Kabir Khan
Independent Researcher
India
Abstract
The modal analysis of wind turbine blades is crucial to predict their dynamic behavior and ensure structural integrity under operational loads. This study presents a comprehensive finite element method (FEM)-based modal analysis of a horizontal-axis wind turbine blade. The blade is modeled using shell and solid elements to capture its geometry and material properties accurately. The natural frequencies and corresponding mode shapes are computed, focusing on flapwise, edgewise, and torsional vibrations. The effects of blade material properties and boundary conditions on the modal characteristics are investigated. The results provide critical insights into resonance avoidance, fatigue life, and blade design optimization. This research emphasizes the importance of FEM modal analysis as a predictive tool in wind turbine blade design and performance evaluation.
Keywords
Modal Analysis, Wind Turbine Blade, Finite Element Method, Natural Frequencies, Mode Shapes, Structural Dynamics
REFERENCES
- Chi Chen, Min Wang & Long Zou (2013) – “Modal Analysis of Wind Turbine Blades Based on ANSYS Modeling”, Advanced Materials Research, Vol. 790, pp. 655–658. ANSYS APDL used for modeling a 1.2 MW HAWT blade and extracting natural frequencies & mode shapes org+15scientific.net+15researchgate.net+15.
- di Lorenzo, S. Manzato, M. Luczak, B. Peeters & K. Branner (2019) – “Strain-based operational modal analysis for wind turbine blades”, in 8th IOMAC 2019 (conference). Presents OMA coupled with FE-model validation via strain gauge pull‑release tests orbit.dtu.dk.
- Aral Sarrafi, Zhu Mao, Christopher Niezrecki & Peyman Poozesh (2018) – “Vibration‑Based Damage Detection in Wind Turbine Blades using Phase‑Based Motion Estimation and Motion Magnification”, arXiv. Shows experimental & numerical modal analysis of a 2.3 m blade net+3arxiv.org+3en.wikipedia.org+3.
- Navid Navadeh, Ivan Goroshko, Yaroslav Zhuk, Farnooshem Moghadam & Arash Fallah (2021) – “Finite Element Analysis of Wind Turbine Blade Vibrations”, Vibration 4(2):310–322. Uses ABAQUS modal analysis with pulse loading benchmark comparisons com+1researchgate.net+1.
- Structural and Modal Analysis of a Small Wind Turbine Blade (2022) – MDPI Energies study investigating modal properties of a 900 W blade per IEC standards using FEM org+13mdpi.com+13sandv.com+13.
- “Modal analysis of an iced offshore composite wind turbine blade” (2021) – Investigates natural frequencies and mode shapes under icing conditions via FE simulation and experiment sagepub.com.
- Experimental Modal Analysis of Research‑Sized Wind Turbine Blades (2010) – A test-based study detailing modal testing of prototype blades com.
