摘要
鉴于首次使用一体船浮运安装沉管,船管连接处支墩受力无法直接测量,且尚无相关工程经验可供参考.文章通过支墩受力数值仿真分析,确定沉管浮运期间支墩应力特征点,建立支墩竖向压力和水平压力与特征点应力之间的关系,提出了一种新的测量船管连接的支墩受力方法.研究结果表明,在一体船浮运沉管的过程中,船首支墩竖向压力逐渐上升,船中支墩竖向压力略有下降,船尾支墩竖向压力变化不大;支墩水平压力与航速成正相关,在高速行驶中,支墩水平方向始终受力较大;船舶减速行驶时,支墩主要受惯性力影响,其受力方向发生转向,需要引起重视.
Abstract
In view of the first use of an integrated ship for floating installation of immersed tubes,it is not possible to directly measure the force on the buttress at the ship-pipe connection,and there is no relevant engineering experience for reference.This paper uses numerical simulation analysis of buttress forces to determine stress characteristic points during immersed tubes transportation,establishes a relationship between vertical and horizontal pressures of buttresses and stress at characteristic points,and proposes a new method for measuring forces on ship-pipe connections.The study shows that during the process of using an integrated ship to transport immersed tubes,the vertical pressure on the bow buttresses gradually increases while there is a slight decrease in vertical pressure on mid-ship buttresses;there is little change in vertical pressure on stern buttresses.Horizontal pressure on buttresses is positively correlated with speed;during high-speed travel,there is consistently greater force exerted in the horizontal direction.When decelerating,inertia forces mainly affect the buttresses causing changes in force direction which require attention.
维普
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