Analysis of Dynamic Characteristics of the Main Shaft System in a Hydro-turbine Based on ANSYS

Abstract

The parts of hydro-turbine and its stability is often damaged and affected by the vibration and this often results in great loss. The reason of vibration is various. Based on a real machine in laboratory, this paper uses ANSYS finite element software to model the main shaft system in the hydro-turbine generating unit. On this basis, it takes the modal analysis and calculates the critical speed of rotation. The results can provide a reference for dynamic analysis and a foundation for the design or improvement.