在矩阵位移法中，单元分析的任务是建立单元刚度方程，形成单元刚度矩阵；整体分析的主要任务是将单元集合成整体，由单元刚度矩阵按照刚度集成规则形成整体刚度矩阵，建立整体结构的位移法基本方程，从而求出解答。
虚单元不计算单元刚度矩阵，不参与形成总体刚度矩阵。
Void element can "t be calculated by firm matrix of element, and can" t be formed to total firm matrix.
本文的计算软件采用动态链表数据结构存贮总体刚度矩阵，具有很高的存贮和计算效率。
The solver of this software uses the linked list data structure to store the global stiffness matrix, which is efficient in storage and calculation.
在结构损伤的早期阶段，损伤往往集中发生在少数单元，损伤前后总体刚度矩阵差的秩较小。
Damage tends to be concentrated in a few structural members at the early stage, so the stiffness perturbation matrix tend to be in small rank.
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