Mechanical Property Analysis and Structure Optimization of FH28-105 Annular BOP Shell
The FH28-105 annular BOP shell was taken as the research object,combined with its different load characteristics under different working conditions,and the mechanical behavior characteristics and stress of the shell under hydrostatic test pressure and rated working pressure were obtained by combining theoretical calculation and finite element method,and its dangerous parts were obtained and the strength design was evaluated.Through multi-objective optimiza-tion,the structural dimensions of the annular BOP housing were optimized with the goal of weight reduction,taking into account the strength of the shell and the test standard.The results show that the strength of the annular BOP shell meets the requirements,and the dangerous parts appear at the circular chamfer position of the shell clamp groove and the excessive chamfer posi-tion under the shell cavity.The final optimization scheme of the annular BOP meets the strength requirements.Compared with the original structure,the optimization range of mass and plastic strain are the highest,with values of 19.7％and 15.6％,respectively,while other targets have been reduced to varying degrees,thus realizing the weight reduction optimization of the shell un-der the condition of ensuring the strength standard.
annular BOPBOP shellmechanical propertyfinite element analysisstructure opti-mizationmulti-objective optimization
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