短时风湍流结合长期风况的风电机组齿轮箱非零均值非高斯随机过程的频域疲劳寿命预测研究

项目名称： 短时风湍流结合长期风况的风电机组齿轮箱非零均值非高斯随机过程的频域疲劳寿命预测研究

项目编号： No.51505225

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 邱颖宁

作者单位： 南京理工大学

项目金额： 22万元

中文摘要： 本项目从短期风湍流和长期风速分布特性出发，全面考虑机组本身运行机理考察风电齿轮箱在湍流情况下的动力学响应特性，研究非零均值非高斯随机过程的频域疲劳寿命预测方法。通过建立风速的流体力学模型和齿轮箱的动力学响应模型，针对风速具有非高斯随机过程的分布特点，深入探索频域疲劳寿命预测模型中非高斯分布参数对齿轮箱应力频谱密度函数的影响，研究随机风速外部激励和系统内部激励变化情况下的疲劳损伤机制，发掘齿轮箱结构参数、风电机组控制策略在不同风湍流等级情况下对齿轮疲劳寿命的影响，发展非零均值非高斯随机过程频域疲劳寿命预测理论；针对当前寿命预测方法验证的难点，提出采用SCADA数据进行疲劳寿命方法的测试和论证，并在此基础上进行实时齿轮箱寿命预测的探索，一方面突破论证方法的难点，另一方面探索利用低频信号实现在线齿轮寿命预估的新方法，为未来大型风电机组低成本的远程监控并实现预防性维护提供必要的工具和理论基础。

中文关键词： 风电机组；；齿轮箱；；寿命预测；；疲劳损伤

英文摘要： This project studies short term wind turbulence and long term wind speed impacts to gearbox dynamic response of wind turbines with different control strategy. It aims at developing fatigue assessment method for non-zero non-Gaussian process. By building up fluid dynamic model for wind speed and constructing dynamic response model for wind turbine gearbox, impacts of parameters in non-Gaussian process of fatigue assessment to gearbox stress spectral density are analyzed. The external excitation by wind speed and internal excitation within wind turbine system effects to fatigue damage are studied. Influences of gearbox structural parameters, control strategies under different wind turbulences scales to gearbox fatigue life are quantified. A new method of frequency-domain fatigue assessment method is developed for non-zero non Gaussian process. SCADA data is also proposed as a new testing source to prove the fatigue assessment method, based on which on-line fatigue damage monitor system is further explored. The research is meaningful to improve wind turbine reliability and practically push the theory of wind turbine gearbox fatigue assessment. The result provides useful theory and tools for future prognostic maintenance.

英文关键词： wind turbine ;gearbox;life prediction;fatigue damage