机械阻抗方法的一个重要特点是,在进行结构系统动力分析时,可以将系统分为若干部件(或主系统与子系统)。分别由理论计算或测试识别的方法求出部件的动力特性后,按一定边界条件求出系统动力学方程,并解得组合结构系统的动力特性或动力响应。这就是组合结构系统分析法。本讲第一部分介绍组合结构系统动力特性分析的动刚度法。先从最简单的单座标交联情 An important feature of the mechanical impedance method is that the system can be divided into several components (or main systems and subsystems) in the dynamic analysis of structural systems. After calculating the dynamic characteristics of the components by theoretical calculation or testing and identification respectively, the system dynamic equations are obtained according to certain boundary conditions and the dynamic characteristics or dynamic response of the composite structural system are solved. This is the composite structure of the system analysis. The first part of this lecture introduces the dynamic stiffness method for the analysis of dynamic characteristics of a composite structural system. First from the simplest single cross-linked sex