有限元法是近十多年迅速发展起来的较为有效的数值计算方法。有限元法的基本思想在四十年代就已经提出来了,但直到五十年代后、中期,在生产实践的直接推动下,才得到发展。高速电子计算机的出现,为其广泛应用提供了必要的物质基础。有限元法的实质是,将无限多个单元相连接的弹性连续体理想化为足够多的有限个节点相连接的有限元的集合 Finite element method is a more effective numerical method developed rapidly in recent ten years. The basic idea of ​​the finite element method was put forward in the 1940s, but it did not develop until after the mid-1950s, mid-period, and under the direct promotion of production practices. The advent of high-speed electronic computers has provided the necessary material basis for its wide application. The essence of the finite element method is that the elastic continuum connecting an infinite number of units is idealized as a sufficient number of finite element sets connected by a finite number of nodes