解大型对称非正定有限元方程组的一些技巧

解大型对称非正定有限元方程组的一些技巧 SOME TECHNIQUE TO SOLVE LARGE SYMMETRIC BUT NONPOSITIVE DEFINITE EQUATIONS 叶碧泉 Ye Biquan first-author 为求解基于混合变分原理而导出的对称非正定有限元方程组,本文提出了一个利用附加存贮区的分段、分片直接解法,它同LDLT分解法一样不受内存容量的限制。这个方法对在中、小型计算机上求解大型结构、特别是多叉式结构尤为适用。 To Solve symmetric but nonpositive definite linear equations, We presente a elimination method which is Galled Segment by Segment and piece by piece elimination method, It isn’t limeted by Capacity of Computer as LDL T method. This method is more Sultable to stress analysis for one kind of large Structures with many branches. 1985-02-01 2021-04-01 2