Experimental and numerical analysis of transient thermal stresses on thick-walled cylinder

Teixeira, M.J.; Zilio, G.; Mortean, M.V.V.; Paiva, K.V. de; Oliveira, J.L.G.

doi:10.1016/j.ijpvp.2023.104884

Cited by 11 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even more intensive heat exchange occurs during the condensation phase in the cold start-up mode, which leads to further thermal stresses and lifetime reduction [1] according to Sátor et al Therefore, the accuracy of lifetime prediction is strongly affected and dependent on the accuracy of the transient thermal state, allowing engineers to design more efficient and reliable systems. Some relevant studies under transient analysis are covered in the references [2][3][4][5][6][7][8][9]. In this study, transient analysis of the thermal bending and vibration of steam turbine rotors was explored using finite element analysis (FEA) simulation with analytical validation.…”

Section: Introductionmentioning

confidence: 99%

Transient Analysis of Thermal Bending and Vibration of Steam Turbine Rotor

Omenife,

Desai,

Dunne

2023

Sci. Eng. Technol.

View full text Add to dashboard Cite

Rotor-bearing systems often exhibit nonlinear behavior due to hydrodynamic effects and external forces. Finite element methods based on linear analysis are commonly used for rotor dynamic analyses, where nonlinear bearing/damping forces are linearized into equivalent stiffness and damping coefficients. However, this method may not accurately describe strongly nonlinear systems. Engineers use transient analysis and nonlinear models to improve rotor behavior analysis. This study investigates the effects of transient-thermal bending and vibration on a high-pressure steam turbine rotor using the finite element method. A scaled rotor-shaft was used to study thermal bending and vibrations caused by steam heat. The design of the shaft was based on an existing power station high-pressure turbine rotor. Numerical modal analyses were performed using ANSYS software to obtain a partial level of integrity between the numerical model and the analytical model. Natural frequencies were compared between the experimental, numerical, and analytical results, which showed good correlations.

show abstract