Respuesta sísmica de turbinas eólicas considerando un análisis de interacción suelo estructura
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Fecha
2021
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad Andrés Bello
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Licencia CC
Licencia CC
Resumen
En la presente memoria se muestran los resultados del análisis sísmico considerando interacción
suelo-estructura realizado a una turbina eólica (o aerogenerador) con 60 m de altura de mástil, 5 m de
diámetro de base anular y 2.5 m en su punto más alto, ubicada en una zona sísmica 3 (NCh2369); el
sistema de fundaciones corresponde a una losa de fundación de 30m de diámetro, 3m de espesor de
cimiento, y sello de fundación Df igual a 3m, la cual está apoyada sobre un suelo arenoso
medianamente denso clasificado como Tipo III (NCh2369) y como Tipo D (ASCE7-16), considerando
3 condiciones de apoyo en la base de la torre: una base rígida (empotramiento perfecto), una base
flexible con solo rigidez dinámica y una base flexible con rigidez dinámica y amortiguamiento.
Los resultados obtenidos arrojaron un aumento de entre un 0.7% a un 2% en el periodo fundamental
en las bases flexibles respecto de la base rígida, esto se vio reflejado en el caso del apoyo solo con
rigidez dinámica en una disminución del corte sísmico de entre un 0.2% a un 0.8% y un aumento en
los desplazamientos debido a sismo a la altura de buje (h=61.5m) de entre un 0.3% a un 0.5%,
mientras que para el caso del apoyo con rigidez dinámica y amortiguamiento se observó una
disminución del corte sísmico de entre un 4.4% a un 8.4% y una disminución en los desplazamientos
debido a sismo a la altura de buje de entre un 1% a un 2.2%.
This report shows the results of the seismic analysis considering the soil-structure interaction carried out on a wind turbine (or wind turbine) with a 60 m mast height, 5 m diameter annular base and 2.5 m at its highest point, located in a seismic zone 3 (NCh2369); The foundation system corresponds to a foundation slab of 30m in diameter, 3m of foundation thickness, and a foundation seal Df equal to 3m, which is supported on a moderately dense sandy soil classified as Type III (NCh2369) and as Type D (ASCE7-16), considering 3 support conditions at the base of the tower: a rigid base (perfect embedment), a flexible base with only dynamic stiffness and a flexible base with dynamic stiffness and damping. The results obtained showed an increase of between 0.7% to 2% in the fundamental period in the flexible bases with respect to the rigid base, this was reflected in the case of the support only with dynamic stiffness in a decrease in the seismic cut of between 0.2% to 0.8% and an increase in displacement due to earthquake at the hub height (h = 61.5m) of between 0.3% to 0.5%, while in the case of support with dynamic stiffness and damping, observed a decrease in the seismic cut from between 4.4% to 8.4% and a decrease in displacements due to earthquake at the hub height of between 1% to 2.2%.
This report shows the results of the seismic analysis considering the soil-structure interaction carried out on a wind turbine (or wind turbine) with a 60 m mast height, 5 m diameter annular base and 2.5 m at its highest point, located in a seismic zone 3 (NCh2369); The foundation system corresponds to a foundation slab of 30m in diameter, 3m of foundation thickness, and a foundation seal Df equal to 3m, which is supported on a moderately dense sandy soil classified as Type III (NCh2369) and as Type D (ASCE7-16), considering 3 support conditions at the base of the tower: a rigid base (perfect embedment), a flexible base with only dynamic stiffness and a flexible base with dynamic stiffness and damping. The results obtained showed an increase of between 0.7% to 2% in the fundamental period in the flexible bases with respect to the rigid base, this was reflected in the case of the support only with dynamic stiffness in a decrease in the seismic cut of between 0.2% to 0.8% and an increase in displacement due to earthquake at the hub height (h = 61.5m) of between 0.3% to 0.5%, while in the case of support with dynamic stiffness and damping, observed a decrease in the seismic cut from between 4.4% to 8.4% and a decrease in displacements due to earthquake at the hub height of between 1% to 2.2%.
Notas
Memoria (Ingeniero Civil)
Palabras clave
Turbinas Eólicas, Diseño y Construcción, Diseño Antisísmico