一种改进的有限元子结构并行算法

A New Parallel Algorithm of Finite Element Substructure Method

本文提出了一种新的有限元子结构并行算法。该方法在分析多层建筑、塔等狭长结构中,利用一种新的结点编号,克服了原方法占用大量内存的缺点,即利用多个CPU同时进行一种新的静凝聚,再利用求得的子结构界面位移同时进行回代和求应力。该方法在西安交通大学ELXSI-6400并行计算机上程序实现,表明除能够大幅度节省时间以外,还能有效地节省内存,是一种有效的大型结构的分析方法。

A new parallel algorithm of finite element substrcture method has been presented in this paper.Using this effective method to analyze the long and narrow structures such as multi-storied buildings and towers, a new numbering method for points is used to overcome the difficulty of large memory space the original method needs. This means that many CPUs carry out a kind of new static condensations simultaneously, and the backward substitutions are concurrently made to get internal point displacements and stresses.The program of this method has been realized on ELXSI-6400 computer of Xi'an Jiaotong University.The computation results show that the computational time and memory space can be saved effectively .This method is an effective method for analyzing large-scale structures.