Reliability-oriented optimal design of intentional mistuning for a bladed disk with random and interval uncertainties

Yoo, David; Lee, Ikjin; Tang, Jiong

doi:10.1080/0305215x.2016.1206538

Cited by 11 publications

(4 citation statements)

References 28 publications

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“…It can be seen from Table 6 that the maximum error of failure probability using the two methods under the same cut set is 8%, which shows that the reliability 46–48 evaluation with random, fuzzy and interval uncertainties can be realized by using the proposed method.…”

Section: Resultsmentioning

confidence: 92%

Reliability analysis of excavator boom considering mixed uncertain variables

Zhang

Liu

et al. 2020

Quality & Reliability Eng

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There are differences among sampling data and representation types of uncertain interval, fuzzy and random variables, which increases the complexity of structure reliability analysis. A α, β‐Cut‐FORM is proposed to analyze structure reliability considering the mixed uncertain variables. Fuzzy variables are optimized on the interval under two cut sets (α, β) based on the theory of cut set optimization. Interval variables are modeled with probability using a uniformity method. The proposed method involves the nested probabilistic analysis and interval analysis. The first‐order reliability method (FORM) is used for probabilistic analysis and nonlinear optimization is used for interval analysis. The excavator boom performance function is established for reliability analysis considering the mixed uncertain input variables, which verifies the effectiveness and advantages of the proposed method. And it has great application for safe and reliable design of excavator boom.

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Section: Resultsmentioning

confidence: 92%

Reliability analysis of excavator boom considering mixed uncertain variables

Zhang

Liu

et al. 2020

Quality & Reliability Eng

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“…In order to control the level of vibration localization of the forced response caused by mistuning, the intentional mistuning bladed disk is proposed (Han et al, 2014;Yoo et al, 2017;Martel et al, 2008;Chen et al, 2019;Beirow et al 2018Beirow et al , 2019. The results show that intentional mistuning has a great effect on the vibration localization.…”

Section: Introductionmentioning

confidence: 99%

A novel mathematical model for the design of the resonance mechanism of an intentional mistuning bladed disk system

Kan

Xing

2022

Mech. Sci.

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Abstract. Bladed disk systems with advanced functions are widely used in turbo-machineries. However, there are always deviations in physical dynamic properties between blades and blades due to the tolerance and wear in operation. The deviations will lead to vibration localization, which will result in high cycle fatigue and accelerate the damage of the bladed disk system. Therefore, many intentional mistuning patterns are proposed to overcome this larger local vibration. Previous studies show that intentional mistuning patterns can be used to reduce the vibration localization of the bladed disk. However, the determination of the resonance mechanism of the intentional mistuning bladed disk system is still an unsolved issue. In this paper, a novel mathematical model of resonance of an intentional mistuning bladed disk system is established. Mistuning of blades and energy resonance are included in this theoretical model. The method of the mechanical power of the rotating blade for one cycle is applied to obtain the resonance condition. By using this theoretical model, the resonance mechanism of an intentional mistuning bladed disk is demonstrated. The results suggest that the ideal results can be obtained by adjusting the intentional mistuning parameter. This paper will guide the design of the dynamic characteristics of the intentional mistuning bladed disk.

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“…For example, the intentional mistuning was introduced to reduce the forced response of blade [32][33][34][35]. In addition, some other scholars conducted the reliability and optimization of blades [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Nonproportional Intentionally Mistuned Turbine Blisk Design with Improved Component Modal Synthesis

Bai

Yang

Zhu

et al. 2021

Shock and Vibration

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An improved component modal synthesis-based nonproportional mistuning method (ICMS-NPMM) is proposed to investigate mistuned turbine blisks (MTBs) since the high-fidelity finite element models (HFEMs) involve large number of computations, which leads to low calculation efficiency. To reduce degrees of freedom and suppress the flutter of MTB, it is divided into mistuned blade structure and tuned disk structure, and the intentional mistuning is considered. Furthermore, the mistuned parameters, nonproportional mistuning, and complex loads are also considered. Firstly, the basic theory of ICMS-NPMM is investigated; secondly, the model of MTB is established via ICMS-NPMM; finally, the intentionally mistuned design of modal shape amplitudes (MSAs) is investigated via ICMS-NPMM. The results indicate that the calculation efficiency is enhanced via ICMS-NPMM relative to that of via HFEM. In addition, the sensitivity and the flutter are decreased; meanwhile, the amplitude fluctuations of MSAs are distinctly decreased and become comparatively smooth. This investigation provides an important guidance for the vibration characteristic study of complex mechanical structures in engineering practice.

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Reliability-oriented optimal design of intentional mistuning for a bladed disk with random and interval uncertainties

Cited by 11 publications

References 28 publications

Reliability analysis of excavator boom considering mixed uncertain variables

Reliability analysis of excavator boom considering mixed uncertain variables

A novel mathematical model for the design of the resonance mechanism of an intentional mistuning bladed disk system

Nonproportional Intentionally Mistuned Turbine Blisk Design with Improved Component Modal Synthesis

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