Effect of mistuning parameters on dynamic characteristics of mistuned bladed disk

• Main Authors: Hongyuan Zhang, Haocun Dong, Tianyu Zhao, Xin Zhang, Huiqun Yuan
• Format: Article
• Language: English
• Published: JVE International 2021-03-01
• Series: Journal of Vibroengineering
• Subjects: mistuned bladed disk; tenon and mortise; mistuning parameter; gap; friction; coupling
• Online Access: https://www.jvejournals.com/article/21629

The aim of this paper is to study the nonlinear dynamics of the tenon and mortise of aero-engine compressor blades, based on lumped parameter model of tenon and mortise of blade disk system, considering the influence of gap and friction, The nonlinear vibration characteristics of mistuned bladed disk with different mistuning parameters are studied. The effects of tenon and mortise gap, dry friction, blade damping mistuning and tenon damping mistuning on the vibration characteristics of the mistuned bladed disk under strong coupling and weak coupling are obtained respectively. The results show that the gap and friction has little effect on the vibration response of the weakly coupled bladed disk, but the gap and friction has a great influence on the strongly coupled bladed disk, the larger the gap, the more complex the nonlinear dynamic characteristics of tenon. Under the same gap and coupling strength, the mistuning parameters have a certain influence on the vibration amplitude of the bladed disk.