【摘要】 针对双转子系统复杂的动力学特性以及总是存在的质量不平衡现象，建立内外双转子系统动力学模型，通过轴心轨迹图、时域图、频谱图、庞加莱截面图和分岔图分析其振动特性，并通过双转子系统实验台升速和不平衡实验验证了理论和仿真结果。结果表明：双转子系统在升速过程中会发生2次振幅突然加剧的现象，2次主共振分别由内、外转子转速达到系统固有频率引起；双转子系统在不同的转速下会呈现出不同的振动特性；增大内转子的不平衡量，不仅会影响内转子系统振动响应，还会影响外转子系统振动响应，并且对前者的影响更显著。更多还原

【Abstract】 In terms of the complex dynamic characteristics and mass imbalance phenomenon of a dual-rotor system, a dynamic model of the internal and external dual-rotor system was established. Its vibration characteristics were analyzed through axis trajectory diagram, time-domain diagram, spectrum diagram, Poincaré cross-section diagram and bifurcation diagram, and a dual-rotor experimental platform was built to conduct the acceleration and imbalance experiments and verify the correctness of theoretical research and computer simulation. Results show that during the acceleration process of the dual-rotor, there will be two sudden increases in amplitude, and the two main resonances are caused by the internal and external rotor speeds reaching the natural frequency of the system respectively. The dual-rotor system exhibits different vibration characteristics at different speeds. Increasing the imbalance of the internal rotor not only affects the vibration response of the internal rotor system, but also affects the vibration response of the external rotor system, and the impact on the former is more significant.更多还原