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Time History Dynamic Analysis of a New Constructed Offshore Jacket Platform in Persian Gulf Due to Random Waves

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Abstract

API RP2A WSD is a design code in practice for design of jacket platforms in the Persian Gulf but is based on the Gulf of Mexico environmental condition. So for the sake of using this code for the Persian Gulf, it is better to perform a calibration based on this specific region. Analysis and design of jacket platforms based on API code are performed in a static manner and dynamic analysis is not recommended for such structures. Regarding the fact that the real behavior of the offshore jacket platforms is a dynamic behavior, so in this research, dynamic analysis for an offshore jacket platform in the Persian Gulf under extreme environmental condition is performed using random time domain method. Therefore, a new constructed offshore jacket platform in the Persian Gulf is selected and analyzed. Fifteen, 1-h storm, simulations for the water surface elevation is produced to capture the statistical properties of extreme sea condition. Time series of base shear and overturning moment are derived from both dynamic and static responses. By calculating the maximum dynamic amplification factor (DAF) from each simulation and fitting the collected data to Weibull distribution, the most probable maximum extreme (MPME) value for the DAF is achieved. Results show that a realistic value for DAF for this specific platform is 1.06, which is a notable value and is recommended to take into practice in design of fixed jacket platform in the Persian Gulf.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Petroleum University of Technology, Abadan, Iran

    Abdolrahim Taheri & Ehsan Shahsavari

Authors
  1. Abdolrahim Taheri
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  2. Ehsan Shahsavari
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Correspondence to Abdolrahim Taheri.

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Article Highlights

• Dynamic response of a jacket type offshore platform in the Persian Gulf is investigated by using the random time domain analysis.

• In order to perform dynamic analysis, fifteen 1-hour storm, simulations for the water surface elevation are produced to capture the statistical properties of extreme sea condition.

• Results show that a realistic value for DAF is a noticeable value and can be extended to other platforms with similar dynamic characteristics of this region.

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Taheri, A., Shahsavari, E. Time History Dynamic Analysis of a New Constructed Offshore Jacket Platform in Persian Gulf Due to Random Waves. J. Marine. Sci. Appl. 18, 372–379 (2019). https://doi.org/10.1007/s11804-019-00098-2

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  • DOI: https://doi.org/10.1007/s11804-019-00098-2

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