Investigation of Soil-Structure Interaction Effects on Damage Detection of Wind Turbine Tower with Biorthogonal Wavelets

Document Type : Research Article

Authors

1 Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran.

2 Civil Engineering Group, Faculty of Engineering, University of Guilan, Rasht, Iran

3 Faculty/International Institute of Earthquake Engineering & Seismology (IIEES)

Abstract

The wind has been one of the cleanest sources of energy. The tendency to use wind turbines has been a growing trend in the world in recent decades. The size and capacity of wind turbines are increasing rapidly in order to obtain more wind energy. Statistics show that more giant turbines are more broken down and require more maintenance. Wind farm owners' goal is to monitor work to reduce downtime and increase the efficiency of each wind turbine. The wind turbine tower carries the entire wind turbine and is the second-largest cost of the wind turbine. Damage to the tower can endanger the entire wind turbine and cause extensive damage. However, the background to the study of the wind turbine tower’s health monitoring against its mechanical installations is insignificant. Besides, no comprehensive research has been conducted on the tower’s health monitoring with soil-structure interaction included. In this study, biorthogonal wavelets were used to process the mode shape of the damaged tower. The foundation is a square concrete foundation 20 m × 20 m and 1 m in depth. Two different soils, normally consolidated clay and dense sand, are considered. Eighteen failure scenarios were defined. This study indicates that the use of side-to-side mode shapes of the tower has a tangible advantage over its fore-aft mode shapes for detecting failure. Considering the desirable effect of soil-structure interaction on damage detection, it is necessary to examine this analysis’s effect.

Keywords

Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 6
September 2021
Pages 2581-2600

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