Suppression of Vibration Localization in Mistuned Bladed-disk Structures by SSDI Piezoelectric Network

doi:10.3901/JME.2024.21.168

Abstract

Abstract: A method named synchronized switch damping on inductor (SSDI) is proposed to aim at the issue of vibration localization in mistuned bladed-disk (blisk) structures of aero-engines. Firstly, the operational principle of the SSDI method is introduced, and its vibration reduction mechanism is analyzed. Subsequently, a lumped parameter model of the blisk is established, and the dynamic equations for the mistuned blisk are derived. Four cases are considered including open-circuit state, SSDI shunting, series-connected SSDI piezoelectric network, and parallel-connected SSDI piezoelectric network. Furthermore, a novel evaluation factor - the energy homogenization factor - is proposed, and the effectiveness of SSDI in suppressing localization of mistuned blisks under these four cases is compared. Finally, a dual-beam system with an SSDI piezoelectric network is employed for experimental validation, simulating the aero-engine's blisks. The results demonstrate that the parallel-connected SSDI piezoelectric network not only achieves better damping performance with fewer switches, but also significantly suppresses the vibration localization in mistuned blisks. Moreover, SSDI piezoelectric network does not need for electrical parameter optimization, showing significant potential for practical applications.

Key words: mistuned bladed-disk, vibration localization, synchronized switch damping, piezoelectric network, energy homogenization

CLC Number:

V231

ZHANG Fengling, ZHANG Dawei, AI Yanting, TIAN Jing, WANG Zhi. Suppression of Vibration Localization in Mistuned Bladed-disk Structures by SSDI Piezoelectric Network[J]. Journal of Mechanical Engineering, 2024, 60(21): 168-179.

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