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Earthquakes and Structures Volume 21, Number 6, December 2021 , pages 587-599 DOI: https://doi.org/10.12989/eas.2021.21.6.587 |
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Optimization sensor placement of marine platforms using modified ECOMAC approach |
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Hamidreza Vosoughifar, Ali Yaghoubi, Milad Khorani, Pooya Biranvand and Seyedehzeinab Hosseininejad
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| Abstract | ||
| The modified-ECOMAC approach to monitor and investigate health of structure in marine platforms was evaluated in this research. The material properties of structure were defined based on the real platform located in Persian Gulf. The nonlinear time-history analyses were undertaken using the marine natural waves. The modified- ECOMAC approach was designed to act as the solution of the best sensor placement according to structural dynamic behavior of structure. This novel method uses nonlinear time-history analysis results as an exact seismic response despite the common COMAC algorithms utilize the eigenvalue responses. The processes of modified-ECOMAC criteria were designed and developed by author of this paper as a toolbox of Matlab. The Results show that utilizing an efficient ECOMAC method in SHM process leads to detecting the critical weak points of sensitive marine platforms to make better decision about them. The statistical results indicate that considering modified ECOMAC based on seismic waves analysis has an acceptable accuracy on identify the sensor location. The average of statistical comparison of COMAC and ECOMAC via modal and integrated analysis, had a high MAE of 0.052 and RSME of 0.057 and small R2 of 0.504, so there is significant difference between them. | ||
| Key Words | ||
| COMAC; ECOMAC; offshore platform; OSP | ||
| Address | ||
| Hamidreza Vosoughifar: Department of Civil Engineering, Islamic Azad University, Tehran South Branch, 1777613651, Tehran, Iran Department of Civil and Environment Engineering, Hawaii University at Mano, Hawaii, 96822, USA Ali Yaghoubi: Department of Civil Engineering, Islamic Azad University, Tehran South Branch, 1777613651, Tehran, Iran Milad Khorani: Department of Civil Engineering, Islamic Azad University, Tehran South Branch, 1777613651, Tehran, Iran Pooya Biranvand: Department of Civil Engineering, Islamic Azad University, Tehran South Branch, 1777613651, Tehran, Iran Seyedehzeinab Hosseininejad:Department of Civil Engineering, Islamic Azad University, Tehran South Branch, 1777613651, Tehran, Iran | ||