The vibration sources of power house of hydroelectric power station are complex, and are prone to undesirable vibrations. Among them, the transfer path of hydraulic vibration is an important part of vibration control and operation monitoring. Accurately separating hydraulic vibration sources is crucial to identify the transfer path. To accurately identify the transfer path of the hydraulic vibration source in the structure of the power house of hydroelectric power station, a method combining CEEMDAN-SVD and TE is proposed. The rationality is verified through cross-correlation simulation signals, which are applied to the analysis of the vibration transfer path of the power house of hydroelectric power station. Firstly, based on the vibration test data, CEEMDAN-SVD is used to adaptively perform eigenvector decomposition by the signal energy. Secondly, based on the decomposed vibration signals, the TE (Transfer Entropy) is utilized to identify and analyze the transfer paths of partial vibration source of hydroelectric power station structure. Finally, the applicability of this method to the vibration transfer path of the factory building structure was verified by the quantitative index - information transmission rate. Research shows that the main transfer path of the vibration caused by the vortex rope is as follows: draft tube → undercarriage or stator base → upper floor structure of the power house. The research results are significant for the vibration control and operation monitoring of hydropower station, which provide new ideas for vibration analysis in the engineering field.
Zhi et al. (Sun,) studied this question.