Substation is a special kind of industrial architecture, because electric equipments in the main structure have so many characteristics such as complex form, large weight and various sitting styles etc. There is a very complicated dynamic interaction between the electrical equipments and the main structure. In this paper, the types of substations are classified. Both the 3-D calculation models involving interaction of structure-electrical equipments and the model of electrical equipments themselves are established. The traditional structure models without interaction of structure-electrical e-quipments are also set up for comparison. The dynamic characteristics of main structure, electrical equipments and their interaction are received by modal analysis. The results can provide some "valuable reference in seismic design and earthquake response analysis of the similar substations.%变电站主厂房是一种特殊的工业建筑,由于其中的电气设备形式复杂,质量较大,摆放形式多样,因此主厂房与设备之间存在着非常复杂的动力相互作用.对我国通用的户内式变电站主厂房进行较全面的动力特性研究,建立了考虑设备-结构相互作用的变电站主厂房有限元计算模型以及电气设备计算模型,通过详细的模态分析,找出了主厂房结构及电气设备的动力特性,以及考虑二者相互作用后变电站系统的动力特性变化,其结果可以为同类变电站进行地震反应分析提供依据.
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