| Citation: | CHEN Yang, WU Yao, ZHANG Gongxue, et al. Analysis on dynamic characteristics of multi-leaf aerodynamic bearing under different pad distribution[J]. Journal of Aerospace Power, 2025, 40（8）：20220647 doi: 10.13224/j.cnki.jasp.20220647
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Multi-leaf hydrodynamic gas journal bearing is widely used in high-speed rotating machinery due to their advantages of high speed, high precision, and low wear. The partial derivative method and finite difference method (FDM) were used to solve the gas compressible Reynolds equation, the dynamic characteristics coefficient of the three-leaf aerodynamic bearing was calculated, and the influences of journal disturbance frequency, eccentricity, length diameter ratio and pad distribution position on the dynamic coefficient were discussed in detail. Research showed that the orthogonal stiffness and damping coefficient of the bearing increased with the rise of eccentricity ratio, length-diameter ratio and preload factor. As the bearing number and journal disturbance frequency rose, the orthogonal stiffness coefficient improved significantly, while the orthogonal damping coefficient showed the opposite trend, with the load on pad, the orthogonal stiffness (
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