兆瓦级风力机叶片新型两点疲劳加载试验系统振动耦合机理及解耦研究

项目名称： 兆瓦级风力机叶片新型两点疲劳加载试验系统振动耦合机理及解耦研究

项目编号： No.51305243

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 黄雪梅

作者单位： 山东理工大学

项目金额： 25万元

中文摘要： 针对目前兆瓦级风力机叶片单点疲劳加载试验方法测试结果误差较大，从而造成疲劳测试失真的问题，提出新型两点疲劳加载测试方法。由于两点疲劳加载系统中两个加载源与风力机叶片之间构成了一个非常复杂的非线性能量传递系统，因此其耦合效应会严重影响目标弯矩的分布精度以及最终的疲劳测试结果。为进一步提高疲劳测试精度，本项目将研究基于叶片柔性连接的两个加载源振动的空间耦合机理、其它加载源影响下的单加载源与叶片的振动自同步机理，通过分别建立其相应的振动耦合数学模型和仿真模型，揭示各个参数对上述耦合过程的作用规律。然后搭建非控制作用下的两点疲劳加载装备，通过现场试验验证数学模型与仿真模型的准确性。在此基础上，最后提出该非线性耦合系统的智能解耦方法，从而形成完善的两点疲劳加载试验系统的振动耦合理论体系。本项目研究成果将有望极大提高兆瓦级风力机叶片的疲劳性能测试精度，同时为叶片的优化设计提供详实的试验数据。

中文关键词： 风力机叶片；疲劳加载实验；耦合效应；自同步；解耦

英文摘要： In fatigue loading test for MW wind turbine blade, the method of single-point loading has the problem of much error and distortion of the testing result. A new dual-point fatigue loading mode is put forward to improve the testing accuracy in this project. However, the two frequency conversion motors and the wind turbine blade construct a complicated non-liner energy transferring system where the coupling effect will influence the distribution of target flexural moment seriously and then testing result. So firstly the space coupling mechanisms of two loadings connected by flexible wind blade and the coupling mechanisms of one loading with blade influenced by another loading will be researched. By building their mathematical and simulation model of coupling, the effect rules of parameters will be found. Then the two models mentioned above will be tested by the developed dual-point fatigue loading equipment in non-control situation. Finally an intelligent decoupling algorithm for the non-liner coupling system mentioned above will be presented to form an integrated theory of vibration coupling for dual-point fatigue loading system. The research findings are expected to improve the accuracy of fatigue loading test of MW wind turbine blade greatly and to supply the detailed data for wind turbine blade designing.

英文关键词： wind turbine blade；fatigue loading test；coupling effect；self-synchronization；decoupling algorithm