Finite element models for analysis of structural integrity of onshore wind turbine foundations with embedded rings submitted to static and dynamic loads.

Resumo

Wind turbines’ share in the energy industry continues to grow, its status of renewable energy source
deeming it attractive due to environmental policies established worldwide. Most of these turbines are onshore
installations and are supported by steel towers connected to reinforced concrete foundations through embedded
rings (or insert rings), a type of structure with reported damages to the tower-foundation interface. This study
presents simulation procedures for this kind of foundation concerning their structural behavior. Emphasis is given
on the development of finite element models with the aid of the finite element software Abaqus. First, a linear 3D
model considering only equivalent static loads transferred through the embedded ring. Then, after estimation of
aerodynamic loads, a linear dynamic analysis. This methodology provides a valuable resource since the knowledge
of the model’s response to different load scenarios can be used to prevent deterioration in embedded ring
foundations, and future advances can guide maintenance and rehabilitation plans on existing wind turbine farms.