台灣西部沿海地區因颱風及地震等因素，相對於國外離岸風機環境，面臨問題更為複雜，風機基座設計在承受極端環境是否安全、風場選擇是否合適，為台灣開發離岸風機發電為重要課題。本研究以LPile模擬，以台灣彰化縣芳苑區外海規劃離岸風場三個場址(風機一號、風機二號、海象觀測塔)之土層狀況，先以在原始土層中，比較單一與不同樁壁厚度，再分析地表下20 m內黏土層厚度變化，找出彎矩、位移、旋轉角之最大值與原始土層相比，誤差穩定或最小誤差之黏土層厚度，與原始土層之彎矩、位移、 旋轉角結果相比，進行離岸風機樁基礎之土層靈敏度分析。
經分析顯示，三個場址於原始土層之彎矩結果，在地表下10 m內即產生最大彎矩，且於地表下20 m時彎矩即趨近於零；簡化土層分析中，風機一號及海象觀測塔簡化結果，彎矩、位移及旋轉角產生誤差值，但在黏土層厚度遞減至特定值後，誤差趨於穩定，風機二號簡化結果，彎矩誤差結果非常不規則，只能求出最小誤差，而位移、旋轉角誤差隨黏土層厚度變化會先下降而上升，在最小誤差之位移、旋轉角結果與原始土層相似。

Comparing to the offshore wind-farm environment in Europe and America, wind-farm at western costal area of Taiwan faces more complicated challenges, including typhoon and earthquake. The safety of turbine under extreme environment, and the suitability of the selection of wind-farm, are the two most important issues regarding the design of turbine foundation. Single-pile simulation software LPile was used in this study to analyze soil layers beneath the three turbines (turbine #1, turbine #2, and seascape observation tower) at the offshore of Fang-Yuan district, Changhua, Taiwan. The differences between identical wall thickness and different wall thickness was compared, and a simplified soil layer analysis was established using the thickness of clay layer 20m under surface. Moment, displacement, and angle of rotation were determined and compared with the original soil layer. The thickness with stable, or minimum, error percentage was then compared to the moment, displacement, and angle of rotation along the depth to determine the relationship between the two.

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