海上钻井平台折臂抓管机设计

Design of Knuckle Boom Pipe Crane for Offshore Drilling Platform

为打破海上钻井平台抓管机国外设计垄断，加快实现抓管机装备国产化，基于API-2C标准和实际工程经验，给出折臂抓管机的设计流程和方法，设计一种3．5t折臂抓管机，并采用规范和有限元相结合的方法对垂直动态系数的计算和选取进行了探讨。该设计成功应用到自升式钻井平台上，对垂直动态系数的研究表明，抓管机整机垂向刚性及影响因子随着作业半径的减小而变大，当起升速度较大时，垂直动态系数随作业半径变化尤为显著，采用同一垂直动态系数进行设计，会使设计偏于保守。

In order to improve the foreign technology monopoly and accelerate the localization of pipe crane, the design method and overall design plan of a 3.5 t knuckle boom pipe crane for offshore drilling platform were provided based on API-2C standards and engineering experiences. The calculation and selection of vertical dynamic coefficient were discussed by using the combination of the standard and finite element method. The 3.5 t crane had been successfully applied to self-elevating drilling platform. The study about vertical dynamic coefficient showed that crane vertical stiffness and influence factor increases with decreasing the working radius, and it changes obviously with the change of working radius when the hoisting velocity of crane is large. It will be conservative that crane design is conducted by using same vertical dynamic coefficient.