自升式平台压载作业桩腿侧向滑移的极限RPD  

Ultimate RPD of Spudcan Lateral Sliding During Jack-up Installation Near Old Footprints

作　　者：高畅[1] GAO Chang(Offshore Engineering Technology Center,CCS,Tianjin 300457,China)

机构地区：[1]中国船级社海工技术中心

出　　处：《中国海洋平台》2019年第4期72-77,86,共7页China offshore Platform

摘　　要：对“踩脚印”过程的齿条相位差(Rack Phase Difference,RPD)计算原理进行研究,推算适用于桩腿侧滑的RPD计算方法;采用有限元分析方法模拟桩腿在不同方向、不同距离的侧滑,计算自升式平台桩腿、升降系统以及固桩区结构强度,确定平台系统的临界极限能力;通过搜索,最终确定平台“踩脚印”时的极限RPD值。将RPD理论应用于自升式平台“踩脚印”插桩过程,当桩腿变形接近临界值时,RPD监测系统报警并提醒作业者及时调整平台插桩状态,可有效减少桩脚的侧滑风险,对设计者和作业者有很强的指导作用,具备较高的应用价值。The Rack Phase Difference(RPD)calculation principle is studied for the penetration on existing footprints and an available analysis method of critical RPD applicable to spudcan lateral sliding is obtained.By the finite element method,the lateral sliding of spudcan in different directions and different distances is simulated,the structural strength of the pile leg,jacking system and hull structure are calculated,and the ultimate capacity of the platform is determined.Using the iterative searching method,the allowable RPD value during spudcan sliding can be obtained.When the deformation of the legs reaches the critical value,the RPD monitoring system gives an alarm.The necessary adjustment must be made in time to reduce the risk of spudcan sliding.The method can provide useful guidance for the designers and operators.

关 键 词：自升式平台 踩脚印 侧向滑移 齿条相位差(RPD) 

分 类 号：TE951[石油与天然气工程—石油机械设备]