Finite Element Analysis of Steel Liner in the Gradual Change Segment of Downstream Dam Surface Penstock

Abstract:

Taking dam body and steel liner in the gradual change segment of inlet of a hydropower station as the research target, structure analysis is carried out by use of the large finite element software. Temperature variation load and external pressure load equivalent to internal vacuum 0.2MPa pressure are considered. Stress and distribution of the dam, steel liner and the stiffener rings are obtained. The calculation results show that, steel liner structure in the gradual change segment has sufficient rigidity; the stress state of steel liner structure is very complex and the stress concentration in stiffener rings is significant; the stress value in sharp-angled area of stiffener ring structure is also very high. Anchor reinforcement with radial constraints and transverse stiffeners are suggested to add to the steel liner, so as to improve the force bearing conditions of steel liner structure in the gradual change segment of inlet. The obtained results and conclusions can be referenced for the design of steel liner structure in the gradual change segment of inlet.

• Periodical: Advanced Materials Research (Volumes 219-220)
• Pages: 685-688
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.219-220.685
• Online since: March 2011
• Authors: Xin Li Bai, Qian Pan, Hai Li Su
• Keywords: Downstream Dam Surface Penstock, Finite Element Analysis (FEA), Gradual Change Segment, Steel Liner, Stiffener Ring

References

[1] X.C. Wang: Finite Element Method (Tsinghua university press, 2003).

[2] SL/T191-96, Hydraulic design specification for concrete structures (China Water Press, 1996).

[3] DL/T5141-2001, Hydropower penstock design specification (China Electric Power Press, 2001).

[4] SL266-2001, Hydropower plant design specification (China Water Press, 2001).

[5] GB50017-2003, Steel structure design codes (China Construction Press, 2003).