中文摘要：

通过建立小湾水电站地下厂房三维有限元模型，对厂房模型的振动分析进行数值模拟，研究了厂房固有振动特性、共振复核及机墩结构在各种动力荷载作用下的振幅和应力，利用谱分析方法对模型进行了抗震分析，考察了正常运行时机组振动荷栽和地震联合作用下厂房主要构件的地震反应特性，对厂房的抗震安全性能进行了初步的评价，为小湾厂房动力设计和运行控制提供科学依据。

英文摘要：

Establishing three-dimensional finite element model of XiaoWan underground powerhouse, numerical simulation for vibration analysis of powerhouse model is used to study vibration characteristic, resonance check of the powerhouse and the vibration amplitudes and stresses of the pier structure under various dynamic loads. Spectrum analysis is also applied to analyze underground powerhouse anti-seismic characteristic. Unit＇s vibration load under normal operation and earthquake response characteristic of powerhouse main parts under jointly earthquake action are investigated and the anti-seismic safety property of powerhouse is evaluated. It provides scientific basis for Xiaowan powerhouse dynamic design and operation control.