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http://dx.doi.org/10.11112/jksmi.2012.16.2.087

Damage Estimation Method for Wind Turbine Tower Using Modal Properties  

Lee, Jong Won (남서울대학교 건축공학과)
Bang, Je Sung (한국기계연구원 기계시스템안전연구본부)
Kim, Sang Ryul (한국기계연구원 기계시스템안전연구본부)
Han, Jeong Woo (한국기계연구원 기계시스템안전연구본부)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.16, no.2, 2012 , pp. 87-94 More about this Journal
Abstract
A damage estimation method of wind turbine tower using natural frequency and mode shape is presented for effective condition monitoring. Dynamic analysis for a wind turbine was carried out to obtain the response of tower from which modal properties were identified. A neural network was learned based on training patterns generated by the changes of natural frequency and mode shape due to various damages. The changes of modal property were calculated using a program for modal parameter estimation. Damage locations and severities could be successfully estimated for 10 damage cases including multi-damage cases using the trained neural network. The damage severities for very small damages generally tends to be slightly under-estimated however, the identified damage locations agreed reasonably well with the accurate locations. Enhancement of the estimation result for very small damage and verification of the proposed method through experiment will be carried out by further study.
Keywords
Tower; Wind Turbine; Damage Estimation; Natural Frequency; Mode Shape;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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