Análise estática e dinâmica de diferentes geometrias de fundações superficiais de aerogeradores

• Autor(a) principal: Ribeiro, Robson
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/40619
• topic: Solo. Estrutura. Fundações rasas. Aerogeradores.

Nowadays, with the constant growing of the wind energy industry it became necessary to study more about wind turbine foundations, focusing in archive foundations capable of withstand with taller and more slender tower structures. This paper aims to compare three different wind turbine shallow foundations geometries, those being: circular, square and octagonal footings. The analyses were carried out using SAP 2000, a Finite Element Method (FEM) software. Modal analyses were also carried out to investigate the influence of changing the foundation’s geometries in the dynamic behavior of the system. The following comparative analyses were made: bending moment; rotational stiffness; influence of subgrade reaction modulus change in the bending moment and rotation stiffness and the influence of foundation’s stiffness in the global rotational stiffness. Besides that, the dynamic analyses were carried out using three different lumped parameters models: rigid support model; flexible support model considering the foundation rigid and flexible support model considering the foundation and soil flexibility modeling the foundation using FEM. The results shown that the square foundation have the best performance, showing the lowest bending moments and the largest rotational stiffness. Besides that, the dynamic analyses didn’t show much difference between the geometries, however, when the FEM model was used the square foundation was stiffer than the others.