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.