拉格朗日运动方程 lagrange's equation of motion
拉格朗日铃运动方程 lagrange's hydrodynamic equations
拉格朗日行星运动方程 [天] Lagrange's planetary equation
同时，证明了存在膛底边界运动和质量加入条件下的拉格朗日假设是比例膨胀假设的充分条件。
It is proved that the uniform density hypothesis is the sufficiency condition for the proportional expansion hypothesis under the existence of the breech boundary motion and the mass jet.
本文基于拉格朗日动力学方程推导并提出了变运动学模型下动力学模型变换定理。
The kinetic model transformation theorem in the change kinematics model is put forward and deduced based on the Lagranges kinetic equation.
与拉格朗日分析方法比较表明：本文的分析方法对于计算惰性介质质点运动状态具有简单性，而且具有较好的计算精度。
The comparison with the method of usual lagrange analysis shows that the method is convenient and accurate in calculating the histories of particle variabes in inert medium.
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