套管式風力發電機塔柱結構易損性分析;Fragility Analysis of a Jacket type Wind Turbine

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Title:	套管式風力發電機塔柱結構易損性分析;Fragility Analysis of a Jacket type Wind Turbine
Authors:	謝秉諺;Hsieh, Ping-Yen
Contributors:	土木工程學系
Keywords:	離岸風力發電機;地震風險分析;易損性曲線;非線性動力分析;Offshore wind turbine;Seismic risk analysis;Fragility curve;Nonlinear dynamic analysis
Date:	2023-07-18
Issue Date:	2024-09-19 14:13:02 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究旨在探討離岸風力發電機在地震激震下的風險評估，以提供相關單位在設計、建造和營運離岸風力發電機時的參考依據。台灣位於環太平洋地震帶，地震頻繁發生，因此對於台灣的地震風險進行研究和評估具有重要意義。文章中也記錄了模型建置的過程，從零件、材料、組裝到離散化網格分割。本論文針對了離岸風機結構進行了綜合性的地震風險研究，包含地震資料的蒐集、結構模態分析、靜力側推分析、損害評估方法等。整理了多個地震事件的地震資料，計算其加速度反應譜，並選擇具代表性的地震事件作為分析模型的外力輸入。透過結構模態分析，計算出了離岸風機結構模型的自然頻率和模態型式，以助於後續瞭解其動態特性。接著進行了損害評估，獲得了離岸風機在受地震荷載下的位移、應力、應變等參數，以評估離岸風機在地震情境下可能會出現的損害程度。研究結果顯示，透過建立易損性曲線，能夠評估離岸風機在不同地震強度下的損害機率。研究結果將會為離岸風力發電機的設計和建造提供重要參考，以確保其在地震情境下的安全運行。此外，這項研究也有助於業界和政策制定者更容易了解風力發電機在地震風險下的表現，並制定相應的安全規範和標準。;This study aims to explore the risk assessment of offshore wind turbines under seismic excitations, providing reference guidelines for relevant entities in the design,construction, and operation of offshore wind turbines. Taiwan is located in the Pacific Ring of Fire, prone to frequent seismic activities, making the study and assessment of earthquake risks in Taiwan highly significant. The article also documents the process of model development, including component selection, material properties, assembly, and discretization of the computational grid. This paper presents a comprehensive seismic risk study of offshore wind turbine structures, including data collection, structural modal analysis, static pushover analysis, and damage assessment methods. The author gathered seismic data from multiple earthquake events and calculated their acceleration response spectra. Representative seismic events were selected as input forces for the analysis model. Through structural modal analysis, the natural frequencies and mode shapes of the offshore wind turbine structure model were computed to better understand its dynamic characteristics. Subsequently, damage assessment was conducted to obtain displacement, stress, and strain parameters of the offshore wind turbine under seismic loading, evaluating the potential damage levels in seismic scenarios. The research findings demonstrate that by establishing fragility curves, one can assess the probability of damage for offshore wind turbines under different seismic intensities. The research findings will provide valuable insights for the design and construction of offshore wind turbines to ensure their safe operation under seismic conditions.Additionally, this study contributes to better understanding the performance of wind turbines under seismic risk for industry professionals and policymakers, enabling the development of appropriate safety regulations and standards.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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