Abstract
In the previous research, shaft torsional flexibility was only considered in the wind turbine drivetrain. However, if shaft is longer and thinner than other parts, two components which are connected by shaft affect each other by rotation about bending axis. It means that there are deflections of shaft about not only torsional direction but also bending direction. In this research, we introduced spherical joint which have 3 spring stiffness about all rotational axis to define shaft. And we analyzed that how shaft bending affect drivetrain rotation, translation motion and gear mesh contact force. To do these processes, we simulated the 3-dimensional wind turbine drive train model which has bearing stiffness, gear mesh stiffness, and shaft flexibility. The gear mesh stiffness was defined by Fourier series. And the equation of motion was acquired by Lagrange equation and kinematical constraints to represent shaft flexibility. About numerical analysis, the Newmark method was used to get results. Lastly, fast Fourier transform which converts results from time domain to frequency was used.
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These authors equally contributed to this work as first author.
Recommended by Associate Editor Junhong Park
Wei Shi received his B.S. degree from Yanbain University, China, in 2006, and Ph.D. degree from Pohang University of Science & Technology, Korea, in 2013. He is currently an Associate Professor at Dalian University of Technology in China. His research interests include drivetrain dynamics, offshore wind turbine dynamics.
Yonghui Park got Ph.D. degree from Pohang University of Science & Technology, South Korea in 2014. Currently he is a Researcher at the Pohang Institute of Metal Industry Advancement. His current research interests are analysis of mechanical system using the multi-body dynamics, and new design solution by reliability based design optimization.
Hyunchul Park received his B.S. degree from Seoul National University, South Korea in 1974, and M.S., Ph.D. degrees from University of IOWA, USA, in 1981 and 1985. He is currently a Professor at the Graduate School of Engineering mastership at Pohang University of Science & Technology.
Dezhi Ning received his Ph.D. degrees from Dalian University of Technology, China, in 2005. He is currently a Professor at the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology.
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Shi, W., Park, Y., Park, H. et al. Dynamic analysis of the wind turbine drivetrain considering shaft bending effect. J Mech Sci Technol 32, 3065–3072 (2018). https://doi.org/10.1007/s12206-018-0609-7
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DOI: https://doi.org/10.1007/s12206-018-0609-7