Analysis of Strength of Energy Storage Flywheel Rotating at a High Speed

Abstract

The technology of flywheel energy storage is already widely used in motorcar, electric power systems, spaceflight and martial fields. Decreasing the weight, increasing rotating speed and strength of the flywheel rotor and improving the energy storage efficiency of the flywheel are always attention-getting. In this paper, a flywheel energy storage is designed and finite element analysis is done to obtain the stress distribution of it before being produced. The maximum and variety of radial stress and circumferential stress are studied and the influence of composite material wrapped on flywheel rotating at high speed is discussed. Then the action of composite material to stress concentration around the small hole on the hub is thought about. The results of this analysis can prepare a valuable guide for flywheel energy storage at design and manufacture stage.