional Heat Equations

Cheng-Yu Kua Jing-En Xiaoa Chih-Yu Liua Weichung Yeiha

a Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung, Taiwan

 

ABSTRACT

In this article, the accuracy of the collocation Trefftz method (CTM) for solving two and three dimensional heat equations was investigated. The numerical solutions were approximated by superpositioning T-complete functions formulated using cylindrical harmonics. To avoid the ill-conditioned system of the CTM, the characteristic lengths and the multiple-scale Trefftz method were adopted. The results revealed that for two-dimensional problems, the CTM can provide highly accurate numerical solutions, with the accuracy increasing with the order of the terms. For three-dimensional problems, highly accurate numerical solutions can be obtained using a certain order of terms, where the order is determined by performing an accuracy assessment.

Keywords: Trefftz method; Ill-conditioned; Characteristic length; Cylindrical harmonics; Three dimensional

引用文獻

Cheng-Yu Ku*, Jing-En Xiao, Chih-Yu Liu, Weichung Yeih (2016), “On the Accuracy of the Collocation Trefftz Method for Solving Two and Three Dimensional Heat Equations”, Numerical Heat Transfer, Part B: Fundamentals: An International Journal of Computation and Methodology, Volume 69, Issue 4, pp. 334-350, 2016, http://dx.doi.org/10.1080/10407790.2015.1125215. (IF 1.330, SCIE, 30/58, Q2 in THERMODYNAMICS, JCR 2015)

Full paper link:

https://drive.google.com/open?id=0B6KIiA0ONNL1dnE0Ni0xNnh2NEE

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離岸風機套筒式基樁 研究新知

臺灣地區離岸風機套筒式基樁承載特性分析之研究

摘要

本研究針對臺灣西部海岸離岸風機套筒式基樁承載特性進行分析。由於臺灣地理位置特殊位於環太平洋地震帶,地震活動十分頻繁,因此,離岸風機基礎在地震下之穩定性評估為重要之研究課題。此外,本研究針對海事工程有效應力孔隙水壓激發模式、海事工程土壤與流體耦合分析模式進行研究,以利風機基礎結構分析設計。臺灣西部海域離岸風場工址多屬海床沈積層,土層主要以砂土與黏土層為主,且一般較為鬆軟,因此,本研究提出一套新的離岸風機基礎設計流程,而離岸風機套筒式基樁之靜力與動力承載力分析是重之重點研究課題之一。由分析成果顯示,本研究之基礎設計分析可適切掌握土壤與基礎之互制行為,孔隙水壓激發模式能有效地模擬土壤液化現象,配合風機設計載重能檢核樁基礎承載力是否滿足設計需求,並利用動力分析得知基礎受震後之行為。
關鍵詞 : 動力分析、 孔隙水壓、海床土壤、離岸風場 、套筒式基礎

引用文獻

Cheng-Yu Ku*, Lien-Kwei Chien (2016), “Modeling of Load Bearing Characteristics of Jacket Foundation Pile for Offshore Wind Turbines in Taiwan”, Energies 2016, 9 (8), 625; doi:10.3390/en9080625. (IF 2.077, SCI, 43/88, Q2 in ENERGY & FUELS, JCR 2015)

全文下載

https://drive.google.com/open?id=0B6KIiA0ONNL1LTdaOXQwNEJWa3M

 

Article

Modeling of Load Bearing Characteristics of Jacket Foundation Piles for Offshore Wind Turbines in Taiwan

Cheng-Yu Ku * and Lien-Kwei Chien

Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung 202, Taiwan;

Abstract: This paper presents a pioneering study on numerical modeling of load bearing characteristics of the jacket foundation pile for offshore wind turbines on the west coast of Taiwan. Because Taiwan is located in an earthquake prone area, there is significant interest in improving the prediction of the behavior of wind turbine jacket foundations subjected to seismic loading.  Investigation of the bearing capacity of the jacket foundation pile for the offshore wind farm using effective stress analysis, with consideration of pore pressure generation and soil/liquid coupled analysis, was conducted. A new procedure to evaluate the design of offshore wind turbine foundation piles in the sand and clay inter-layered soil was also proposed. Static and dynamic analyses of bearing capacity of the jacket foundation pile were conducted. Results obtained demonstrate that the design process for the jacket foundation pile proposed in this study can properly reflect the interaction behavior of the foundation and the soil. In addition, the pore pressure generation model can be used to simulate soil liquefaction. The proposed method is also very useful in the evaluation of the design capabilities of offshore wind turbine jacket foundations.

Keywords: dynamic analysis; pore pressure; seabed soils; offshore wind farm; jacket foundation

Cheng-Yu Ku*, Lien-Kwei Chien (2016), “Modeling of Load Bearing Characteristics of Jacket Foundation Pile for Offshore Wind Turbines in Taiwan”, Energies 2016, 9 (8), 625; doi:10.3390/en9080625. (IF 2.077, SCI, 43/88, Q2 in ENERGY & FUELS, JCR 2015)

Full paper download:

https://drive.google.com/open?id=0B6KIiA0ONNL1LTdaOXQwNEJWa3M

2016_J_energies-09-00625

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本研究室獲交通部運輸研究所105年佳作研究獎狀

本研究室獲交通部運輸研究所佳作研究獎狀(105年6月)。

本系參與本計畫人員為: 顧承宇教授 張景鐘教授

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恭喜本研究室通過104年度科技部兩項研究計畫

恭喜本研究室通過104年度一般型研究計畫(個別型)大地工程學門研究計畫 (計畫主持人:顧承宇 教授)

恭喜本研究室通過104年度一般型研究計畫(整合型)永續發展研究學門研究計畫 (計畫主持人:顧承宇 教授)

 

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恭喜本研究室劉芷妤與蕭靖恩同學錄取本校博士班

恭喜本研究室劉芷妤與蕭靖恩同學錄取國立臺灣海洋大學河海工程研究所博士班

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恭喜本研究室余孟勳與張中宇同學通過碩士論文口試

恭喜本研究室余孟勳與張中宇同學通過碩士論文口試

余孟勳論文題目:

動力分析於離岸風機基礎評估之研究

Study on Dynamic Analysis of Offshore Wind Turbine Foundation

張中宇論文題目:

互層土壤壓密問題之研究

Study on Consolidation Problems in Multi-Layered Soil

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本研究室獲交通部運輸研究所佳作研究獎狀

本研究室獲交通部運輸研究所佳作研究獎狀(104年6月)。

本系參與本計畫人員為: 顧承宇教授 張景鐘教授

研究助理: 曾韋緐 陳明鈺 余孟勳

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本研究室獲基隆市政府頒發感謝狀

本研究室顧承宇老師, 博士班 蔡勇賢, 碩士班 黃筱真 協助基隆市政府辦理內政部災害防救深耕計畫, 獲基隆市政府頒發感謝狀(103年2月)。

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黃筱真 蔡勇賢 顧承宇

 

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馬年迎新春 河工系與海大校長相見歡

河工系為感念本校張清風校長 上任一年多來為本校付出之諸多貢獻, 特由黃文政系主任撰詩一首並由書法家胡文龍先生揮毫, 於103年2月18日由河工系各組老師致贈書法一幅.

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