有限元法中总刚动态存取及其应用  

A dynamic memory allocation method for global stiffness matrix in FEM and its application to geotechnical engineering

作　　者：李树忱[1] 程玉民[1] 李术才[2] 

机构地区：[1]上海大学上海市应用数学和力学研究所,上海200072 [2]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《岩土力学》2004年第4期646-650,共5页Rock and Soil Mechanics

摘　　要：讨论了如何利用FORTRAN 90中指针和派生类型相结合构成的链表结构的方法对总刚实现动态存取、增强总刚的灵活性,从而克服了以往总刚形成和存储的一些缺点。方法不仅能方便地实现总刚矩阵内任意位置上数据的插入和删除而不影响其它数组结构的变化,而且比一般半带宽存储节约更多内存。方法特别适合岩土工程开挖与支护等大型结构的三维有限元分析,能大大提高求解效率。By use of concepts of pointer and derived type in FORTRAN90, a linked list which carried out a dynamic memory allocation for global stiffness matrix and enforced its flexibility is made. Consequently, it avoids lots of shortcomings in the array memory and the old method of forming the global stiffness matrix. This method can be very easy in data processing of the global stiffness matrix such as insert, delete etc. and be invariability in the structure of the array. At the same time the method can save more EMS memory than the common half-band memory. So the method is especially suitable to analyzing the extraction and support with the geotechnical engineering in the 3-D FEM and can enormously reduce times of solving equations.

关 键 词：指针 链表 有限元法 总刚 动态存取 

分 类 号：TU457[建筑科学—岩土工程]