Research on meshing impact and meshing energy consumption of spur gear system under time-varying-random excitation

Abstract

Abstract: To study the meshing-impact characteristics of spur gear system under combined time-varying and stochastic excitations, a time-varying and random external excitation model of the gear system is proposed. Based on this, a meshing-impact non-linear dynamic model of spur gear pair, including tooth surface friction and time-varying meshing position under bridge-road excitation, is established. The evolutions of the impact force and the maximum impact energy loss with the meshing frequency and error amplitude are analyzed by constructing the Poincaré mapping section of the contact impact on the tooth surface and the tooth back. The effects of bifurcation and chaos on the dynamic meshing force and maximum impact energy loss are studied using nonlinear vibration theory. Additionally, the distribution characteristics of the maximum impact energy loss in a two-parameter plane are discussed. The results show that the error amplitude, meshing frequency, and their matching law greatly affect the dynamic meshing force and impact energy loss, which in turn critically affect the dynamic performance of the gear system. These findings provide a scientific basis for the dynamic performance improvement and reliability application of this type of gear system.

Key words: gear vibration, meshing impact, impact energy loss, nonlinear dynamic

CLC Number:

TH132

HAN Wei, YANG Xing, SHI Jian-fei. Research on meshing impact and meshing energy consumption of spur gear system under time-varying-random excitation[J]. Journal of Lanzhou University of Technology, 2024, 50(6): 58-64.

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