热固耦合作用下9F级燃气轮机碰摩转子的振动分析

针对燃气轮机转子碰摩故障的振动特性,建立了包含温度因素的9F级燃气轮机碰摩转子的动力学方程.建立9F级燃气轮机转子的结构模型,对燃气轮机转子进行瞬态热应力分析,同时考虑到碰摩力的影响.研究了9F燃气轮机转子从正常运行到停机72小时不同时刻的温度场及热应力.分析结果表明：采用有限元分析方法对9F级燃气轮机碰摩转子的振动特性研究是可行的,同时考虑到转子热固耦合作用的影响,对于更准确地研究转子的碰摩故障的振动特性具有重要意义.

Vibration analysis of 9F gas turbine rub impact rotors under thermal-structure coupling condition

Based on the vibration characteristics of gas turbine rotor rubbing fault, the dynamic equation of the 9F stage gas turbine rotor is established, and the temperature factor is introduced into the equation. Secondly, structure model of 9F gas turbine rotor is built. Then, the transient thermal stress analysis of the rotor is carried out, meanwhile, considering the influence of thermal-structure coupling. The temperature field and thermal stress of rotor from normal operation to 72 hours of shutdown are studied. The analysis results show that the application of finite element analysis method to study the vibration characteristics of the 9F gas turbine rotor is feasible. Furthermore, the effect of the rotor thermal-structure coupling is taken into consideration, and it is of great significance to study the vibration characteristics of rotor rubbing fault more accurately.