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Vibro-impact dynamics of large-scale geared systems

Abstract : This work is concerned with the analysis of vibro-impact responses observed in large-scale nonlinear geared systems. Emphasis is laid on the interactions between the high frequency internal excitation generated by the meshing process, i.e. the static transmission error (STE) and time-varying mesh stiffness (TVMS), and low frequency external excitations. To this end, a three-dimensional finite element (FE) model of a pump equipped with a reverse spur gear pair (gear ratio 1:1) is built. The model takes into account the flexibility of the kinematic chain, the bearings and the housing and the gear backlash nonlinearity. A reduced-order model is solved with the Harmonic Balance Method (HBM) coupled to an arc-length continuation algorithm which allows one to compute the periodic solutions of the system. The onset and disappearance of vibro-impact responses is studied through the computation of grazing bifurcations. Results show that the coupling between the external excitation and the time-varying mesh stiffness term greatly modify the characteristics of the responses in terms of number and periodicity of impacts and contact loss duration.
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Contributor : Adrien Mélot Connect in order to contact the contributor
Submitted on : Friday, July 29, 2022 - 2:07:36 PM
Last modification on : Wednesday, August 3, 2022 - 3:45:15 AM


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  • HAL Id : hal-03740450, version 1



Adrien Mélot, Joël Perret-Liaudet, Emmanuel Rigaud. Vibro-impact dynamics of large-scale geared systems. 2022. ⟨hal-03740450⟩



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