基于QZ算法的涡轮泵转子临界转速有限元计算

Critical speed computation of turbopump rotor based on finite element method and QZ algorithm

关键词:  液体推进剂火箭发动机  涡轮泵  涡轮转子  有限元法  临界速度

Key words:  Liquid propellant rocket engine  Turbine pump  Turbine rotor  Finite element method  Critical velocity

摘要:

QZ算法求解非对称矩阵广义特征值问题与转子动力学有限元法相结合计算涡轮泵转子临界转速,发展了相应的计算程序FEMQZ。在计算模型中考虑轮盘的陀螺力矩、轴套零件和叶轮浸液的影响。计算分析了某涡轮泵转子在弹性支承下的临界转速。实验结果表明,计算得到的一阶临界转速与实测值吻合,所发展程序能用于涡轮泵转子的动力特性分析。

Abstract:

To compute critical speed of turbopump rotor by finite element method for rotordynamic analysis combined with QZ Algorithm solving unsymmetrical matrix eigenvalue problem, the program FEMQZ has been developped. The FEM model includes the effects of Gyroscopic moment ,inertia moment of sleeve of shaft and liquid action when the impeller is steeped in liquid. The critical speed of one turbopump rotor on elastic support was computed by FEMQZ. The results show that the computed results of first order critical speed agree well with the experimental results. The program FEMQZ can be used to dynamic analysis of turbopump rotor.