| Citation: | CHEN Xi, ZHANG Bo, FAN Xiangnan, et al. Experimental study on rotor-elastic damping support system in maneuvering flight states[J]. Journal of Aerospace Power, 2025, 40（4）：20240516 doi: 10.13224/j.cnki.jasp.20240516
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To deal with the issue of engine rotor vibration exceeding the limits during flights, experimental research on the rotor-elastic damping support system during maneuvering flight was conducted. The rolling, pitching, and yawing motions were simulated, finding that the maximum angular velocities can reach 3.5 rad/s. The dynamic responses of a multi-disk rotor system supported by squirrel-cage squeeze film dampers were studied, indicating that the changes in disk displacement, squirrel-cage strain, support velocity, and oil-film dynamic pressure were measured with different maneuvering motions and angular velocities. The results indicated that due to the anisotropy of stiffness in both horizontal and vertical directions, there existed two resonance peaks in the first two critical speeds. In case of rolling or pitching, even if the rotor was at idle state, the squirrel-cage support could undergo periodic deformation owing to the gravity; and the signals of displacement, strain, velocity, dynamic pressure, etc, were all superimposed with a low-frequency component. The additional inertial forces caused by pitching or yawing motions caused the displacement and strain of the rotor system to shift along the horizontal or vertical directions, respectively; and as the angular velocity increased, the offsets of corresponding measurement points became greater.
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