燃气轮机中心拉杆式转子临界转速计算方法——子结构传递矩阵法

Critical Speed Calculation of Gas Turbine Rotor with Central Tie-Rod by Sub-Structure Transfer Matrix Method

燃气轮机一般都具有复杂结构的转子-支承系统,其转子的临界转速无法用常规的传递矩阵法或Riccati传递矩阵法进行计算。本文用子结构传递矩阵法对一种复杂的具有中心拉杆结构的转子-支承系统进行了临界转速计算与分析,并将计算结果与试验数据进行了对比,证明子结构传递矩阵法可以解决这种复杂结构的转子-支承系统的临界转速计算问题。

The rotor-support system of most gas turbines is very complicated.Its critical speed can not be calculated by normal transfer matrix method or Riccati transfer matrix method.The aim of this article is to calculate the critical speed of a rotor-support system with central tie rod by sub-structure transfer matrix method.The presented computational result shows a good consistent with the measurement result,that implies the validity of sub-structure transfer matrix method for critical speed calculation of complicated rotor-support system.