涡轮泵转子弯扭耦合振动与分岔特性研究

根据实际涡轮泵转子建立质量集中的多盘转子模型,在考虑阻尼的情形下,推导建立不平衡转子弯扭耦合振动的动力学微分方程,并对其进行仿真,得到工作转速下涡轮泵转子弯扭耦合振动的特征图形;以转速为分岔特性参数,在不同偏心距下对涡轮泵转子的分岔特性进行研究发现,偏心距是转子弯扭耦合振动的重要影响因素,偏心距越大,涡轮泵转子的弯扭耦合振动作用越明显。

Research of bending-torsional vibrations and bifurcation characteristic of turbopumps rotor

A mass-centralized rotor model with multi-discs was established by considering the damping factor.The coupled bending and torsional vibrations differential equations of the unbalance rotor,and the coupled vibrations characteristic of the turbopumps rotor on working speed from simulation were deduced.Considering speed as the bifurcation characteristic parameter,some researches of bifurcation characteristic of the rotor under different eccentricity were performed.The results show that the eccentricity is one of the important reasons for coupled bending and torsional vibrations,the larger eccentricity was accompanied with much obvious coupled bending and torsional vibrations of the turbopumps rotor.