圆筒型FPSO阻尼板结构强度计算方法研究

On Calculation Method for Structural Strength of Cylindrical FPSO Damping Box

阻尼板作为增加圆筒型FPSO附连水质量和黏性阻尼的关键装置,可有效降低垂荡和横摇运动。阻尼板通常为与柱型筒体相连的悬臂梁式箱型结构,阻尼板及其与筒体连接区域处的结构设计及强度校核是圆筒型FPSO结构设计的关键。以阻尼板处最大压力及最大阻尼力作为目标设计载荷,采用子模型法校核其结构强度,以总强度分析得到的变形作为子模型边界条件,采用Morison法模拟黏性阻尼载荷,对阻尼板结构强度进行校核分析,为阻尼板的结构设计提供依据和指导。

The damping box is the key device to improve the added water mass and the viscous damping effect for the cylindrical Floating Production Storage and Offl oading(FPSO),which can effectively reduce heave and roll motion.The damping box is usually the cantilever box-like structure connected with the cylinder.The structural design and strength check of the damping box and its connection with the cylinder are critical to the structural design of the cylindrical FPSO.The maximum pressure and maximum damping force of the damping box are taken as the objective design load.It carries out the check and analysis of the structural strength of the damping box by using the sub-model method to check the structural strength of the damping box,taking the deformation obtained from the total strength analysis as the boundary condition,and the Morison method to simulate the viscous damping effect.It can provide reference for the structural design of the damping box.