@article{Algolfat_Weizhuo Wang_Alhussein Albarbar_2022, title={Dynamic Responses Analysis  of A 5MW NREL Wind Turbine Blade under Flap-Wise and Edge-Wise Vibrations}, volume={1}, url={https://ojs.istp-press.com/dmd/article/view/108}, DOI={10.37965/jdmd.2022.108}, abstractNote={<p><span dir="ltr" role="presentation">A wind turbine is subjected to a regime of varying loads. For example, each rotor revolution causes a </span><span dir="ltr" role="presentation">complete gravity stress reversal in the low-speed shaft, and there are varying stresses from the out-of-plane loading </span><span dir="ltr" role="presentation">cycle due to</span> <span dir="ltr" role="presentation">fl</span><span dir="ltr" role="presentation">uctuating wind load. Consequently, wind turbine blade design is governed by fatigue rather than </span><span dir="ltr" role="presentation">ultimate load considerations. Previous studies have adopted many different beam theories, using different </span><span dir="ltr" role="presentation">techniques and codes, to model the National Renewable Energy Laboratory (NREL) 5 MW offshore wind turbine </span><span dir="ltr" role="presentation">blade. There are differences, from study to study, in the free vibration results and the dynamic response. The</span><br role="presentation" /><span dir="ltr" role="presentation">contribution of this study is to apply the code written by the authors to the different beam theories used with </span><span dir="ltr" role="presentation">the aim of comparing the different beam theories presented in the literature and that developed by the authors. This </span><span dir="ltr" role="presentation">paper reports the investigation of the effects of deformation parameters on the dynamic characteristics of the </span><span dir="ltr" role="presentation">NREL 5 MW offshore wind turbine blades predicted by the different beam theories. The investigation of free </span><span dir="ltr" role="presentation">vibrations is a fundamental step in the analysis of structural dynamics, and this study compares different </span><span dir="ltr" role="presentation">computational structural methods and investigates their effect on the predicted dynamic response. The modal</span><br role="presentation" /><span dir="ltr" role="presentation">characteristics of every model examined have been combined with strip theory to determine the dynamic response </span><span dir="ltr" role="presentation">of the blade.</span></p> <p><span dir="ltr" role="presentation"><strong>Conflict of Interest Statement</strong><br />The authors declare no conflicts of interest.</span></p>}, number={4}, journal={Journal of Dynamics, Monitoring and Diagnostics}, author={Algolfat, Amna and Weizhuo Wang and Alhussein Albarbar}, year={2022}, month={Sep.}, pages={208–222} }