By Differential Quadrature Method (DQM), the transverse vibration and stability of the rotating circular plate and the eccentric rotating circular plate are studied in this paper.
本文用微分求积法对旋转圆板以及偏心旋转圆板的横向振动和稳定性进行了分析。
By taking advantage of rotating centrifugal force and the supporting effect of eccentric short drill collar, we cut off the axis inclination of bit, and avoid well inclination.
利用偏心钻具在旋转过程中的离心力和偏心短钻铤的偏重带的支撑作用，减小了钻头轴线倾角，从而减少了井斜。
It USES the two eccentric synchronous rotating runners to drive the paddle to enhance ship thrusting efficiency, has simple structure and can make the ship run on a shallow waterway.
本发明利用偏心同步旋转的两个转轮带动桨叶运动来提高船舶的推进效率，结构简单，且能使船在浅水航道中行驶。
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