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Multi-Excitation fatigue Testing for Large Full-Scale Wind Turbine Blade

Journal of Donghua University(English Edition) 2020年第5期37卷 417-424页

作者： PAN Zujin WU Jianzhong ZHANG Zhenguo School of Mechanical Engineering Tongji UniversityShanghai 200092China Shanghai Electric Wind Power Co. Ltd.Shanghai 200235China

In order to solve the problem of insufficient exciting force of equipment for large full-scale wind turbine blade fatigue testing,the influence of gravity on the performance of excitation equipment and fatigue damage evaluation of the different positions of wind turbine blades are *** the multi-excitation loading in the horizontal direction,the actuator force of the excitation equipment does not need to overcome the gravity of the dynamic mass,which directly outputs the exciting force of the system *** excitation efficiency of the equipment is 77%higher than that of the vertical *** gravity moment of the horizontal loading mode is perpendicular to the loading *** is,the mean load in the flapwise direction is *** weight of excitation equipment could replace the tuning mass on the condition that the self-weight of equipment is reduced by the multi-excitation mode,which helps the excitation equipment play the comprehensive function of excitation equipment and tuning *** the same time,the gravity moment in the edgewise direction will be decreased by 17.0%22.5%under the multi-excitation horizontal loading *** the vertical loading mode,the gravity moment is the mean load,which only increases fatigue damage accumulation by 15.6%.By comparing the role of gravity in the excitation equipment and fatigue damage evaluation,the multi-excitation horizontal loading mode has more advantage to performance the exciting force than the contribution of gravity to the fatigue damage accumulation in the vertical loading *** the fatigue testing of multi-excitation horizontal loading,the potential of excitation equipment is explored,and the problem of insufficient exciting force in large full-scale wind turbine blade fatigue testing will be solved.

关键词： wind turbine blade fatigue testing multi-excitation exciting force equivalent fatigue damage accumulation

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