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Design for resonance area avoidance by changing the geometry of offshore wind turbine substructuresopen accessDesign for resonance area avoidance by changing the geometry of offshore wind turbine substructures

Other Titles
Design for resonance area avoidance by changing the geometry of offshore wind turbine substructures
Authors
안성환이종현
Issue Date
2021
Publisher
한국마린엔지니어링학회
Keywords
Semi-submersible; Damping; Tri-pod; Heave plate; ANSYS AQUA
Citation
한국마린엔지니어링학회지, v.45, no.1, pp.31 - 36
Indexed
KCI
Journal Title
한국마린엔지니어링학회지
Volume
45
Number
1
Start Page
31
End Page
36
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/4549
DOI
10.5916/jamet.2021.45.1.31
ISSN
2234-7925
Abstract
The larger the topside tower size, the more the fatigue loads can generate, especially at the connection joints; additionally, problems due to resonance occur in the high-frequency area due to the movement of the tower blades and substructure. Therefore, the resonant area generated the motion of the tower blades and substructure must be considered when designing the structure. Therefore, the purpose of this study is to change the tower shape based on the substructure of a 12 MW offshore wind generator designed using the expansion method to identify the inherent vibration area of the structure's six-degrees-of-freedom (6DoF) motion. Moreover, the movement trends of the resonant areas per case are analyzed based on the tower rotor speed to present the designs to follow and avoid for the resonant areas. Seven models were designed for the transformed model, and a 6DoF motion response analysis was performed according to the wave incidence angle. In addition, the tower rotor speed frequency and substructure frequency were compared and analyzed, and an avoidance design method was presented to show the effect of 6DoF on the structure.
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해양과학대학 (조선해양공학과)
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