Research Modal Analysis Method of MW Wind Turbines

Abstract:

In order to explore the modal characteristics of the wind turbine, this paper researches how these natural frequencies of the major structural components within the operation speed range to avoid coupled resonance phenomenon. Aiming at 1500kW variable speed variable pitch double-fed wind turbines which are the mature products in market, the whole wind turbine dynamic modal equations are established by Lagrange method, and then process on-site testing is carried out to obtain measured modal characteristic parameters. The results of both theoretical and measured dates show that deviation between theoretical data and measured data, how the subsystem boundary conditions simplified methods to influence the rotor system natural frequencies, how the subsystem boundary conditions simplified methods to change the cross point of the rotor system natural frequencies with rotor speed 3P, and solution for wind turbine pass the cross point. The results will provide a certain extent guidance for the wind turbine development, design and optimization.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 1524-1530
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.1524
• Online since: September 2013
• Authors: Yong Shui Luo, Min Qiang Zhou, Wei Jiang Liu, Qi Chen, Shou Bin Wang
• Keywords: Dynamical Model, Modal Analysis, Natural Frequency, Optimization Wind Power

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