It is important to calculate the impedance matrix of foundations in dynamic foundation design and the substructureanalysis of the soil-structure interaction.
动力基础设计以及土-结构动力相互作用子结构分析方法中，确定基础阻抗函数是关键环节。
2
By using multilevel substructureanalysis and finite element displacement method, this system is suitable for various linear static analysis of aeronautical structures.
这一系统采用多级子结构分析技术，可以适应各种类型航空结构的线性静力分析。
3
Substructureanalysis of the materials elucidates the reasons for creep of the materials at room temperature and accounts for the difference between the two tested materials in creep behaviour.