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本刊在82年第6期、83年第1、3、4期都刊登了有关主轴回转轴线定义的讨论文章,读后颇有启发,愿在此发表一些个人看法,请读者批评指正。众所周知,在理论力学中研究刚体的平面运动有两种方法。一种是求出每一瞬间速度为零的点,称为瞬时中心,刚体在该瞬间围绕该点回转,即瞬时中心法。另一种是以刚体上某一点作为基点,刚体的运动可看作为绕基点的转动加上基点本身的平面运动(称为牵连运动)
Articles published in the 6th of August, 1983, 1, 3, 4 have published on the spindle axis of rotation of the definition of the article, inspired quite after reading, would like to express some personal views on this, the reader criticism. It is well known that there are two ways to study the planar motion of a rigid body in theoretical mechanics. One is to find the speed of each moment is zero point, called the instantaneous center, rigid body around the point in the moment of rotation, that is, instantaneous center method. The other is based on a point on the rigid body as the base point, the body of the movement can be seen as the rotation around the base point plus the base point of its own plane movement (referred to as implicated movement)