relative moment

The relative sliding ratio formulas of an involute spur gear pair are developed The influences of relative sliding ratio on the gear wear, friction moment of engagement and elastohydrodynamic lubrication are analyzed

推导了渐开线圆柱齿轮副相对滑动率的计算公式，分析了相对滑动率对齿轮磨损、相啮合的摩擦力矩与弹流润滑等问题的影响

The relative positions of the action point of earth pressure on the wall were calculated after having found the dimension of active earth pressure and passive earth pressure, using the moment equilibrium of the sliding mass.

在确定了主动土压力和被动土压力的大小后，利用滑动体静力平衡的力矩平衡方程计算力的作用点在墙体的相对位置。

On the Theorem of Moment of Momentum of Relative Instantaneous Centre

关于相对瞬心的动量矩定理的若干问题

Practical examples are used to illustrate the application of the instantaneous acceleration center in dynamics. The solutions to certain problems are greatly simplified by combining the instantaneous acceleration center with the theorem of moment of momentum of relative motion.

以实例说明加速度瞬心在运动学中的应用，加速度瞬心与相对运动动量矩定理结合在动力学中的应用，一些问题求解大为简化。

Theorem of the Moment of Momentum of Particles Relative to an Arbitrary Point

质点系相对于任意点的动量矩定理