中文摘要：

采用有限元数值方法研究软弱地基及机组动荷载施加方式对水电站厂房结构动力分析的影响。详细分析机组动荷载的成分、幅值及对应的频率等因素对计算结果的影响。结果表明,当基岩与厂房结构的刚度相差比较大时应重视软弱地基边界条件带来的影响,机组动荷载按分频施加更加符合实际情况,厂房机墩各向振动存在较强的相互耦合关系。

英文摘要：

Influences of soft foundation on the dynamic response of hydropower house and methods of dynamic loads application are investigated using FEM simulation, focusing on a detailed analysis of the composition, amplitude and frequency of dynamic loads on the generator units. Results show that more attention must be paid to the impact of foundation boundary conditions in the case of a significant difference in stiffness between the house structure and its foundation. And the simulated vibrations are closer to the real cases if the loads are applied according to frequency differences. Coupling effects between generator pier vibrations in different directions have been observed.