Fatigue Reliability Analysis of a Compressor Disk Based on Probability Cumulative Damage Criterion

Ren, Jungang; Zhao, Zhiqiang; Hu, Zhiyong

doi:10.3390/ma13092182

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…For turbine structures, there are multiple sites in the structure that tend to damage due to the geometric complexity and loading diversity [31,32]. In systems with variable amplitude loads, there will be a statistical dependency between the failure of each danger site [30]. This situation is similar to the failure of a system with multi-site damage.…”

Section: Introductionmentioning

confidence: 99%

Reliability analysis of multi-site damage with failure dependency of the turbine based on flow-thermal-solid coupling analysis and the Monte Carlo validated simulations

Qian¹,

Zeng²,

Huang³

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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The harsh environmental loads may lead to strength failure in the turbine in an aero-engine. To accurately assess the strength reliability of the turbine under multiple loads, the stress distributions of 41 danger sites of a turbine under thermal, centrifugal, and pneumatic loads were determined by the flow-thermal-solid coupling analysis using ANSYS. Second, based on the flow-thermal-solid coupling analysis and response surface method, the probabilistic analysis model of stress at the danger site was established. And the probabilistic distribution of stress was determined by sampling and hypothesis testing. Finally, the reliability model of the turbine with multi-site damage and failure dependency was established, by which a reliability of 0.99802 was calculated. And the actual reliability of the turbine was 0.99626 determined by the Monte Carlo simulations, which verified the model in precision. The results indicated that the reliability model has a high efficiency and higher precision than the traditional reliability model with failure independence.

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Section: Introductionmentioning

confidence: 99%

Reliability analysis of multi-site damage with failure dependency of the turbine based on flow-thermal-solid coupling analysis and the Monte Carlo validated simulations

Qian¹,

Zeng²,

Huang³

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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show abstract

“…8 For the fatigue failure characteristics of the compressor disk in an aero engine, the fatigue reliability of its damage structure in service was analyzed by using the probability cumulative damage criterion. 9 A novel cumulative damage model was proposed for assessing the time-dependent reliability analysis of deteriorating structures. 10 An improved dynamic reliability model for the compressor rotor system was developed.…”

Section: Introductionmentioning

confidence: 99%

A fatigue reliability assessment model for welded structures based on the structural stress method

Zhou

Hao

Liang

et al. 2023

Advances in Mechanical Engineering

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Since many factors affect the fatigue life of welded structures and the relationships between them are complex, finding effective ways to improve the fatigue reliability of welded structures has always been a challenge for the industry. A fatigue reliability assessment model and design method for welded structures based on the structural stress method is proposed. According to the limit state equation of the model, the design-life fatigue reliability and the service fatigue reliability assessment approaches are presented. Then, a first-order second-moment method is employed to reveal quantitative fatigue reliability for welded joints and structures. The relationships between the fatigue reliability and the influence variables are used to analyze and improve the welded structure design. Fatigue reliability of T-joint examples was assessed by accounting for weld leg sizes, plate thicknesses, penetration depths, and single-sided and double-sided forms. Furthermore, the assessment model was verified with a welded bogie frame. The fatigue reliability of the frame was improved based on the evaluation results. The model and method can be applied to other types of welded joints and welded structures.

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“…the probabilistic fatigue analysis is more reflective of the fatigue failure of the structure [10][11][12] .…”

mentioning

confidence: 99%

Fatigue Reliability Assessment Method for Aero-engine Compressor Blade-disk System with Failure Dependency between Components Based on Response Surface Method

Qian

Zeng

Huang

et al. 2022

Preprint

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The compressor blade-disk system of an aero-engine is a complicated system with numerous components, and the failures of components are related. To evaluate its reliability accurately and efficiently, a fatigue reliability assessment method to handle the issues with failure dependency between components was proposed. Firstly, the finite element analysis was carried out considering the dispersion of load and material; secondly, the probabilistic distributions of stress, strain, and fatigue life of components were fitted by the response surface method; finally, the multi-component failure-dependent reliability model (MCFDM) of the compressor blade-disk system was established based on the dependent failure system reliability theory. Based on this model, the fatigue life of the blade-disk system at varying reliability levels and the reliability and failure probability at varying specified life levels were calculated. The results of MCFDM are compared with those of the independent failure reliability assessment model(IFM) and the traditional Monte Carlo method(MCM). It is demonstrated that the system reliability calculated by IFM is too optimistic, while MCM requires a large number of samples based on the finite element model directly. In comparison, MCFDM can offer results with sufficient accuracy and higher efficiency.

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Fatigue Reliability Analysis of a Compressor Disk Based on Probability Cumulative Damage Criterion

Cited by 5 publications

References 31 publications

Reliability analysis of multi-site damage with failure dependency of the turbine based on flow-thermal-solid coupling analysis and the Monte Carlo validated simulations

Reliability analysis of multi-site damage with failure dependency of the turbine based on flow-thermal-solid coupling analysis and the Monte Carlo validated simulations

A fatigue reliability assessment model for welded structures based on the structural stress method

Fatigue Reliability Assessment Method for Aero-engine Compressor Blade-disk System with Failure Dependency between Components Based on Response Surface Method

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