The law of the variable mass flow in the horizontal wellbore is useful for the horizontal well output prediction, and optimal design and dynamic analysis on oil well production system.
水平井井筒变质量流的流动规律是进行水平井产能预测、油井生产系统优化设计及动态分析的基础。
The kinetic energy theorem of mass variable system is derived from the kinetic equation of mass variable body. The practical value of it is pointed out using an example.
从变质量物体的动力学方程出发，推导出变质量系统的动能定理。指明其实用价值，并举例加以说明。
The effect of stiffness constant, viscosity damper coefficient and variable mass on the damped frequency and the relative damping ratio of the system were studied.
研究了系统刚度、粘性阻尼系数尤其是变质量等参数对系统固有频率和阻尼比的影响。
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