摘要
管道内旋转细长梁是石油钻采工程中的特有结构,旋转细长梁不仅与管道内壁产生随机多向碰撞,还与细长梁内外管道和环空流体耦合,是一个复杂的非线性固液耦合系统,迄今还未见该方面的研究文献。该文考虑管道内旋转细长梁的结构和工作状态,将结构动力学方程、流体连续方程和动量方程耦合,推导了界面力和界面位移的计算公式、迭代格式及收敛准则,建立了管道内旋转细长梁固液耦合动力学分析的三维数值模型和计算方法。算例表明:该方法能够描述管道内旋转细长梁的动力学行为,揭示了管道和环空流体与旋转细长梁的耦合效果,具有较高的计算精度和效率,数值计算与实验结果吻合较好。为进一步研究石油钻采管柱的固液耦合动力学提供了可行的计算模型和研究方法。
A rotary slender beam in a pipe is a special structure in oil engineering.It not only produces random multi-directional collisions with the pipe＇s inner wall,also couples with the inner and outer annular fluids.This results in a complex system of nonlinear fluid-structure interaction.Up till now,no research literature concerning this aspect is available.In the paper,in terms of the structure and mode of operation about a rotary slender beam in a pipe,equations of the structure dynamics,the fluid equation of continuity and momentum equation have been coupled.Thus the calculation formulas about the interface force and displacement,the congruent iterative format and convergence criterion have been derived.A three-dimensional numerical model and a computational method have been established for the dynamic analysis of the fluid-structure interaction of the rotary slender beam in the pipe.The numerical example shows that the proposed method is capable of describing the dynamic behavior of the fluid–structure interaction,and reveals the effect of the fluid–structure interaction of the rotary slender beam in a pipe with higher computational accuracy and efficiency.And the numerical results match well with those obtained by experiments.The present methodology provides a feasible computation model and research approach for the fluid–structure interaction of the string in oil drilling and production engineering.
出处
《工程力学》
EI
CSCD
北大核心
2011年第4期251-256,共6页
Engineering Mechanics
基金
国家自然科学基金项目(10672037)
关键词
流固耦合
数值计算
动力学
旋转细长梁
环空流体
fluid-structure interaction
numerical calculation
dynamics
rotary slender beam
annular fluid
