ICOPE-15-C033 Finite Element Analysis and Structure Strength Design of 700℃ USC Steam Turbine VHP Welded Rotors

Abstract

Structure strength design methods for very high pressure (VHP) rotors of 700℃ USC Steam Turbines are introduced. Steam thermal parameters of blade stages of VHP welded rotors are analyzed. The transient finite element analysis is implemented for start and shutdown process, including cold start, warm start, hot start, very hot start, sliding-pressure shutdown and normal shutdown, to obtain the temperature and stress distribution of the VHP welded rotor. The strength design criteria and strength analysis results are given for 700℃ USC steam turbine VHP welded rotor. The results show that the structure strength design of 700℃ USC Steam Turbine VHP welded rotor is safe.