上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (04): 565-569.

• 海洋工程 • 上一篇    下一篇

近海风电机组单桩式支撑结构疲劳分析

莫继华, 何炎平, 李勇刚, 张二虎   

  1. （上海交通大学 海洋工程国家重点实验室， 上海 200240）
  • 收稿日期:2010-06-27 出版日期:2011-04-29 发布日期:2011-04-29
  • 基金资助:

    海洋工程国家重点实验室自主研究课题资助（GKZD010034）

Fatigue Analysis of Offshore Wind Turbine Mono-pile Support Structure

 MO  Ji-Hua, HE  Yan-Ping, LI  Yong-Gang, ZHANG  Er-Hu   

  1. （State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200240, China）
  • Received:2010-06-27 Online:2011-04-29 Published:2011-04-29

摘要： 用WAsP分析风场数据得到风速的分布情况，统计各工况的风、浪、流等环境参数.基于支撑结构所受的疲劳载荷，用ABAQUS对结构建模并通过振型叠加法求出应力响应的时间历程.根据S-N曲线、雨流计数法以及线性累积损伤理论，用Fe-safe计算出支撑结构的疲劳寿命并分析各种载荷对结构疲劳寿命的影响.结果表明：支撑结构的疲劳寿命满足要求；风机载荷是结构疲劳的主要影响因素，合理的发电机控制策略有助于提高结构的疲劳寿命.以风向和10 min平均风速为依据划分工况的方法可为海上风力发电结构的疲劳分析提供参考.

关键词: 近海风电机组, 动力响应, S-N曲线, 疲劳

Abstract: WAsP was used to analyze the data of a wind farm and the wind speed distribution was gained. The parameters of wind, wave and current for each working condition were calculated. On the basis of fatigue loads, ABAQUS was used to model the support structure and the stress response time history was figured out through mode superposition method. According to S-N curves, rainflow counting method and Miner’s linear damage theory, Fe-safe was used to work out the fatigue life of the support structure and the effect of different kinds of loads on fatigue life was also researched. The results show that the fatigue life of the support structure meets demand. Wind turbine loads are the key influence factor of fatigue life. Sensible generator control strategy is good for increasing fatigue life. The method that defining working condition through wind direction and 10 minute mean wind speed can be used in fatigue analysis of offshore wind turbine support structure.

Key words: offshore wind turbine, dynamic response, S-N curves, fatigue

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