通过摄像法得出了旋涡表面流体质点的运动轨迹、切向和轴向时均速度。
Moving path lines, tangential and axial average velocities of particles at the vortex surface are obtained by the photography method.
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.
在跟踪金属质点位移轨迹的基础上，揭示了毛坯变形区各质点贴模位移与应变间的关系，从而明确提出了圆锥形件的成形机理。
The relation between the displacement of closing up to punch and strain for each metal particle in deformation region had shown by following the deformation trace of particle.
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.
空间机构上许多质点的运动轨迹可能具有双重曲率。
A spatial mechanism may have particles with loci of double curvature.
由质点运动连续性公理导得力的连续性定理及关于质点运动轨迹的三个定理。
We can derive one theorem of the continuity of a force and three theorems about the trajectory of a particle with the particle-motion-continuity axiom.
运用质心运动定理，分析了质点在可自由移动的凹曲面上滑下时，质点对惯性系的运动轨迹方程。
The possible tracks of a particle BXm_(2), sliding down along a free movable concave surface with the mass m_(1) are analyzed.
运用质心运动定理，分析了质点在可自由移动的凹曲面上滑下时，质点对惯性系的运动轨迹方程。
The possible tracks of a particle BXm_(2), sliding down along a free movable concave surface with the mass m_(1) are analyzed.
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