【摘要】：論文通過我國與歐洲海上風電發展過程比較,認為除了風、浪、流等常規荷載外,我國海上風電工程還要著重考慮臺風、地震等極端災害的威脅。因此,對海上風機平臺進行全壽命階段極端災害下的可靠性分析研究具有重要意義。本論文結合海上風電工程實例,考慮復雜環境因素,研究與評估了海上風機全壽命階段在臺風和地震作用下的可靠度情況,為我國近海風電場的風機結構設計提供了理論指導。 論文首先介紹了海上風機的主要基礎型式和國內外海上風電項目的發展歷程與前景規劃,以及國內外海上風機可靠度分析領域的研究概況。根據可靠度理論及結構可靠度求解方法,針對海上風機可靠性分析特點,在不確定性有限元分析的基礎上,以響應面法為核心,結合蒙特卡洛法求解海上風機的可靠度指標,并給出了分析流程圖。經不同模型對比,選取p-y曲線法來模擬樁-土非線性作用,并根據海洋平臺的腐蝕規律和沖刷規律,確定海上風機四個典型壽命階段的參數,考慮抗力參數不確定性,建立海上風機全壽命階段的有限元隨機模型。 對臺風和地震等環境荷載進行不確定性分析。將臺風荷載和地震荷載等效為隨機靜力模型,以DNV規范為基礎,考慮不同的極限狀態函數,分別計算了結構在臺風作用和地震作用下無法正常工作的失效概率和可靠度指標,并總結典型壽命階段海上風機在極端災害下的可靠指標變化規律。通過對隨機變量進行靈敏度分析,獲得對可靠指標影響較大的隨機變量。論文的研究對平臺的設計提供了可靠度校核方面的支持,并且對在役平臺極端災害下的安全性檢測及評估提供了技術參考。
[Abstract]:By comparing the development process of offshore wind power in China with that in Europe, it is concluded that in addition to conventional loads such as wind, waves and currents, the threat of extreme disasters such as typhoons and earthquakes should be taken into account in offshore wind power engineering in China. Therefore, it is of great significance to analyze and study the reliability of offshore fan platform under extreme disasters in the whole life stage. In this paper, the reliability of offshore wind turbines under the action of typhoon and earthquake is studied and evaluated considering complex environmental factors, which provides theoretical guidance for wind turbine structure design in offshore wind farms in China. Firstly, the paper introduces the main basic types of offshore fan, the development history and prospect planning of offshore wind power project at home and abroad, and the research situation of reliability analysis field of offshore fan at home and abroad. According to the reliability theory and structural reliability calculation method, according to the characteristics of reliability analysis of offshore fan, based on the finite element analysis of uncertainty, the reliability index of offshore fan is solved by combining Monte Carlo method with response surface method as the core. The flow chart of analysis is given. Based on the comparison of different models, the p-y curve method is selected to simulate the pile-soil nonlinear effect. According to the corrosion law and erosion law of offshore platform, the parameters of four typical life stages of offshore fan are determined, and the uncertainty of resistance parameters is considered. The finite element stochastic model of the whole life stage of offshore fan is established. Uncertainty analysis of environmental loads such as typhoons and earthquakes is carried out. The wind load and seismic load are equivalent to stochastic static model. Based on the DNV code and considering different limit state functions, the failure probability and reliability index of the structure which can not work normally under typhoon and earthquake are calculated respectively. The variation law of reliability index of offshore fan in typical life stage under extreme disaster is summarized. By analyzing the sensitivity of the random variables, the random variables which have great influence on the reliability index are obtained. The research in this paper provides support for reliability verification of platform design, and provides a technical reference for the safety detection and evaluation of platforms in service under extreme disasters.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614

【參考文獻】

相關期刊論文 前10條

1 胡穎;;2010年我國風電產業發展回顧與展望[J];船舶物資與市場;2011年01期

2 歐進萍,段宇博;高層建筑結構的抗震可靠度分析與優化設計[J];地震工程與工程振動;1995年01期

3 侯保榮;;鋼鐵設施在海洋浪花飛濺區的腐蝕行為及其新型包覆防護技術[J];腐蝕與防護;2007年04期

4 王衛遠;楊娟;李睿元;;海上風電場風機樁基局部沖刷計算[J];中國港灣建設;2011年06期

5 孫寧松,孫永福,宋玉鵬;海洋平臺樁基沖刷及影響因素分析[J];海岸工程;2004年04期

6 孫永福;宋玉鵬;孫惠鳳;馬江;;潮流作用下海洋平臺樁基沖刷過程及沖刷深度計算[J];海洋科學進展;2007年02期

7 歐進萍，段宇博，，劉會儀;結構隨機地震作用及其統計參數[J];哈爾濱建筑工程學院學報;1994年05期

8 周艷榮;張巍;宋強;;國內外海上風電發展現狀及海域使用中的有關問題分析[J];海洋開發與管理;2011年07期

9 朱位秋,任永堅;隨機場的局部平均與隨機有限元[J];航空學報;1986年06期

10 李靜;陳健云;;海上風力發電結構動力研究進展[J];海洋工程;2009年02期

相關博士學位論文 前2條

1 韓曉雙;導管架海洋平臺地震響應研究[D];大連理工大學;2008年

2 李玉剛;樁式海上風機基礎可靠度分析及優化方法研究[D];大連理工大學;2009年

本文編號：2300843