悬臂式钻井平台悬臂梁振动特性研究

摘要

根据海上悬臂式钻井平台的结构特点,结合海上作业的实际情况,考虑平台受到的均布载荷与集中载荷,建立了悬臂式钻井平台在作业状态条件下的力学模型,并推导出了悬臂梁挠曲方程和振动频率求解方程.通过算例,分析了悬臂梁外伸距离、甲板质量、井深等对钻井平台振动频率的影响规律.本文研究结果对提高井口及井下工具作业安全有指导意义.%According to the structural feature of offshore cantilever drilling platform, the mechanical model is built considering the uniformly distributed load and point load and associating with actual offshore operation. And the bending flexure equation and vibration frequency equation of cantilever beam are also derived. The influence of cantilever overhanging distance, deck mass and well depth on the vibration frequency of the platform is analyzed through the case calculation. The study results are significant for improving the safety of well head and down hole operations.