| Citation: | WANG Danfeng，GUO Yu.Vibration simulation of planetary gearbox with planet⁃carrier crack［J］.Journal of Aerospace Power，2022，37（7）：1447‑1455. doi: 10.13224/j.cnki.jasp.20210267
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To deeply understand the vibration spectrum structure，a vibration simulation model considering the time⁃varying transfer paths and the uneven load sharing of the planetary gearbox was proposed.According to angular shift function of planet gears caused by the crack，the effect of the angular shift of planet gears on load sharing was analyzed.The spectrum sideband structure under the planet gear angular shift caused by the planet⁃carrier crack and the non⁃uniform load distribution was simulated and analyzed.The simulation results showed that when the number of planet gears was 3，the sideband was only affected by the additional angular displacement of planet gears.When the number increased to 4 and 5，the spectral sideband was jointly affected by the angular displacement and load distribution among planets，and the modulation sideband components with the rotation order of carrier appeared in the order spectrum.By comparing the order spectrum structure of the simulated signal and measured signal of the planetary gearbox with 3 planets，the effectiveness of the proposed model was verified.
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