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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.23 No.5
- 발행연도
- 2019.1
- 수록면
- 405 - 420 (16page)
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초록· 키워드
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In this study, vibration characteristics of offshore wind turbine tower (WTT) with gravity-based foundation (GBF) are identified from dynamic responses under wave-induced excitations. The following approaches are implemented to achieve the objective. Firstly, the operational modal analysis methods such as frequency domain decomposition (FDD) and stochastic subspace identification (SSI) are selected to estimate modal parameters from output-only dynamic responses. Secondly, a GBF WTT model composed of superstructure, substructure and foundation is simulated as a case study by using a structural analysis program, MIDAS FEA. Thirdly, wave pressures acting on the WTT structure are established by nonlinear regular waves which are simulated from a computational fluid software, Flow 3D. Wave-induced acceleration responses of the target structure are analyzed by applying the simulated wave pressures to the GBF WTT model. Finally, modal parameters such as natural frequencies and mode shapes are estimated from the output-only acceleration responses and compared with the results from free vibration analysis. The effect of wave height and period on modal parameter extraction is also investigated for the mode identification of the GBF WTT.
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참고문헌 (36)
참고문헌 신청
Barkan, D. D. / 1962 / Dynamics of bases and foundations / McGraw-Hill Book Co
Brinker, R. / 2006 / Understanding stochastic subspace identification / Proceedings of the 24th International Modal analysis Conference
Brinker, R. / 2001 / Modal identification of output-only systems using frequency domain decomposition / Smart Mater. Struct 10:441~445
4Coffshore
Arundhuti Banerjee / 2018 / Stochastic Dynamic Analysis of an Offshore Wind Turbine Considering Frequency-Dependent Soil–Structure Interaction Parameters / International Journal of Structural Stability and Dynamics 18(06)
Brinker, R. / 2006 / Understanding stochastic subspace identification / Proceedings of the 24th International Modal analysis Conference
Brinker, R. / 2001 / Modal identification of output-only systems using frequency domain decomposition / Smart Mater. Struct 10:441~445
4Coffshore
Arundhuti Banerjee / 2018 / Stochastic Dynamic Analysis of an Offshore Wind Turbine Considering Frequency-Dependent Soil–Structure Interaction Parameters / International Journal of Structural Stability and Dynamics 18(06)
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