水轮发电机组的随机振动分析

为了研究大型水电机组在复杂水力荷载作用下的振动规律，依据机组随机振动理论，建立了机组随机振动的数值计算模型，用反应谱法对机组轴系的动力响应进行了数值计算和分析，同时，也采用先进的测试技术对大型水电机组进行了随机振动试验研究。计算与试验结果表明：机组振动能量主要集中在基频附近，随机水荷载产生的振动主要是低频振动，对水轮机振动影响明显，而对机组轴系其它部位的振动影响较小。计算结果与试验数据一致，说明理论分析的正确性。

Random Vibrations' Analysis of Hydroelectric Generating Set

In order to study the unit's movement law,in this paper,according to the theory of random vibration,the calculating model is established,and the response spectrum method and advanced testing technology are used in testing and calculation of large hydro-electric generating sets.The results show that the vibration energy is mainly concentrated in the vicinity of the fundamental frequency,and random vibration of the water load is mainly low-frequency vibration,which affects the vibration of the turbine signifi...