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Transient Response Analysis by Impulse for Stresses at the Tip of Wind Turbine Blade along Y-Axis over a Time Interval

Thomas O. Onah

2025enwind turbineturbine bladestransient analysisfinite elementstructural stressvibration

Abstract

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Transient response analysis was conducted to evaluate stresses at the tip of a wind turbine blade along the Y-axis under an impulse load over a defined time interval. A 3D blade geometry was modeled in ANSYS using finite element analysis, with the blade material defined as Epoxy E-Glass Wet and mesh independence established between 800 and 600 element sizes; 800 elements were adopted for further study. An impulse force of 5000 N was applied at the blade tip in the Y-direction for 0.1 s, and the transient response was tracked over 0–5 s, including displacements in Y and Z and the corresponding Von Mises stress distribution. The Campbell diagram indicated a response amplitude of 5.5×10⁶ Pa at a frequency of 5 Hz, corresponding to a rotational speed of 262.4×10⁶ rpm. The transient response reached steady state at about 3.8 s within the 1–5 s interval, indicating a critically damped behavior with a damping ratio close to one. The results suggest that applying an impulse load at lower Von Mises stress levels leads to quicker damping and faster attainment of steady state, which is favorable for wind turbine blade design and analysis.

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Cite This Work

@article{d3db4562-c56a-467d-8902-7ee6a010fc48,
  title={Transient Response Analysis by Impulse for Stresses at the Tip of Wind  Turbine Blade along Y-Axis over a Time Interval  },
  author={Thomas O. Onah},
  year={2025},
  language={en}
}
TY  - JOUR
TI  - Transient Response Analysis by Impulse for Stresses at the Tip of Wind  Turbine Blade along Y-Axis over a Time Interval  
AU  - Thomas O. Onah
PY  - 2025
LA  - en
ER  -

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