海工建造中偏心吊笼的设计研究

Design and research of eccentric lifting cage in offshore structure construction

随着海洋工程模块建造的大型化和复杂化,常需要频繁地将施工物资吊运至导管架或模块内部的狭小空间中,因此需设计用于插入结构内部的偏心吊笼,以满足建造需求。从研究吊笼偏心吊装作业入手,得出吊笼结构强度、吊点强度、吊笼整体倾斜角度是保证偏心吊装安全的三个重要因素。结合某导管架工程的建造需求,通过采用有限元软件数值模拟吊笼吊装过程,设计了偏心吊笼结构。研究结果表明,设计后吊笼能偏心装载质量1.2 t,可伸入长度约5 m。吊笼建造后通过了吊装试验验证,并取得了中国船级社CCS认证。

As the offshore engineering modules become larger and significantly complicated,their components need to be frequently transported into the narrow space of the jackets or modules for construction.So a new type eccentric lifting cage is necessary for solving this problem.By researching the lifting operation of the new lifting cage,three important factors are found,i.e.the strength of lifting cage structure,the strength of lifting point and the slope angle of lifting cage,which determine the safety of the lifting.Base on the site construction requirements of a jacket project,the structure of the eccentric lifting cage is designed through FEA numerical simulation.The result shows that the eccentric lifting cage can meet requirements of the lifting operation with loaded mass of 1.2 t and extended length about 5 m into the jacket.The designed lifting cage has passed the lifting test and been certified by CCS.