Design of Viscoelastic-dry Friction Damping Ring for Micro-vibration Suppression of a Flywheel

doi:10.3901/JME.2020.23.098

Abstract

Abstract: In the engineering field, damping ring is used to suppress the vibration amplification in launching phase and the micro vibration on orbit of the flywheel. One of the vibration suppression mechanisms is the dynamic vibration absorber (DVA). Due to the wide range of temperature difference in the working environment, the damping and stiffness properties of the viscoelastic materials used in the damping ring will change, which will destroy the optimal parameters of the damped DVA. For this problem, the influence of dry friction damping on the interface of the damping ring is further studied. A multi-degree-of-freedom lumped parameter model of the viscoelastic-dry friction damping ring-flywheel system is established. Firstly, the dry friction damping is not considered, according to the effective modal mass of the flywheel, the optimal parameters of the viscoelastic damping ring are determined. Then the optimal parameters of both the dry friction damping ring and the viscoelastic-dry friction damping ring are obtained by using the genetic algorithm. The disturbing forces transmitted to foundation by flywheel under both the optimal and non-optimal parameters are compared and analyzed. The results show that the dry friction damping can not only further broaden the viscoelastic damping ring's frequency range of vibration suppression, but also improve the robustness of the ring.

Key words: damping ring, dynamic vibration absorber(DVA), dry friction damping, genetic algorithm, effective modal mass

CLC Number:

TB535
O322

HE Xiaodong, HUANG Xiuchang, HUA Hongxing. Design of Viscoelastic-dry Friction Damping Ring for Micro-vibration Suppression of a Flywheel[J]. Journal of Mechanical Engineering, 2020, 56(23): 98-106.

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