ABSTRACT

In this article the loads and dynamic responses of an offshore wind turbine (OWT) operating in a nonlinear multidirectional mixed sea have been rigorously investigated. It has been demonstrated that nonlinearly simulated realistic waves with bottom effects should be utilised as inputs in the stochastic time domain simulation in order to design an un-conservative support structure for the offshore wind turbine. In order to further improve the simulation efficiency, a novel transformed linear simulation method based on a Hermite transformation model has been first proposed in this article for generating equivalent waves as those obtained from the nonlinear simulation method. The predicted results of the loads and dynamic responses of the offshore wind turbine have been rigorously analysed and systematically compared, and the advantages of using our proposed novel method have been convincingly substantiated.

摘要

在本文中，已经严格研究了在非线性多向混合海中运行的海上风力涡轮机（OWT）的负载和动态响应。已经证明，在随机时域仿真中，应利用具有底部影响的非线性仿真现实波作为输入，以设计用于海上风力涡轮机的非保守支撑结构。为了进一步提高仿真效率，本文首先提出了一种新的基于Hermite变换模型的变换线性仿真方法，用于生成等效于非线性仿真方法的等效波。严谨地分析和系统地比较了海上风力发电机的负荷和动态响应的预测结果，