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Indexed by:Journal Papers

Date of Publication:2015-09-01

Journal:JOURNAL OF VIBROENGINEERING

Included Journals:SCIE、EI、Scopus

Volume:17

Issue:6

Page Number:3133-3146

ISSN No.:1392-8716

Key Words:multi-stage planetary gears; coupled modes; parameter sensitivity; rotational model

Abstract:This paper proposes a method of analyzing distinct modal characteristics to obtain accurate sensitivity of natural frequencies and coupled modes to system parameters of multi-stage planetary gears. A purely rotational dynamic model of multi-stage planetary gear system with general descriptions is established based on the lumped mass method. The vibration modes of multi-stage planetary gears are classified into overall and planet modes with unique properties. According to the modal energy distributions in multi-stage planetary gears, the natural frequencies are clustered by each dominant vibration stage. The modal properties of each cluster in the multi-stage planetary system are similar to the single-stage planetary gear system established by the associated dominant vibration stage. It is shown that, variation of gear parameters in one planet stage mainly affects the natural frequencies in the cluster associated with the same stage, while the coupling shaft parameters significantly impact the natural frequencies corresponding to the planet stage which contains the connected sun gear.