反向旋转双转子系统加速响应特性研究

以五支点双转子系统为研究对象，开展反向旋转双转子系统加速响应特性研究。结合有限元分析软件，利用固定界面模态综合法建立反向旋转双转子试验器的瞬态动力学模型，研究反向旋转双转子系统加速过程中加速时域特性、进动转速变化特性及内外转子盘质心变化规律。研究结果表明,转子各截面加速响应特性与系统各阶临界转速及振型有密切联系；加速过程中存在复杂的非协调进动；内、外转子分别在以各自为主激励的临界转速附近发生质心换向；经试验验证，试验数据与计算结果吻合性较好。

Research on acceleration response characteristics of the counter-rotating dual rotor system

Acceleration response characteristics of a five-support counter-rotating dual-rotor system are studied. The transient dynamic model of the experimental counter-rotating dual-rotor system is established with finite element analysis software and fixed interface modal synthesis method. The acceleration time-domain characteristics, precession speed variation characteristics and the change laws of centroid of every disk in the rotor system are analyzed in the acceleration process. The study results show that: acceleration response characteristics of various cross-sections have a close relation with critical speeds and mode shapes of the rotor system; complex nonsynchronous precession exists in the acceleration process; centroid shift of inner and outer rotor occurs to their incentive critical speed respectively. Experimental verification was carried out, calculation results are in good agreement with experiment data.