海上风机单桩基础沉桩可打性及疲劳损伤分析  

Drivability and Fatigue Damage Analysis of Offshore Wind Turbine Monopile

作　　者：熊根 尚进 和庆冬 李炜 XIONG Gen;SHANG Jin;HE Qingdong;LI Wei(Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province,Hangzhou 311122,Zhejiang,China;PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang,China;State Power Investment Group Jiangsu Offshore Wind Power Co.,Ltd.,Yancheng 224000,Jiangsu,China)

机构地区：[1]浙江省深远海风电技术研究重点实验室,浙江杭州311122 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]国家电投集团江苏海上风力发电有限公司,江苏盐城224000

出　　处：《水力发电》2020年第11期104-110,共7页Water Power

基　　金：国家自然科学基金面上项目(51579227);国家自然科学基金青年科学基金项目(41206075)。

摘　　要：大直径单桩基础已被广泛应用于海上风电场项目中,由于海洋工程地质的复杂性,大直径钢管桩的可打入性以及由打桩所引起的疲劳损伤日益受到重视。依托某海上风电场大直径单桩基础沉桩工程,基于现场沉桩数据,通过反分析方法确定单桩基础打入性分析的主要参数,借助GRLWEAP软件建立动力沉桩计算模型,并获得打桩过程中的实际土阻力。同时,采用基于Miner线性损伤理论的S-N曲线,研究了打桩过程中桩身截面的累计疲劳损伤。研究结果表明,基于反分析法所得的实际土阻力与API规范法所得结果趋势基本一致,其最大疲劳损伤主要出现在单桩基础顶部圆锥过渡段以及变壁厚段。The monopile foundation has been widely used in offshore wind turbine projects.Due to the complexity of marine engineering geology,the drivability and the fatigue damage caused by impact force are receiving increasing attention.Relying on practical engineering,the main parameters of the monopile penetration analysis are determined by back analysis method based on existing piled data,and the dynamic installation pile numerical model is established by using GRELWEAP.The actual soil resistance can be obtained by the back analysis.At the same time,the cumulative fatigue damage of the monopile section during the driving process is studied by using the S-N curve based on Miner linear damage theory.The results show that the actual soil resistance obtained by the back analysis method is basically consistent with the results obtained by the API standard method,and the maximum fatigue damage mainly occurs in the conical transition section and the variable wall thickness section of the monopile.

关 键 词：风机 单桩基础 可打入分析 疲劳损伤 反分析 

分 类 号：P752[天文地球—海洋科学] TM315[电气工程—电机]