中文摘要：

为了研究《水电站厂房设计规范》中圆筒式机墩动力计算的简化算法对机墩动力特性的影响,本文结合某大型水电站地下厂房,从空间特性、模型范围、荷载加载方式方面探讨其对机墩动力特性的影响。计算结果表明：结构空间特性对机墩动力特性的影响很大;局部结构对机墩动力特性有影响,不同围岩范围下机墩水平向振幅基本为恒值,垂直振幅有变化,当围岩范围取至9倍时,垂直振幅计算结果更准确;径向动荷载不同加载方式对机墩水平向振幅影响较大。

英文摘要：

In order to analyze the effects of simplified cylinder pier dynamic calculation method on the dynamic characteristics of the pier in the design code of the hydropower house,in this paper by taking a large underground powerhouse of hydropower station as an example,the influence of the spatial characteristics,the range of the calculation model and the application methods of dynamic loads on the dynamic characteristics of the pier are discussed.The results indicate that the spatial characteristics of the structure has great influence on the dynamic characteristics of the pier,the local structures could affect the dynamic characteristics of the pier,the horizontal amplitude is constant and the vertical amplitude varies in different surrounding rocks,when the surrounding rock is taken to 9times,the vertical amplitude of the pier is more accurate; the application methods of radial dynamic load have different influence on the horizontal amplitude of the pier.