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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

Qian Wenxue, Zeng Xianhai, Huang Shuanghui, Yin Xiaowei

Eksploatacja i Niezawodność

2023

Vol. 25, no. 3

art. no. 168771

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.

Wpływ nieliniowości geometrycznych i modelu materiału na stan naprężeń i odkształceń w tarczy turbiny lotniczego silnika odrzutowego

Wawrzyniak A., Wieczorek M.

Przegląd Mechaniczny

2000

nr 9

13-18

Modelling and analysis by the finite elements method of the state of stress and strain in the turbine disk of an aircraft jet engine. An axisymmetrical model of the turbine disk of the K16 engine used on the 122 "Irida" aircraft was developed. A thermoelastic analysis of shifts and strains in the disk was made. The influence upon the results was examined, exerted by ninlinearities resulting from considerable shifts and from the dependence of elastic properties of material on temperature. A thermoelastic analysis of stress and strains was also made. The influence was examined of loading, modulus of strain hardening and geometrical nonlinearities upon a maximal plastic strain.