摘要颗粒带电现象给现实实践带来了不可小觑的影响。在探索外太空的活动中，颗粒的带电会形成电场从而损坏仪器设备；在有机聚合物的制造中，颗粒带电会使小颗粒汇聚成大颗粒，从而影响生产效率；在药物的制造中，颗粒粉末会因为带电而呈现出一些不可预计的危害。所以，研究颗粒带电现象及其机理是有必要而且有价值的。84600

本文基于Apodaca的理论，用球冠面积代替接触应变的方法，建立两球碰撞模型。通过理论计算和实验结果进行对比，最终得到碰撞后带电量和粒径比、带电量和速度的关系。我们还编写了程序计算碰撞过程中小球的运动参数，并且分析了碰撞之后颗粒在均匀电场作用下的运动规律。

毕业论文关键词  颗粒带电  碰撞模型  分析对比  运动规律   

毕业设计说明书外文摘要

Title    The electric model and dynamics simulation of   granular matter in multiple collision         

Abstract The phenomenon of charged particles has brought significant influence to the reality。 In the exploration of outer space activities and charged particles will form an electric field, which could damage equipment; in the manufacture of organic polymer, the charged particles can make small particles coalesce into large particles, thus affecting the production efficiency; in the manufacture of a medicament, the charged particles could show some of the hazards can not be expected。 Therefore, it is necessary and valuable to study the phenomenon and mechanism of particle charging。

In this paper, based on the Apodaca theory, we use spherical corona ' s area instead of contact strain, and develop the establishment of two ball collision model。 By comparing the theoretical calculation with the experimental results, the relationship between the charge quantity and the particle size ratio, the charge quantity and the velocity is obtained。 We also prepared a program to calculate the motion parameters of the ball in the collision process, and analyzed the movement of particles in the uniform electric field after the collision。

Keywords   charged particles    collision model       analysis and comparison    motion law 

目   次

1  引言 1

1。1  研究背景 1

1。2  研究现状 1

1。2。1  同种材料接触起电现象的观察 1

1。2。2  同种材料接触起电的机理研究 2

1。3  本文的研究内容 4

2  两球单次碰撞的研究 5

2。1  两球碰撞模型 5

2。2  两球单次碰撞带电量 7

2。3  两球单次碰撞后在电场下的运动轨迹 8

3  两球多次碰撞的研究 15

4  和实验结果的对比 17

5  未来的展望 22

结  论 23

致  谢 24

参 考 文 献 25

附录A  两小球碰撞过程运动参数计算程序 28

附录B  多次碰撞R1带电量随碰撞次数变化计算程序