我们还会听到一些天文学的名词：如黄赤交角和小行星动力学等等。
We hear about astronomy too: the obliquity of the ecliptic and the dynamics of asteroids.
为了建立高速水稻插秧机椭圆齿轮行星系分插机构的动力学模型，必须分析推秧装置对该机构的作用。
In order to set up the dynamics model of the transplanting mechanism with planetary elliptic gears of high-speed rice transplanter, the effect of seedling-pushing device on it must be analyzed.
行星地球自转动力学主要有两方面研究内容：自转变化和在自转条件下内部流体物质运动。
There are two main research fields in the rotation dynamics of the planet Earth: rotation variation and the fluid motion effected by rotation.
系统地给出了杠杆模拟法的理论和应用方法，并将该方法推广成为行星式变速器动力学分析的通用方法。
The theory and solution of the lever analogy are systematically given, and the method is generalized to become a common one of dynamic analysis for planetary transmission.
建立了单级2k - H直齿行星传动的纯扭转集中参数动力学模型。
A simplified purely torsional concentrated parameter model of a single stage 2k-h spur planetary gear transmission (PGT) is developed.
为了获得行星式球磨机中重钙的湿法超细粉碎动力学模型，用BS模型研究了重钙的湿法超细粉碎过程。
In order to obtain the kinetic model of wet grinding powdered whiting in the planetary ball mill, the process of wet superfine grinding of powdered whiting was studied by the BS model.
基于百万亿次超级计算机深腾7000，对行星流体动力学数值模拟程序的性能优化进行了研究。
The performance optimization of planetary fluid dynamics numerical simulation program on thousands cores is investigated by the experiments on 100TFlops-scale supercomputer, DeepComp 7000.
本文建立了时变啮合刚度的直齿行星齿轮动力学模型。
This paper presented a lumped-parameter model for planetary gears, including mesh stiffness variation.
该模型在纯扭转模型的基础上，进一步计入了行星轮轴心沿系杆切向的位移与行星轮轴的轴承支承刚度对系统动力学性能的影响。
Compared with the purely torsional model, tangential displacements and bearing stiffness of the pinions are included in the governing equation of motion.
该模型在纯扭转模型的基础上，进一步计入了行星轮轴心沿系杆切向的位移与行星轮轴的轴承支承刚度对系统动力学性能的影响。
Compared with the purely torsional model, tangential displacements and bearing stiffness of the pinions are included in the governing equation of motion.
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