Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

In order to capture more energy, wind turbines are rapidly growing in height and rotor size. This growth increases the likelihood that soil structure interaction effects may influence the structural dynamic response. Current 3 MW turbines tower over the landscape with an 80 meter hub height and a 90 meter rotor diameter. This paper models a full soil structure system for the National Renewable Energy Laboratory onshore 5 MW reference wind turbine with a hub height of 90 meter and a 126 meter rotor diameter. A detailed finite element model of the turbine is created, including a full three dimensional soil mesh to study the influence of soil structure interaction on the dynamic properties and response. The tower moment and shear demand is presented after the turbine is modeled on 3 - 15 meter thick soil profiles of varying stiffness and subjected to a 1994 Northridge Earthquake record. The investigation provides valuable insight into the extent that soil structure interaction influences the behavior of this new generation of large wind turbines.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Modeling the Influence of Soil Structure Interaction on the Seismic Response of a 5 MW Wind Turbine

San Diego, California

In order to capture more energy, wind turbines are rapidly growing in height and rotor size. This growth increases the likelihood that soil structure interaction effects may influence the structural dynamic response. Current 3 MW turbines tower over the landscape with an 80 meter hub height and a 90 meter rotor diameter. This paper models a full soil structure system for the National Renewable Energy Laboratory onshore 5 MW reference wind turbine with a hub height of 90 meter and a 126 meter rotor diameter. A detailed finite element model of the turbine is created, including a full three dimensional soil mesh to study the influence of soil structure interaction on the dynamic properties and response. The tower moment and shear demand is presented after the turbine is modeled on 3 - 15 meter thick soil profiles of varying stiffness and subjected to a 1994 Northridge Earthquake record. The investigation provides valuable insight into the extent that soil structure interaction influences the behavior of this new generation of large wind turbines.