Taking a high-head hydropower station as an example,spherical manifold and crescent rib bifurcation have been calculated by three-dimensional finite element method with the ANSYS software.

The parametric and automation design of Y-shaped crescent rib bifurcation has been discussed.

Through an illustration of a hydroelectric project,finite element analysis of the steel Y-pipe with crescent rib has been introduced in this case,it will be possible to learn the stress distribution on whole structure by finite element analysis of stress calculation of branch pipes and enable us to the reasonable engineering measures.

Design of surrounding rock to share internal water pressure in crescent ribbed Y-pipes of Xilongchi pumped-storage power station;

The traditional design method of the crescent rib on the screw-thre ad steel finished product passes is very overelaborate and the results obtained based on it have some errors.

The effect on the integral structure stress of bifurcated pipe under different crescent rib thickness is studied,and the optimal dimension of crescent rib thickness is present on the condition of that bifurcated pipe structure is safe.