基于ABAQUS串列立管碰撞的有限元分析

发布时间：2018-02-09 20:10

  本文关键词： 海洋立管 碰撞 重启动分析 水耦合 有限元分析　出处：《振动与冲击》2017年06期 　论文类型：期刊论文

【摘要】：以两串列立管碰撞为研究对象,运用有限元分析软件ABAQUS,考虑水耦合作用研究串列立管的局部碰撞行为。通过模拟立管碰撞前的静态弯曲和动态碰撞过程,将静态分析的结果导入动态分析步中,从单一因素方面分析碰撞速度、立管夹角、内压对立管碰撞应力的影响,并将考虑水耦合作用和不考虑水耦合作用的应力变化情况进行了对比分析。结果表明:在给定工况下,两立管发生多次碰撞,考虑水耦合作用时,立管碰撞产生的应力较小。在分别考虑和不考虑水耦合时,碰撞速度、夹角、内压对立管应力变化的影响是不同的,初始碰撞产生的应力随碰撞速度的增大而增大,存在某一适当的夹角和内压值,使立管较为安全,可以避免立管遭受撞击而发生破坏,为立管群的排列布置提供参考。
[Abstract]:The local collision behavior of tandem risers is studied by means of finite element analysis software Abaqus, considering the water coupling effect. The static bending and dynamic collision process of risers before collision are simulated by using the finite element analysis software Abaqus. The results of static analysis are introduced into the dynamic analysis step, and the impact of collision velocity, angle of riser and internal pressure on the impact stress of the tube is analyzed from a single factor. The stress changes considering water coupling and not considering water coupling are compared and analyzed. The results show that the two risers collide several times under a given working condition, and consider the water coupling effect. The effect of impact velocity, angle and internal pressure on the stress variation of riser is different when water coupling is taken into account, and the stress produced by initial collision increases with the increase of collision velocity. Due to the existence of an appropriate angle and internal pressure, the riser is safe and can avoid the damage caused by impact, which provides a reference for the arrangement and arrangement of the standpipe group.
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