Steam turbine rotor thermal stress on-line monitoring based on XDPS

This article discusses the rotor thermal stress on-line monitoring system on the XDPS configuration platform. The finite element geometrical model of the rotors is built for some domestic 200 MW unit. The heat stress field and the temperature field are calculated for the typical conditions by use of the large-scale finite element software. And the most dangerous part of the rotor could be decided and the trend of the largest stress value is obtained for different conditions. The mathematical model of on-line monitoring rotor stress is built with high accuracy by emendation of the stress simplified formula and the rotor temperature difference. This system combines the finite element analysis method and one-dimensional analytical method to establish the model based on the practical units parameters, so this model not only has a relatively higher accuracy but also meet the demand of on-time monitoring.