Release Time:2022-09-14  Hits:

Indexed by: Journal Article

Date of Publication: 2022-06-29

Journal: 水力发电学报

Institution: 建设工程学部

Volume: 28

Issue: 5

Page Number: 195-199,91

ISSN: 1003-1243

Abstract: The dynamic design becomes a key technique for the construction and operation of powerhouse structures in China, along with the fast development of large pumped-storage projects. In comparison with a general turbine, hydraulically-excited vibration is quite remarkable, as the working head and running speed of the pumped-storage turbines are much higher. This paper describes the model test results of turbine vibration for the Yixing Pumped-storage Project, and discusses the similarity law and the structures of pressure fluctuations in the spiral case and draft tube, and then, presents a three-dimensional FEM simulation of the dynamic responses under hydraulic excitation, including displacement, velocity, acceleration and stresses. Finally, a vibration evaluation is made according to the criteria of powerhouse structure vibration.

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