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.
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
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.
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.
