摘要
跨接管海上安装时,在穿越飞溅区的阶段受到较大的环境荷载,对现场安装海况有严格要求,使得安装作业效率较低。为扩大跨接管安装的容许海况,利用OrcaFlex软件建立了包括垂直连接器在内的完整跨接管安装分析模型,研究了撑杆配重、吊机吊高及作业半径、垂直连接器索具数量、波流方向等关键因素对跨接管所受应力的影响。结果表明:增加撑杆配重和减小吊机吊高及作业半径均无法有效降低跨接管穿越飞溅区时的最大应力响应,而增加垂直连接器索具数量、选择合适的作业船首向都可以有效降低跨接管穿越飞溅区时的应力响应。因此,刚性垂直连接跨接管安装时将垂直连接器由2腿索具改为4腿索具以及选择适宜的浪向2种措施相结合的方案,跨接管的最大允许作业海况达到了2 m,提高了跨接管的海上安装效率。本研究为刚性跨接管的海上安装提供了参考。
When installing the marine jumper,large environmental load is encountered while running across the splash-zone,which poses strict requirements for the sea conditions during the on-site installation and results in lower installation efficiency.In order to expand the allowable sea condition of installation,a complete installation analysis model including vertical connector is established with OrcaFlex software,and the influences of factors such as support weight,crane height and working radius,the number of vertical connector and wave-current direction on the stress of jumper are studied.The results show that increasing the support weight and reducing the lifting height and working radius of the crane cannot reduce the maximum stress response while running across the splash zone,whereas increasing the number of vertical connector rigging and selecting the proper vessel heading can reduce the stress response.Therefore,the scheme of both changing the vertical connector rigging from 2 legs into 4 legs and selecting the appropriate wave direction is adopted while running across the splash-zone,which achieves a maximum allowable sea conditions of as high as 2 m,thus improving the installation efficiency of marine jumper.This study provides a reference for the offshore installation of a rigid jumper.
作者
孙锟
刘文
杨盛
陈晓东
段立志
SUN Kun;LIU Wen;YANG Sheng;CHEN Xiaodong;DUAN Lizhi(COOEC Subsea Technology Co.,Ltd.,Shenzhen 518067,Guangdong,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2022年第4期234-241,共8页
China Offshore Oil and Gas
关键词
跨接管安装
飞溅区
最大应力
索具数量
撑杆配重
吊机吊高及作业半径
浪向
jumper installation
splash-zone
maximum stress
number of connector rigging
support weight
lifting height and working radius of the crane
wave direction
