基于APDL语言的定向钻管道回拖力学性能仿真分析

The Simulation and Analysis about Mechanical Properties of Pipeline Back-dragging in Directional Drilling Based on APDL

简述了APDL语言的参数化特点,介绍了ANSYS在定向钻仿真中的优势:计算机仿真可以克服场地、经费不足、参数繁多、时间跨度等方面的困难。采用ANSYS并结合APDL语言对定向钻的管道回拖过程进行仿真,对回拖管道的应力和变形以及回拖力进行了分析,得出了管道应力沿中性轴径向对称分布,且距离中性轴越远值越大的规律。给出了不同穿越曲率半径下管道力学性能的变化规律:随着穿越半径的增大,回拖力逐渐变大,接触压力逐渐变小,并且二者变化规律可用高阶多项式描述。

This paper makes a brief introduction of the parametric language of APDL and the advantage of ANSYS in simula- tions of directional drilling. Computer simulation can overcome many difficulties such as the lack of ground and money, too many parameters, and time span when simulating the pipeline back-dragging in directional drilling with ANSYS and APDL. It analyses the stress and strain of back-dragging pipeline and the dragging force and thus presents a knowledge of the fact that the stress of pipeline is symmetrically distributed radially along the neutral axis and that the farther it is from the neutral axis, the larger stress there will be. It lists the change of the properties of pipeline back-dragging aligned at different crossing curvature radii With the increase of the crossing curvature radius, the dragging force is gradually bigger, but the contact stress becomes smaller, and the change can be described as high degree polynomial.