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Semi-submersible Production Unit Design and Optimization

ZHOU Jia;WEI Zhiyuan;WANG Pu;Marine Engineering Department,708Research Institute;  
An Semi-submersible unit(SEMI)design procedure is introduced.Focus on the impact of main dimensions changes on the overall performance of the platform.The main dimensions of the SEMI is checked by optimization concepts and methods.The key design input parameters have been got.And an improvement design concept was given.To minimize the steel weight and enlarge the variable load,the structure scantlings are optimized to be lightened.The typical scantling is reduced about 8% structural weight of the pontoon after the optimization.Then the optimization strategies and results would be useful for the offshore engineers.
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