井下防喷器实验台瞬态动力冲击仿真研究  

Analysis of Flow Field Simulation of Marine Drilling Single Riser System

作　　者：徐涛[1] 刘清友[2] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《计算机仿真》2015年第8期260-264,共5页Computer Simulation

基　　金：国家科技重大专项(项目编号:2011ZX05050)

摘　　要：新型井下防喷器在室内试验过程中会产生瞬态跃变力,会对配套的实验台形成较大瞬态动力冲击,使实验台的整体受力情况在极短时间内发生剧烈变化,对实验过程的安全性造成隐患。提出结合瞬态动力学理论和有限元仿真软件,在瞬态冲击时间历程载荷步范围内,对实验台所承受的动力冲击进行解算,得到实验台在整个冲击历程中的应力分布规律和选定节点的运动变化规律,仿真结果发现:实验台主框架最大应力值出现在三角筋板与立柱连接处,实验台预定节点加速度变化趋势满足载荷加载趋势,冲击载荷作用于顶梁下表面且瞬间冲击的能量在向顶梁上表面传递过程中有所削弱,并在相应室内试验中对该结果进行验证,为实验台的设计优化和试验过程的安全性提供参考。Downhole BOP produces transition force which forms a large transient dynamic impact for the experi- mental table during the indoor test, this impact makes the whole force of experimental table change dramatically in a very short time, and causes a hidden trouble to the safety of the experimental process. Combining the theory of transi- ent dynamics and finite element simulation software, we solved the dynamic impact of experimental table in the process of the transient impact time load step, obtained the stress distribution of experimental table, and changed rule of the selected node movement component in the whole impact process. The simulation results show that the maximum stress appears in the joint of triangle stiffened plate and column of the experimental table main frame, the acceleration trend of the experimental table predetermined node meets the load loading trend, the impact load loading at the soffit of the top beam and instant impact energy is weakened to upper surface of the top beam during the transfer, and com- pletes the laboratory tests to verify the corresponding results, which provides a reference for the optimization design and security of test procedures such this experiment table.

关 键 词：瞬态 动力冲击 井下防喷器 实验台 仿真 

分 类 号：TH133[机械工程—机械制造及自动化]