【摘要】 本文通过在任意曲率的细长杆节点和圆孔孔壁之间构造一种虚拟单元——动力间隙元,将任意曲率的细长杆与圆孔孔壁连接起来,使其间的接触碰撞问题转化为平衡方程问题。文中针对石油工程中钻柱这类典型的细长杆与圆形井壁的接触碰撞问题进行了求解。结果表明,动力间隙元能较好地解决细长杆(如钻柱)与圆孔孔壁(如井壁)的接触碰撞问题。更多还原

【Abstract】 By constructing a kind of imaging element - dynamic gap element between the slender rod of arbitrary curvature and the wall of a round hole, which connects the rod and the wall, and make the problem of contact -impact between the bar and the wall be an equilibrium equation problem. As a typical example, the contact-impact problem between the drillstring and the bore hole wall in oil field has been calculated and analysed. The results show that the contact -impact problem between the slender rod and the wall of a round hole, such as the drillstring and the bore hole wall, can be solved better.更多还原