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以具有初弯的水平刚支Jeffcott转子系统为研究对象,建立变速过程中圆盘中心运动微分方程,运用数值分析方法对其进行仿真模拟,针对变速状态下系统振幅、相位角、进动角速度对不同初弯值、初弯与质量偏心间夹角以及不同系统内阻的响应规律进行了讨论研究。结果表明转子等变速越过临界转速时,其相位、振幅和进动角速度均会受到初弯大小和方向的影响;其次系统内阻对稳态涡动的相位、振幅和进动角速度没有影响;在等变速越过临界转速时,随着内阻尼的增大,进动角速度波动的极大值会增大,极小值减小。
Taking the first moment horizontal rigid support Jeffcott rotor system as the research object, the differential equations of the center of the disc during the speed changing process are established. The numerical analysis method is used to simulate it. According to the amplitude, phase angle and precession angular velocity Different initial bend value, the angle between the first bend and the mass eccentricity and the response rules of different system internal resistance were discussed. The results show that the phase, amplitude and precession angular velocity of the rotor will be affected by the size and direction of the initial bend when the rotor speed changes beyond the critical speed. Secondly, the internal resistance of the rotor has no effect on the phase, amplitude and precession angular velocity of the steady- When the speed exceeds the critical speed, as the internal damping increases, the maximum value of the precession angular velocity fluctuation will increase and the minimum value will decrease.