求翻译：为了考察颗粒单元体在各个时刻的位移和速度，对图1所示的模型中选取的3个有代表性的监测点，根据前面的条件和假定建立起离散元模型，经过计算得到这三个监测点在振动荷载下的瞬态速度分布：是什么意思？

In order to investigate the displacement and velocity of particles unit cell in each time, select the model shown in Figure 1, three representative monitoring points, according to the conditions and assumptions of the previous establish a discrete element model, calculated by these three monitoring

In order to study particles in each time unit of the displacement and velocity, which is shown in Figure 1, select the model of the 3 representative of the monitoring sites, and in accordance with the conditions and assume that a discrete element models is calculated from the three monitoring points

In order to inspect the pellet haploid in each time displacement and the speed, 3 to shown in Figure 1 which in the model selects to have the representative test point, establishes a separate Yuan model according to the front condition and the hypothesis, obtains these three test point under vibrati

In order to study displacement and speed of granule cells in each moment, to select the model, as shown in Figure 1 3 representative monitoring point, according to the previous conditions and assumes the establishment of discrete element model, calculated to get the three monitoring stations in the