失谐
振动
涡轮机械
刚度
情态动词
蒙特卡罗方法
非线性系统
结构工程
联轴节(管道)
控制理论(社会学)
物理
声学
工程类
机械
计算机科学
数学
材料科学
机械工程
统计
控制(管理)
量子力学
人工智能
高分子化学
作者
Zhufeng Liu,Peiyu Wang,Guojia Li,Yonghui Xie,Di Zhang
标识
DOI:10.1177/10775463231223773
摘要
The mistuning phenomenon is commonly seen in the bladed assemblies of turbomachinery, leading to an unreasonably localized energy distribution that may increase the risk of high cycle fatigue and potentially cause blade failure. The friction coupling interaction is often introduced to attenuate the effect of excessive amplification on the structural vibration. To investigate the vibration localization of damped and mistuned bladed-disk system, a typical mistuning characterization is applied to an improved four-degree-of-freedom lumped parameter model to explicit the vibratory properties with coupled frictional contact. The statistical findings of natural frequency and modal localization factor are obtained by employing the Monte Carlo simulation to explore the influence of mistuned variance and coupled stiffness on the modal localization of free and damped bladed-disk system, respectively. The forced response sensitivity featured in the mistuned variance is quantitatively analyzed from the perspective of vibration localization and energy distribution by the nonlinear solution method. The influence of excitation order and normal load are further, respectively, discussed on the response localization level of the mistuned system. The results can provide fundamental knowledge of the impact of the mistuning pattern on vibration localization for the early design of the aeroengine.
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