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IJME 421

Paper Title: An Optimization Model for Preliminary Stability and Configuration Analyses of Semi-Submersibles



G D Gosain, Oceaneering Subsea Distribution Solutions, India
R Sharma, Design and Simulation Laboratory, Department of Ocean Engineering, IIT Madras, India
Tae-wan Kim, Department of Naval Architecture and Ocean Engineering, SNU, Republic of Korea


In the modern era of design governed by economics and efficiency, the preliminary design of a semi-submersible is critically important because in an evolutionary design environment new designs evolve from the basic preliminary designs and the basic dimensions and configurations affect almost all the parameters related to the economics and efficiency (e.g. hydrodynamic response, stability, deck load and structural steel weight of the structure, etc.). The present paper is focused on exploring an optimum design method that aims not only at optimum motion characteristics but also optimum stability, manufacturing and operational efficiency. Our proposed method determines the most preferable optimum principal dimensions of a semi-submersible that satisfies the desired requirements for motion performance and stability at the preliminary stage of design. Our proposed design approach interlinks the mathematical design model with the global optimization techniques and this paper presents the preliminary design approach, the mathematical model of optimization. Finally, a real world design example of a semi-submersible is presented to show the applicability and efficiency of the proposed design optimization model at the preliminary stage of design.


Transactions RINA, Vol 159, Part A3, International Journal Maritime Engineering, Jul-Sep 2017 

DOI Number

DOI No: 10.3940/rina.ijme.2017.a3.421

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