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Structural Engineering and Mechanics Volume 63, Number 3, August10 2017 , pages 303-315 DOI: https://doi.org/10.12989/sem.2017.63.3.303 |
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Response surface methodology based multi-objective optimization of tuned mass damper for jacket supported offshore wind turbine |
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Mohammad S. Rahman, Mohammad S. Islam, Jeongyun Do and Dookie Kim
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| Abstract | ||
| This paper presents a review on getting a Weighted Multi-Objective Optimization (WMO) of Tuned Mass Damper (TMD) parameters based on Response Surface Methodology (RSM) coupled central composite design and Weighted Desirability Function (WDF) to attenuate the earthquake vibration of a jacket supported Offshore Wind Turbine (OWT). To optimize the parameters (stiffness and damping coefficient) of damper, the frequency ratio and damping ratio were considered as a design variable and the top displacement and frequency response were considered as objective functions. The optimization has been carried out under only El Centro earthquake results and after obtained the optimal parameters, more two earthquakes (California and Northridge) has been performed to investigate the performance of optimal damper. The obtained results also compared with the different conventional TMD\'s designed by Den Hartog\'s, Sadek et al.\'s and Warburton\'s method. From the results, it was found that the optimal TMD based on RSM shows better response than the conventional damper. It is concluded that the proposed response model offers an efficient approach regarding the TMD optimization. | ||
| Key Words | ||
| weighted multi-objective optimization; tuned mass damper; response surface methodology; weighted desirability function; offshore wind turbine | ||
| Address | ||
| Mohammad S. Rahman, Mohammad S. Islam: Civil and Environmental Engineering, Kunsan National University, 558 Daehak-ro, Gunsan-si 54150, Republic of Korea Jeongyun Do and Dookie Kim: Industry-University Cooperation Foundation, Kunsan National University, 558 Daehak-ro, Gunsan-si 54150, Republic of Korea | ||