运用变质量系统的基本原理，建立轴流脱粒过程中谷物运动的非线性动力学模型。
Based on the principle of a varied mass system, the non linear mathematical model of the crop mechanics for an axial threshing process was set up.
研究了一种变质量柔绳上升和下降的运动规律。
以矿井提升装载过程中的箕斗和钢丝绳为研究对象，建立了变质量箕斗的运动微分方程及钢丝绳的纵向振动微分方程。
Aiming at wire rope and skip in loading, movement differential equations of skip with different mass and longitudinal vibration differential equations of wire rope were proposed.
其中某些方程可用于研究变质量非完整系的相对运动动力学。
Some of the equations can be used to investigate the dynamics of relative motion of non-holonomic system with variable mass.
首先建立了弹性支承变质量转子系统的力学模型和运动微分方程；
First of all, the mathematical model of the flexibly supported rotor with wriable mass is built up.
本文以一个载满沙子的圆锥表漏斗作为单摆，研究沙子漏出过程的运动周期，从而给出此时变质量单摆的周期变化规律。
This paper studies a cone with leaking as a pendulum and the period of its sand leaking movement and gives out the period changing rule of the variable mass pendulum.
在气垫导轨上研究了变质量物体在变力作用下的运动规律。
The motion of variable mass system under variable force is studied using air track.
运用变质量系统的基本原理，建立轴流脱粒空间内谷物运动的非线性力学模型。
Based on the principle of the varied mass system, the no-linear mathematical model of the crop mechanics in the axial threshing space has been set up.
应用这些定理得到变质量高阶非完整系统的若干新型运动微分方程。
Using the theorems, the new equations of higher order non-holonomic mechanical systems with variable mass are obtained.
应用这些定理得到变质量高阶非完整系统的若干新型运动微分方程。
Using the theorems, the new equations of higher order non-holonomic mechanical systems with variable mass are obtained.
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