Finite Element Analysis of SHAFT - (250kW Wind Turbine)

  • The shaft of wind turbine(250kW) was subjected to bending moment and forces.
  • FE Analysis was performed on the shaft to ensure the shaft could handle the loads.
  • Linear static analysis was performed to check the stresses and displacement developed in the shaft.
  • It was observed that stresses and displacement developed in the shaft were within the range of allowable stress.
  • It was concluded that the shaft can handle the loads. Design and Analysis was approved for DNV certification.

Finite Element Analysis of Wind Turbine Tower

  • FEA modeling of a wind turbine tower Analysis:
    • Static analysis
    • Buckling analysis
    • Vibration analysis
  • Want to prevent
    • Yielding
    • Excessive deflection
    • Resonance

Loading and Conditions of Operation :

  • FEA modeled for high winds
  • Constraints:
    • Rigid constraint at base
    • Cables (“ropes”)
  • Loads:
    • Weight of blades and bracket
    • Torque
    • Wind drag

FE Analysis of Wind Turbine Tower

FE Analysis of Wind Turbine Blade

  • The stress and vibration analysis on the blade was performed under the operating and parked conditions.
  • The blade was designed to operate optimally at a much lower wind speed which is typically prevailing in India.
  • The effect of the gravity and torque acting in the blade were studied.
  • The stresses in the glass fiber were relatively low when compared with that of the spar.
  • The maximum stress was observed in the root of the spar.

Dynamic Analysis of Blade

  • The natural frequencies of the wind turbine system should be kept away from the possible excitation sources in order to keep dynamic stresses under control.
  • The natural frequencies of the wind turbine blade and the associated mode shapes in the non-rotating and rotating conditions are predicted.
  • These frequencies are found well separated from the wind turbine harmonic excitations.