虎皮纹现象的产生过程中可以观测到其流场类似于蛇形流动，但是这种蛇 形流动产生的原因暂时还未得到很好的解释，其中一种主流的观点猜测可能是 粘-滑导致的，因为粘-滑会导致流场中出现周期性的滑移现象，我们希望可以探 究这两者之间是否存在联系。 本文研究的主要内容是模拟注塑过程，得到聚丙烯发生粘-滑的剪切速率，以 及剪切速率对粘-滑的时间周期和滑移距离的影响。结果发现随着剪切速率指数 级增加，其粘-滑的时间周期越来越短，滑移距离却越来越长。 本文还研究了模具的内表面（铁原子）的周期性结构和温度对粘-滑的影响， 并通过可视化分析观测到了粘-滑的吸附与解吸附机制，最终得到了粘-滑的时 间周期和滑移距离与表面起伏程度和表面起伏高度的关系。当起伏程度较小时， 粘-滑的时间周期会变长，其滑移的距离也会变长，显然这是存在极限的。当起 伏程度较大时，粘-滑的周期变短，滑移的距离变短。当表面起伏高度越高，其 时间周期变长，滑移的距离越长，但是到达一程度后会达到极限值。当表面起伏 高度越低，其时间周期变短，滑移距离也变短。除此之外，我们发现在高温情况 下，温度的成倍增加并不会对粘-滑周期和滑移距离造成影响。

During the occurrence of the tiger stripe, it can be observed that its flow field is similar to a snake-like flow, but the reason for this snake-like flow has not been well explained . One mainstream viewpoint speculates that it may be caused by stick-slip, because it can lead to periodic slip phenomena in the flow field. We wanted to see if there was a connection between the two. The main focus of this article is to simulate the injection molding process and obtain the shear rate at which polypropylene undergoes slip, as well as the influence of shear rate on the time period and slip distance. The results show that with the exponential increase of shear rate, the stick-slip time period becomes shorter and the slip distance becomes longer. This paper also studied the periodic structure of the inner surface of the mold (iron atoms) and the effect of temperature on stick-slip, and observed the mechanism of stickslip adsorption and desorption through visual analysis.Finally, the relationship between the time period of stick and slip distance and the degree and height of surface fluctuation is obtained. When the fluctuation degree is small, the time period of stick-slip will become longer, and the slip distance will also become longer, obviously there is a limit. When the fluctuation degree is large, the stick-slip period becomes shorter, and the slip distance becomes shorter. When the height of surface fluctuation is higher, its time period becomes longer, and the distance of slip is longer, but it will reach the limit value after reaching a certain degree. When the surface fluctuation degree is lower, its time period is shorter, and the slip distance is shorter. In addition, we find that the doubling of temperature does not affect the stick-slip period and slip distance at high temperatures.