纯滚动问题中摩擦力方向判断的一种方法  

A Method of Deciding the Direction of Static Friction under Pure Rolling

作　　者：陈伟[1] 李少华[2] 王璟 CHEN Wei;LI Shao-hua;WANG Jing(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212003,China;College of Science,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003 [2]西安科技大学理学院,陕西西安710054

出　　处：《教育教学论坛》2020年第36期274-276,共3页Education And Teaching Forum

摘　　要：把刚体的平面运动分解为随质心的平移和绕质心的转动两部分叠加,然后通过假设接触面光滑,得到接触点的相对运动趋势,进而得到均质圆轮在纯滚动时的多种情况的摩擦力方向,为具体求解摩擦问题,快速判断静摩擦力方向提供依据。The plane motion of the rigid body can be decomposed into two parts:the translation of the center of mass and the rotation around the center of mass.Then the relative motion trend of the contact point can be obtained by assuming that the contact surface is smooth.Then the friction direction of homogeneous round wheel in pure rolling is obtained.This provides a basis for quickly judging the direction of static friction when solving friction problems.

关 键 词：圆轮 纯滚动 静摩擦力方向 

分 类 号：O313.3[理学—一般力学与力学基础]