Activity: Examinations and supervision › Supervisor activities
Bend-twist coupling is a widespread passive control system for load alleviation, which can be realized in different ways. For example, by rotating the fibers of the skin or of the spar caps, by applying an offset to the spar caps keeping the webs straight, or by tilting them. Since wind turbines are characterized by some low-damped modes, their aeroelastic stability has to be carefully evaluated, but till now, the stability implications of bend-twist coupling are largely unknown. Using state of the art software, the student will first design blades with different types of bend-twist coupling. Then, he/she will estimate and discuss their aeroelastic stability and loads. This thesis will allow wind turbine manufacturers to apply the correct kind of bend-twist coupling for each blade design, and in turn reduce the cost of energy.