滚动问题中摩擦力的研究

Research of Friction in Rotation Problems

滚动问题是工程力学中常见的问题,摩擦力的研究是其中的重要课题,深刻理解摩擦力的概念、正确判断摩擦力的方向对分析和解决滚动问题至关重要.分别分析了滚动物体在不受外力作用及受外力作用两种情况下,如何判断滑动摩擦力的类型及方向,最后讨论了滚动问题中滑动摩擦力的功.

Rotation problems are common issues in engineering mechanics. In this area, the research of friction is regarded as a major topic. Therefore, it is of great significance to have a deep understanding of its concepts and determine a correct judgment of its directions in regard to the studies of analyzing and solving rotation problems. The paper intends to analyze how to identify the types and directions of sliding friction forces of rolling objects in the cases of impacts with and without external force. Finally the work of sliding friction force is discussed .