Abstract:A novel approach for creating highly detailed finite element models of wind turbine blades is presented. The approach is implemented as a software tool which handles all the different steps of the model creation process. The novel approach considers the blade to consist of a collection of parametric predefined blocks. This allows wind turbine blade models consisting of shell elements, solid elements or combinations to be created. By including the tools to accurately partition the outer mold layer, create the required offset surfaces and calculate accurate element-wise material orientations, a high level of detail and fidelity can be achieved.Keywords: wind turbine blade, finite element modelling, solid mesh
IntroductionWind turbine blade designs have been increasing in size during the last decades. They are complex structures, both in terms of shape and layup of composite materials. The rotor is at the very beginning of the energy conversion chain, turning airflow into mechanical energy. Consequently, the blades are at the beginning of a cost cascade system. For example, reducing the blade mass allows for cost savings in many other turbine components. Meanwhile, the aerodynamic performance directly contributes to the overall cost of energy (COE) of the turbine. As a result, there is great value in optimizing blades. Nevertheless, current wind turbine blades are often designed with relatively high safety factors. However, relatively large