Dynamic Resonance Analysis Of Hydropower House

As a prominent problem, hydraulic resonance in hydropower house not only affects the reliability of generator unit, but also arouses violence vibration of powerhouse structure. This resonance usually exceeds serviceability limit state and ultimate limit state; endanger hydropower station's economic operation, even safe operation.In recent years, more and more attention is paid to the vibration of units and mill construction. Abnormal vibrations, of units and mill construction may cause the equipments in hydroplant inefficient, create fatigue in components of units, consequently, affect safe and stable operation of units, and the benefit of the hydroplant is also influenced. Meanwhile, the abnormal vibration and the huge noise may make the workers discomfort, long-term exposing to the vibration and noise can bring bad effect on body and mind of the workers. Therefore, careful study on the vibration that may appear should be made, and the measures to control and prevent vibrations need to be adopted. In this paper, aiming at Wanjiazhai hydropower station at dam toe, study on the dynamic characteristics of supporting composite construction and other relevant problems with three dimensional finite element method.The modal analysis, dynamic response analysis and allowable vibrationvalue for hydropower house proposed by author compose an system to calculate and analyze the vibration of hydropower house, andreinforcethe current design code for hydropower house.