Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 12 2022 02 20 Out-of-Plane Vibration Mitigation of Wind Turbine Blade Using Highly Efficient Nonlinear Energy Sink Out-of-Plane Vibration Mitigation of Wind Turbine Blade Using Highly Efficient Nonlinear Energy Sink 5851 5866 4533 10.22060/mej.2021.19784.7111 FA Maziyar Daghighi School of Mechanical Engineering, Shahid Rajaee teacher training Uni. Ali Rahmani Hanzaki Faculty member with Mechanical engineering faculty, Shahid Rajaeeteacher training Uni. 0000-0002-2895-7176 Majid Shahgholi School of Mechanical Engineering-Shahid Rajaee teacher training Uni. Tehran-Iran 0000-0002-1134-068X Saeed Bab Niroo Research Institute,-Tehran-Iran Journal Article 2021 03 23 <span style="letter-spacing: .05pt;">Nowadays, the use of wind as one of the main sources of low carbon and renewable energy is expanding rapidly all around the world. Recently, with the development of wind farms and the increase in the size of wind turbines, the wind loads on them have increased, and as a result, they have become more difficult and expensive to maintain. Therefore, researchers have deeply focused on the analysis and the control of their vibration. In this study, a wind turbine blade with a type of nonlinear absorber, called highly efficient nonlinear energy sink is analyzed, furthermore the interaction between the heavy and long blade and the nonlinear energy sink, under the influence of gravity in the vertical plane and time-dependent wind force, which is due to its height dependency is examined. For this purpose, the equations of motion of the system are obtained by the energy method and solved numerically. The blade- nonlinear energy sink system behavior is compared to that of the blade and linear absorber system. Also, the sensitivity of the parameters affecting the performance of the nonlinear energy sink is analyzed and the vibration of the system with optimized nonlinear energy sink is compared with the alone blade and the blade with the optimal linear absorber behaviors.</span> <span style="letter-spacing: .05pt;">Nowadays, the use of wind as one of the main sources of low carbon and renewable energy is expanding rapidly all around the world. Recently, with the development of wind farms and the increase in the size of wind turbines, the wind loads on them have increased, and as a result, they have become more difficult and expensive to maintain. Therefore, researchers have deeply focused on the analysis and the control of their vibration. In this study, a wind turbine blade with a type of nonlinear absorber, called highly efficient nonlinear energy sink is analyzed, furthermore the interaction between the heavy and long blade and the nonlinear energy sink, under the influence of gravity in the vertical plane and time-dependent wind force, which is due to its height dependency is examined. For this purpose, the equations of motion of the system are obtained by the energy method and solved numerically. The blade- nonlinear energy sink system behavior is compared to that of the blade and linear absorber system. Also, the sensitivity of the parameters affecting the performance of the nonlinear energy sink is analyzed and the vibration of the system with optimized nonlinear energy sink is compared with the alone blade and the blade with the optimal linear absorber behaviors.</span> https://mej.aut.ac.ir/article_4533_56a8da1d3bcb2e9b334a778be5b1d781.pdf