Transactions of Nanjing University of Aeronautics & Astronautics
Special Issue for Wind Turbine
Aeroelastic responses calculation for wind turbine blade considering the bend-twist coupled effect
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Abstract:
The Euler-Bernoulli beam model coupled with the sectional properties achieved by the VABS method was used to construct the blade structure model. Combined the aerodynamic loads calculated by the unsteady blade element momentum model with dynamic inflow and dynamic stall correction, the dynamics equations of blade was built. The Newmark implicit algorithm was used to solve the dynamics equations. Results of the sectional properties and blade structure model were compared with the multi-cell beam method and the ANSYS using shell elements. It was proved that the method was very effective and had high precision. And the effects on the aeroelastic response caused by bend-twist coupling were analyzed. The coupling effects made the torsional direction deform toward to the upwind direction. The aerodynamic loads and the displacement were reduced.
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