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

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。

To compute critical speed of turbopump rotor by finite element method for rotor dynamic analysis combined with QZ Algorithm solving unsymmetrical matrix eigenvalue problem, the program FEMQZ had been developed. The FEM model included the effects of Gyroscopic moment, inertia moment of sleeve of shaft and liquid action when the impeller was 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 for dynamic analysis of turbopump rotor.