质点运动

Based on numerical calculation, ground movement of underground explosions are analyzed quantatively showing that the maximum velocity of ground particles is subjected to exponential decay laws.

以数值计算为基础，定量分析地下爆炸的地表运动，得到地表最大质点速度的指数衰减规律。

Taking generalized coordinates for variables, the differential equations of multiple elastic particles are decomposed into the differential equations in the independent form by introducing generalized coordinates .

通过广义坐标的引入，将多质点弹性体系的运动微分方程分解成以广义坐标为变量的独立微分方程形式。

The relation between Lagrange multiplier of impact and impact force was obtained on the basis of theorem of motion of mass center.

在子结构离散的柔性多体系统的动力学基础上，由质点系统的质心运动定理建立了与接触碰撞有关约束的Lagrange乘子和撞击力的关系。

The general expression of the moment of momentum of particles relative to an arbitrary point is discussed including application of the theorem of the plane movement in rigid body .

讨论了质点系相对于任意点的动量矩定理的一般表达式及该定理在刚体平面运动中的应用。

Up to now, we have been concerned only with the motion of particles.

到目前为止，我们只关心质点的运动。

A method of phase plane is used to investigate the movement of the spherical rolling robot before jumping and its jumping condition is developed.

然后利用相平面法对球形机器人弹跳前的运动进行了分析，得到了起跳条件；利用质点系的达朗伯原理得到了球形机器人弹跳后的动力学模型。

Therefore the disturbance of the phase velocity or meander amplitude could make the motion of the fluid particles chaotic.

弯曲急流的相速，振幅发生周期扰动均可使流体质点的运动出现混沌特性。

The PZT plates were polarized in thickness direction. By using the deformation in the plane perpendicular to the direction of polarization, the rotation around Z axis was generated when the torsional vibration around Z axis mode was excited. And the rotation around X axis or Y axis was generated by combining the longitudinal vibration mode and the bending vibtration mode.

利用压电陶瓷在垂直极化方向平面内的变形，激励定子绕Z轴的扭转振动模态，实现转子绕Z轴的转动；激励在定子中固有频率接近、振动方向相垂直的伸缩振动模态和弯曲振动模态，并通过振动的叠加使定子末端质点产生绕X轴或者Y轴的椭圆运动，实现转子绕水平轴的转动。

The model of launch vehicle is rigidˉbody motion equati on. The model of stabilizing parachute is mass point motion equation.

其中运载火箭的数学模型是刚体运动模型，稳定伞的模型是质点模型，而伞绳的模型是弹簧阻尼系统模型。

It encapsulates the data that describes a basic vehicle with point mass.

他封装了一些可以用来描述质点物体运动的数据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。