Furthermore, it builds up a model of multi-periodical green function by combining Shanks transformation and Ewald transformation. And proposes a new method to deal with finite thickness perforating conducting wall periodically effectively. 进而通过建模研究了一种将Shanks和Ewald变换相结合的多层周期格林函数加速的技术,并提出了一种有效处理有限厚度周期穿孔导电壁的新方法。