Study On The Contact Analysis Technology And Optimal Figure Design Of The Root And Groove For Steam Turbine Long Blades

Recently, in order to improve power plant thermal efficiency, steam turbine blades have been used under the severe mechanical strength condition. In particular the blade root supports large centrifugal and vibrational forces. The optimum design for the root and groove shape of turbine blades must be performed in order to improve the mechanical reliability of turbne. In this paper, an effective method for solving this type of problem using sensitivity analysis based on FEM with linear programming is discussed. The optimal figure of the blade root and groove of which all peak stresses are reduced is obtained with this program system.