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。
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.
出处
《地震工程与工程振动》
CSCD
北大核心
1996年第1期79-86,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家"八五"攻关项目<水平井钻井技术>
关键词
细长杆
接触碰撞
动力间隙元
圆孔
孔壁
采油井
Dynamic gap element, Slender rod, Contact -impact, finite element,drillstring
