海上风机单桩基础疲劳影响因素分析

  目的]  为提高评估海上风机单桩基础疲劳寿命准确性，重点探讨了影响海上风机单桩基础疲劳寿命计算的影响因子。  方法]  首先利用简化梁单元模型与局部有限元模型模拟了某工程的单桩基础结构，其次结合波浪谱疲劳方法对单桩基础由波浪载荷造成的疲劳强度进行了评估，最后分别计算并讨论了传递函数、波浪理论和局部开孔的结构形式对风机基础疲劳损伤的影响。  结果]  分析结果表明:传递函数和局部开孔的结构形式对钢管桩结构的疲劳强度影响显著。  结论]  所提计算方法和分析结果是正确并有效的，可为实际应用提供指导。

Analysis of Influencing Factors on Fatigue of Offshore Wind Turbine Monopile Foundation

  Introduction]  The paper aims to discuss the factors which influence the accuracy of monopile foundation evaluation.  Method]  Firstly, beam model and local finite element model were bulit to simulate the monopile foundation structure response. Secondly, the fatigue damage coming from wave was evaluated by spectrum fatigue method. Finally, the factor of the transfer function, wave theory and the penetration which influencing the fatigue life of the monopile foundation was discussed in this paper.  Result]  According to the analysis results, it can be get the conclusion that the transfer function and the type of penetration have significant effect on the fatigue strength of offshore monopile foundation.  Conclusion]  We demonstrate the feasibility of the computing method and analysis results, this work provides some guidance for practical application.