物体受力分析是研究质点动力学问题的关键。
在以上数值模拟中，均采用了光滑质点动力学计算方法。
In the numerical simulations above, the smoothed particle hydrodynamics was applied in sea ice dynamics.
从陈子定理可以推导出质点动力学的基本定理，包括牛顿运动三定律，动能定理，质心运动定理。
It is found that basic dynamic equations can be derived from the Chenzi theorem, including three Newton's laws of motion, kinetic energy theorem, the law of motion of the center of mass.
为了研究重复使用运载器末端能量管理段的下滑轨迹线设计，给出了基于高度和动压的质点动力学的设计方法。
To research the trajectory design method for terminal area energy management(TAEM) of reusable launch vehicle(RLV), the method basing on nonlinear equations of motion is designed.
更进一步探讨运动学，质点动力学，于加速座标系上之运动行为，功，能量，冲量，动量和质点系统与刚体动力学。
Further topics include kinematics, particle dynamics, motion relative to accelerated reference frames, work and energy, impulse and momentum, systems of particles and rigid body dynamics.
物体受力分析是研究质点动力学问题的关键。本文结合剖析六个例题，给出两条检查和判断物体受力分析正确与否的规则。
Force analysis is a key problem in particle dynamics. In this paper, Sir Examples are discussed and criteria are given for the correctness of force analysis.
首先，将基于时间历程的质点动力学方程转化为基于高度剖面的质点动力学方程，同时利用动压代替速度，使轨迹形状直接和动压约束相关。
First, time replaced by altitude and dynamic pressure as the independent variable of nonlinear equations of motion, which make the trajectory shape correlative to dynamic pressure constrains.
此外，通过传统的质点方法和行驶动力学，以缓和曲线长度为例对线路设计参数进行了计算。
In addition, calculations through traditional method such as particle means and driving dynamics for line design parameters are also done.
本文在分析了约束的普遍特性的基础上，讨论了“约束释放原理”在研究非自由质点系统动力学问题中的作用和局限性；
On the basis of analysing the general characteristics of bind this paper discusses the effect and limitation of "release principle of bind" in studying the dynamics of non-free particle system.
根据渤海冰情，在海冰动力学和热力学研究基础上，应用一种质点-网格海冰模式于渤海海域。
Based on dynamic and thermodynamic research of sea ice and the ice conditions in the Bohai sea, a particle-in-cell (PIC) sea ice model has been applied to the Bohai sea, China.
在海冰动力学和热力学的研究基础上，开发应用于渤海的质点-网格海冰模式。
Based on dynamic and thermodynamic research of sea ice, a Particle-In-Cell (PIC) sea ice model has been applied to sea ice forecasting in the Bohai sea.
论述了质点系相对于随质心一起作平动的座标系的动力学规律。
Discusses the dynamic theorem of mass system relative to centre of mass moving in a plane.
单独考虑气动肌肉的质量项并在动力学推导中将其看成沿圆柱体均匀分布的质点系，利用拉格朗日方程建立了气动肌肉质量项动力学模型。
This paper aimed to achieve the dynamics model of mass terms for PMAs. In the modeling, PMAs were considered as a system of particles which were distributed uniformly along a cylinder.
单独考虑气动肌肉的质量项并在动力学推导中将其看成沿圆柱体均匀分布的质点系，利用拉格朗日方程建立了气动肌肉质量项动力学模型。
This paper aimed to achieve the dynamics model of mass terms for PMAs. In the modeling, PMAs were considered as a system of particles which were distributed uniformly along a cylinder.
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