浮托安装进船过程中护舷碰撞力实测研究  

Field measurement of collision force by fenders at the docking stage of float-over installation

作　　者：葛洪亮[1] 李欣[1] 杨建民[1] 田新亮[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《海洋工程》2016年第3期19-27,共9页The Ocean Engineering

基　　金：工信部<浮式液化天然气储存及再气化装置(LNG-FSRU)总体设计关键技术研究>资助项目

摘　　要：浮托安装法广泛应用于大型组块海上安装。导管架平台上部组块浮托安装进船过程中,风、浪、流引起的浮托驳船横向运动造成浮托驳船与导管架桩腿的碰撞,碰撞力可能会对导管架结构造成损伤。陆丰7-2上部组块浮托安装中,为了监测碰撞力大小,设计了碰撞力海上监测系统。通过在导管架外侧四个桩腿上安装光纤光栅应变传感器对碰撞过程中导管架桩腿进行应力监测,进而计算碰撞力。对碰撞过程,载荷作用位置、方向进行简化,并对载荷大小及垂向作用位置对计算的影响进行了研究。结构分析模型简化后,测点von-Mises应力与碰撞力大小成正比,对导管架整体结构建模计算并取局部结构计算比例系数,结合应力实测数据计算出进船过程中驳船对导管架桩腿碰撞力。Float-over installation method is widely used in large topside installation at sea. The transverse motion of the barge caused by wind,wave and current can lead to collisions between barge sides and jacket legs at the docking stage of float-over installation which may damage the jacket structure. In Lufeng7-2 topside float-over installation,a collision force monitoring system on the sea was designed to monitor the force. Stress response of the jacket legs was monitored by mounting fiber grating strain sensors on the jacket＇s legs in order to calculate the collision force. The collision processes,locations and directions of loads were simplified. Influences of magnitude of loads and their vertical positions were also studied. When the structural analysis model was simplified,von-Mises stress of gauging points was proportional to the collision force. The proportionality coefficients were calculated by modeling and computing the whole jacket structure and then modeling and computing the local structures of the jacket. Based on the stress data by field measurement,the collision force acting on the jacket＇s outer four legs was calculated.

关 键 词：浮托安装 导管架桩腿 碰撞力 应力监测 实测 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]