Study of the Ocean Wave Impacts on Vertical Cylinders in the Directional Irregular Wave Field (II)

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基本資料

Project title

Code/計畫編號

MOST107-2221-E019-015

Translated Name/計畫中文名

圓柱直立結構物於海洋波浪方向不規則波場下受力之研究 (II)

Project Coordinator/計畫主持人

Chi-Yu Li

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Institute of Marine Environment and Ecology

Website

https://www.grb.gov.tw/search/planDetail?id=12676051

Year

2018

Start date/計畫起

01-08-2018

Expected Completion/計畫迄

31-07-2019

Co-Investigator(s)

Wen-Kai Weng

Bugetid/研究經費

647千元

ResearchField/研究領域

土木水利工程

本研究主要擬探討圓柱直立結構物於海洋開放環境下，其受到各方向波浪衝擊時之受力及其空間、時間分佈等基本特性。再生能源開發為目前我國能源政策之方向，而離岸風電的開發更為目前再生能源的主力之一。然而，離岸風機建置成功因素之一在於其基樁的穩定性。風機基樁受到不同自然環境因子來影響其穩定性，如風吹、波浪打擊、潮流拖曳、底床淘刷等。因此，確保風機基樁的穩定為一重要課題。另外，前人相關研究主要探討單方向波場下海中結構物之受力情形，其並無法完全描述開放海域下的空間變化。本研究延續去年度計畫，主要探討圓柱直立結構物，如單樁（monopile），於方向波場下，其受力之空間變化等基本特性。去年度計畫內容主要以平面水槽水工模型試驗為主，量測不同波浪條件下，圓柱結構物之相對應包含受力、波壓及波場等物理量。本研究主要為建立以邊界元素法（BEM, Boundary Element Method）之數值模式，求解該問題並與實驗結果相互比較驗證。本研究之成果期待能提供未來相關工程設計施工，如風機基樁之設置等，相較於斷面水槽之二維結果，提供建設性的參考資訊。A numerical study of the ocean wave impacts on vertical cylinders in the directional irregular wave field is proposed here. The development of renewable energy is the current direction of our energy policy, and offshore wind energy is one of the main resources. However, the stability of piles determines the success of the installation and they are subjected to different natural loads, such as winds, waves, currents, and scouring, etc. Also, previous studies mainly focused on the wave impacts in the unidirectional wave field. Hence, among many factors, the study focuses mainly on wave impacts and their temporal and spatial distributions on the vertical cylinder structure, such as monopile, in the directional wave field. This study is the extension of the project last year. The main focus last year was on the hydraulic model test, and different physical variables, including force, pressure, wave fields, etc., were measured for different wave conditions. This year, a numerical model based on the Boundary Element Method (BEM) is to be developed to simulate the phenomena of different wave conditions, and the results will be compared with the measured values last year. The final results of this study are in the hope to provide constructive suggestions for the engineering design and construction of, for example, wind turbine foundations, in the future.

Keyword(s)

波力
方向波場
柱狀結構物
不規則波
wave impacts
directional wave field
cylinder structures
irregular waves

DSpace CRIS

Study of the Ocean Wave Impacts on Vertical Cylinders in the Directional Irregular Wave Field (II)

基本資料

Description