大型水电站地下厂房的水力振动数值分析

Numerical Analysis on Hydraulic Vibration of Large-scale Underground Hydropower Powerhouse

在分析当前进行地下厂房水力振动分析构建有限元模型中所存在问题的基础上,以目前国内在建、装机容量最大的溪洛渡水电站地下厂房为例,基于模型试验资料选择典型工况,进行了流道脉动水压力作用下的动力反应时域分析。结果表明,该地下厂房主要部位的位移、速度、加速度和应力振动幅值满足允许限值要求。

Based on the problem analysis in establishing finite element model for dynamic analysis of underground powerhouse at present, the dynamic analysis mode[ for the underground powerhouse of Xiluodu Hydropower Station which is under construction with biggest installed eapaeity in China is developed. Based on model test data, the typical operation modes are chosen to perform dynamic analysis in time domain for the underground powerhouse excited by pressure fluctuation. The results show that the amplitudes of dynamic displacement, velocity, acceleration and stress meet corresponding limits.