【摘要】 为适应大容量汽轮发电机组转子寿命在线监测系统的需要 ,解决有限元法计算效率低 ,不能应用于在线计算的问题 ,对现有热应力简化公式进行了计算 ,并与有限元法的计算结果进行了比较 ,计算结果表明一维差分法比较适用于启停机工况的热应力计算 ,从而为转子在线监测系统热应力计算公式的合理选取提供了依据更多还原

【Abstract】 WT5”BZ] In order to meet the needs of rotor lifetime online supervising and computing system of large capability turbine generator, to solve the problem that finite-element method cann’t be used in online computing because of its low computing efficiency, three reduction formulas in existence are computed and compared with the finite-element method result. The results of the calculation show that the one-dimension difference method fits the need of turbine rotor thermal stress online computing during the operational phases of start-up and shutdown. Based on the conclusion, a reasonable selection of online thermal stress reduction formula can be made for rotor online supervision system. [WT5HZ]更多还原