Volume 3 Issue 1
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Shu-he WEI, Liao-jun ZHANG. 2010: Vibration analysis of hydropower house based on fluid-structure coupling numerical method. Water Science and Engineering, 3(1): 75-84. doi: 10.3882/j.issn.1674-2370.2010.01.008
Citation: Shu-he WEI, Liao-jun ZHANG. 2010: Vibration analysis of hydropower house based on fluid-structure coupling numerical method. Water Science and Engineering, 3(1): 75-84. doi: 10.3882/j.issn.1674-2370.2010.01.008
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Vibration analysis of hydropower house based on fluid-structure coupling numerical method

doi: 10.3882/j.issn.1674-2370.2010.01.008

  • College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P. R. China

Funds:  This work was supported by the National Natural Science Foundation of China (Grant No. 90510017).
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  • Corresponding author: Shu-he WEI
  • Received Date: 2010-04-02
    Abstract
  • By using the shear stress transport (SST) model to predict the effect of random flow motion in a fluid zone, and using the Newmark method to solve the oscillation equations in a solid zone, a coupling model of the powerhouse and its tube water was developed. The effects of fluid-structure interaction are considered through the kinematic and dynamic conditions applied to the fluid-structure interfaces (FSI). Numerical simulation of turbulent flow through the whole flow passage of the powerhouse and concrete structure vibration analysis in the time domain were carried out with the model. Considering the effect of coupling the turbulence and the powerhouse structure, the time history response of both turbulent flows through the whole flow passage and powerhouse structure vibration were generated. Concrete structure vibration analysis shows that the displacement, velocity, and acceleration of the dynamo floor respond dramatically to pressure fluctuations in the flow passage. Furthermore, the spectrum analysis suggests that pressure fluctuation originating from the static and dynamic disturbances of hydraulic turbine blades in the flow passage is one of the most important vibration sources.

     

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