| Citation: | LI Yu, WANG Siji, LI Chuan, et al. Model and study on vibration damping characteristics of squeeze film damper considering static eccentricity[J]. Journal of Aerospace Power, 2025, 40（12）：20240282 doi: 10.13224/j.cnki.jasp.20240282
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In order to investigate the effect of static eccentricity on the vibration reduction characteristics of squeeze film dampers, a static eccentricity squeeze film damper oil film force model was established based on Reynolds boundary conditions. The model validation and vibration attenuation characteristics analysis were completed by using a combination of numerical calculation and experimental methods. The results showed that as the static eccentricity increased, the nonlinear characteristics of the damper became stronger, the distortion of the journal motion trajectory became more severe, and the circumferential anisotropy of the oil film stiffness of the damper became more obvious, making it more likely to induce the system to produce a second harmonic. As the static eccentricity increased, the damping characteristics of the damper showed a trend of first increasing and then decreasing. The oil film force mechanics model established can better reflect the working characteristics of the damper and compensate for the model error defect in iteratively solving static eccentricity problems based on the oil film force mechanics model of concentric squeeze oil film dampers.
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