关于“对《理论力学教程》中两个问题的讨论”的讨论

COMMENT ON "DISCUSSION OF TWO PROBLEMS IN 'THEORETICAL MECHANICS TUTORIAL'"

文献[2]指出《理论力学教程》中的"一张错误的插图",给出了所谓"正确"的插图,并修改了《理论力学教程》的公式(3.7.3),该文认为在研究刚体的平面平行运动的§3.7节不用选择转动参照系,宜采用平动参照系.本文作者认为《理论力学教程》的插图3.7.2并没有错,在§3.7节采用转动参照系是研究刚体平面平行运动转动瞬心等问题的需要;公式(3.7.3)也不必作根本上的修改,但对其中坐标分量(x′,y′)的含义要加注释,以免造成混淆.

Reference [2] pointed out ＂an error illustration＂ in the book named ＂theoretical mechanics tutorial＂,gave an ＂correct＂ illustration,and modified the equation（3.7.3） in that book.It is considered that study of the plane parallel motion of rigid body in §3.7 section should use translational reference rather than rotating reference.In this paper,we think there is nothing wrong in the illustration 3.7.2.Using rotating reference in §3.7 section is the needs of the instantaneous rotation center problems of the plane parallel motion of rigid body.Equation（3.7.3） also doesn＇t have to be modified,but the coordinate components should be noted in order to avoid confusion.