Stability Analysis of the Overhang Steel Liner of Circumfluence Hole in Surge Chamber of Jinping II Hydropower Station

Gui Sheng Xu; Jian Qiang Guo; Xin Xin Li

doi:10.4028/www.scientific.net/AMM.405-408.3275

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 405-408Stability Analysis of the Overhang Steel Liner of...

Stability Analysis of the Overhang Steel Liner of Circumfluence Hole in Surge Chamber of Jinping II Hydropower Station

Abstract:

The overhang steel liner is designed for the asymmetry circumfluence hole in the differential surge chamber of Jinping II hydropower station, which is subjected to high hydrodynamic loads resulting from hydraulic transient processes. The maximum external water pressure on the overhang steel liner is about 40-50m head larger than the internal water pressure. Thus its thickness depends on the compressive resistance stability, which is studied in this paper by both the finite element method (ANSYS buckling analysis) and the critical external pressure formula of steel penstocks adopted in the design specification (Mises formula). The stability analysis of the overhang steel liner shows that the circular tube scheme is superior to the semicircle tube scheme and its wall thickness should be 24mm for safety reason. Comparative analysis between ANSYS and Mises formula shows that it is feasible to analyze the compressive resistance stability of overhang steel liner by using Mises formula if the length is considered in an appropriate manner.

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Periodical:

Applied Mechanics and Materials (Volumes 405-408)

Pages:

3275-3278

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.405-408.3275

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Online since:

September 2013

Authors:

Gui Sheng Xu*, Jian Qiang Guo, Xin Xin Li

Keywords:

ANSYS, Circumfluence Hole, Compressive Resistance Stability, Mises Formula, Overhang Steel Liner

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References

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