Articles | Volume 9, issue 1
Research article
16 Jan 2024
Research article |  | 16 Jan 2024

Nonlinear vibration characteristics of virtual mass systems for wind turbine blade fatigue testing

Aiguo Zhou, Jinlei Shi, Tao Dong, Yi Ma, and Zhenhui Weng

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Thematic area: Wind technologies | Topic: Design concepts and methods for plants, turbines, and components
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Cited articles

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DNV GL AS: DNVGL-ST-0376 – Rotor blades for wind turbines, ST/2015-12/DNVGL-ST-0376.pdf (last access: 7 June 2019), 2015. 
Falko, B.: Biaxial Dynamic Fatigue Tests of Wind Turbine Blades, PhD thesis, Leibniz University Hannover, Hannover, Germany, (last access: 28 October 2023), 2020. 
Greaves, P. R., Dominy, R. G., Ingram, G. L., Long, H., and Court, R.: Evaluation of dual-axis fatigue testing of large wind turbine blades, P. I. Mech. Eng. C-J. Mec., 226, 1693–1704,, 2012. 
Hughes, S., Musial, W. D., and Stensland, T.: Implementation of a Two-Axis Servo-Hydraulic System for Full-Scale Fatigue Testing of Wind Turbine Blades, Tech. rep., National Renewable Energy Lab., Golden, CO, USA, (last access: 28 October 2023), 1999. 
Short summary
This paper explores the nonlinear influence of the virtual mass mechanism on the test system in blade biaxial tests. The blade theory and simulation model are established to reveal the nonlinear amplitude–frequency characteristics of the blade-virtual-mass system. Increasing the amplitude of the blade or decreasing the seesaw length will lower the resonance frequency and load of the system. The virtual mass also affects the blade biaxial trajectory.
Final-revised paper