文档介绍：Chapter 10: General
Theoretical mechanics
1
第十章刚体的一般运动
2
§10–position of rotations about
two parallel axes
Chapter 10: General motion of a rigid body
3
§10–1 刚体绕平行轴转动的合成
第十章刚体的一般运动
4
Chapter 10: General motion of a rigid body
§10-position of rotations about two parallel axes
Composition problem of rotations about parallel axes is often encountered in mechanical engineering. For instance, the gear wheel in a gear mechanism has plane motion. In previous study, we dealt with a plane motion of a gear by posing it into a translation and a rotation. However, it is more convenient to view the plane motion of a gear as position of two rotations.
Kinematics
5
第十章刚体的一般运动
§10-1 刚体绕平行轴转动的合成
刚体绕平行轴转动的合成问题在机械中经常遇到。例如,行星圆柱齿轮机构,行星轮作平面运动。前面所研究的平面运动是把它看成为平动和转动的合成运动,但是在分析行星轮系的传动问题时,将行星轮的平面运动看成为转动与转动的合成运动则比较方便。
运动学
6
(Look for the animation on the next page)
Take a gear mechanism as an example.
Static system is O1xy
Moving system is O1x'y'
Relative motion: rotation about axis O2,
r is the relative
angular velocity.
Embroiling motion: rotation about axis O1,
e is the embroiling
angular velocity.
Kinematics
7
运动学
静系:O1xy
动系: O1x'y'
相对运动: 绕O2轴转动,
r为相对角速度。
牵连运动: 绕O1轴转动,
e为牵连角速度。
(翻页请看动画)
例如在行星轮系中
8
Kinematics
9
运动学
10