장기계측에 의한 2MW급 풍력발전 타워구조물의 동특성 평가

Title
장기계측에 의한 2MW급 풍력발전 타워구조물의 동특성 평가
Alternative Title
Evaluation of Dynamic Characteristics of 2MW Wind Turbine Tower Structure by Long-Term Measurement
Author(s)
김원술; 이진학; 이충기; 김석현
KIOST Author(s)
Yi, Jin Hak(이진학)
Publication Year
2017-04-20
Abstract
This study investigates dynamic characteristics of a 2MW wind turbine structure by long-term response monitoring with accelerometers, tiltmeter and strain gauges. The object wind turbine structure is located in Jeju Island, Korea. The natural frequency and damping ratio were evaluated by least-square frequency domain decomposition and random decrement technique using acceleration response data. As a result, it was found that natural frequencies with 1st, 2nd and 3rd modes, and blade passing frequencies with 1P, 2P and 3P were clearly showed from power spectral densities of acceleration reponses. Furthermore, 1st model frequencies were almost constant with increase in standard deviations of acceleration responses. Another notable observation was that when standard deviations of acceleration responses were small, damping ratios showed to diverge. However, when standard deviations of acceleration responses had large values, damping ratios were converged to about 0.5%.al frequency and damping ratio were evaluated by least-square frequency domain decomposition and random decrement technique using acceleration response data. As a result, it was found that natural frequencies with 1st, 2nd and 3rd modes, and blade passing frequencies with 1P, 2P and 3P were clearly showed from power spectral densities of acceleration reponses. Furthermore, 1st model frequencies were almost constant with increase in standard deviations of acceleration responses. Another notable observation was that when standard deviations of acceleration responses were small, damping ratios showed to diverge. However, when standard deviations of acceleration responses had large values, damping ratios were converged to about 0.5%.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/24051
Bibliographic Citation
한국복합신소재구조학회 2017년 학술발표회, pp.1 - 2, 2017
Publisher
한국복합신소재구조학회
Type
Conference
Language
Korean
Publisher
한국복합신소재구조학회
Related Researcher
Research Interests

Ocean Energy-Tidal Current Energy Converter System,Infrastructure Management-Structural Health Monitoring,Offshore Wind,해양에너지-조류발전시스템,시설물 유지관리-구조건전성 평가,해상풍력

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