Calculation of the t-shaped shank of the steam turbine rotor blade
DOI:
https://doi.org/10.32347/2410-2547.2025.114.54-61Keywords:
finite element method, semi-analytical finite element method, stress-strain state, elastic deformation, rotary device fastening part, cylindrical body, sampling, elastic-plastic settingAbstract
The broad possibilities of the developed approach [8, 9, 11, 12] are illustrated by the solution of a new practically important task related to specific design developments.
The most important load-bearing elements of the rotors of steam turbines are the blade shanks. This paper presents the calculation of the T-shaped shank, which is affected by the forces caused by the rotation of the rotor. They consist of the surface load blade distributed over the area of the root section of the blade and mass forces distributed over the volume of the shank. but along some of its central parts. This leads to an uneven distribution of contact forces along the axis along the shank. The results of the calculation allow us to draw the following conclusions that in the case of a uniform load, the determination of stresses can be carried out within the framework of a flat setting, since this leads to a relatively small (five, eight percent) error compared to the spatial setting. Taking into account the uneven nature of the load distribution along the length of the shelf allows you to significantly clarify the level of maximum stresses in comparison with a flat problem. Thus, the value of the intensity of tangential stresses increased by more than thirty percent and exceeded the yield strength of the material. The results of the calculation of the shank beyond the elastic properties of the material are presented in this work and reflect the development of the zone of plastic deformations in the plane Z3'=0. By studying the influence of the geometric parameters of the shank, it was found that a decrease in the level of plastic deformations can be achieved by simultaneously increasingthe radiusthe gap and the width of the shelf.
References
Andrievskyi V.P. Determination of the resource of the blade of a gas turbine installation under thermoforce loading / V.P. Andrievskyi // Scientific Conf. of Young Scientists, Postgraduate Students and Students of KNUCA, 4-6 November 2008: theses of the supplement – Kyiv: KNUBA, 2008. – P. 49.
Andrievskyi V.P. Determination of the resource of the shank of the blade of the gas turbine installation / V.P. Andrievskyi // Scientific conf. of young scientists, postgraduates and students of KNUCA, 3-5 nov. 2009: abstracts supplement. –Kyiv: KNUBA, 2009. – Part 1. – P. 2627.
Bazhenov V.A. Determination of the resource of the gas turbine blade under creep conditions taking into account the continuous mechanics of destruction / V.A. Bazhenov, O.I. Gulyar, S.O. Piskunov, O.O. Shkryl // International scientific and technical journal "Problems of strength". – 2006. - No4. - P. 87-93.
Bazhenov V.A. Influence of taking into account geometric non-linearity on the value of the resource of the Christmas tree connection under creep conditions / V.A. Bazhenov, S.O. Piskunov, Yu.V. Maksymiuk, S.V. Mytsyuk // International scientific and technical journal "Problems of strength". – 2022. – No 3. – P. 33–38.
Bazhenov V.A. Estimation of the service life of the steam turbine locking valve body under thermal force load taking into account the shape change / V.A. Bazhenov, S.O. Piskunov, Yu.V. Maksymiuk, O.O. Shkryl // International Scientific and Technical Journal "Problems of Strength". – 2022. – No 4. – P. 56–64.
Semi-analytical method of finite elements in spatial problems of deformation, destruction and shape change of bodies of complex structure / [Bazhenov V.A., Maksymiuk Yu.V., Martyniuk I.Yu., Maksymiuk O.V.] – Kyiv: Karavela Publishing House, 2021. – 280 p. (in Russian).
Annenkov. A. Monitoring the deformation process of engineering structures using BIM technologies. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLVI-5/W1-2022 Measurement, Visualisation and Processing in BIM for Design and Construction Management II, 7–8 Feb. 2022, Prague, Czech Republic.
Bazhenov V.A. Semi-analytical method of finished elements in elastic and elastic-plastic position for curviline prismatic objects) / V.A. Bazhenov, A.A. Shkril', Yu.V. Maksymiuk, I.Yu. Martyniuk, О.V. Maksymiuk // Opir materialiv i teoriia sporud– 2020. 105. Pp. 24-32.
Huliar O.I. Universalnyi prýzmatychnyi skinchenyi element zahalnoho typu dlia fizychno i heometrychno neliniinykh zadach deformuvannia pryzmatychnykh til (Universal prismatic finite element of general type for physically and geometrically nonlinear problems of deformation of prismatic bodies) / O.I. Huliar, Yu.V. Maksymiuk, A.A. Kozak, O.V. Maksymiuk // Budivelni konstruktsii teoriia i praktyka – 2020. – Vyp. 6. – PP. 72–84.
Isaev O., Annenkov A., Demianenko R., Chulanov P.. Monitoring of the elements stability of building constructions by means of example of vertical elastic rod of high flexibility. Strength of Materials and Theory of Structures. No. 109 (2022). 416-425
Maksimyuk Yu.V. Basic relations for physically and geometrically nonlinear problems of deformation of prismatic bodies / Yu.V. Maksimyuk, S.O. Pyskunov, A.A. Shkril, O.V. Maksimyuk // Opir materialiv i teoriia sporud – 2020. – Vyp. 104. – S. 255–264.
Maksymiuk Yu.V. Alhorytm rozviazannia systemy liniownykh ta neliniinykh rivnian napivanalitychnym metodom skinchenykh elementiv dlia kryvoliniinykh neodnoridnykh prýzmatychnykh til (Algorithm for solving a system of linear and nonlinear equations by the semivanalytic finite element method for curvilinear inhomogeneous prismatic bodies) / Yu.V. Maksymiuk, M.V. Honcharenko, I.Iu. Martyniuk, O.V. Maksymiuk // Budivelni konstruktsii teoria i praktyka – 2020. – Vyp. 7. – PP. 101-108.
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