Numerical and experimental strength analysis of fire-tube boiler construction
Апстракт
Norms, such as EN 12952-3 and EN 12953-3 handle the issues concerned with calculation of the pressurized boiler components, not however considering the influences of thermal strains that are often of vital importance for the integrity of boiler's construction. Application of FEM in boiler design in EN is suggested in calculating all components that are not covered by the norm. In this way, the calculation of thermal stress is left to the free will of designer and technical inspectorate which supervises and approves placement of a boiler into operation. This paper demonstrates that the influence of thermal stresses is great and that it must be taken into consideration when the boiler's construction is designed and its working life evaluated. It is shown that for every construction a numerical-experimental behaviour diagnostics should be conducted prior to putting it into operation. First, a numerical model must be experimentally verified and then it can be used in considering different ...parameters of strength diagnostics, such as distribution of membrane and bending stresses for substructures, and distribution of deformation energy. They indicate, in an optimal way, root causes of insufficiently good behaviour of the construction. Also, a dynamical calculation of natural oscillations should always be suggested.
Кључне речи:
temperature / stress / steam-boiler / finite element analysis / experiment / deformation energyИзвор:
Tehnički vjesnik, 2011, 18, 2, 237-242Издавач:
- Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
Институција/група
Inovacioni centarTY - JOUR AU - Gaćeša, Branka AU - Milošević-Mitić, Vesna AU - Maneski, Taško AU - Kozak, Dražan AU - Sertić, Josip PY - 2011 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1342 AB - Norms, such as EN 12952-3 and EN 12953-3 handle the issues concerned with calculation of the pressurized boiler components, not however considering the influences of thermal strains that are often of vital importance for the integrity of boiler's construction. Application of FEM in boiler design in EN is suggested in calculating all components that are not covered by the norm. In this way, the calculation of thermal stress is left to the free will of designer and technical inspectorate which supervises and approves placement of a boiler into operation. This paper demonstrates that the influence of thermal stresses is great and that it must be taken into consideration when the boiler's construction is designed and its working life evaluated. It is shown that for every construction a numerical-experimental behaviour diagnostics should be conducted prior to putting it into operation. First, a numerical model must be experimentally verified and then it can be used in considering different parameters of strength diagnostics, such as distribution of membrane and bending stresses for substructures, and distribution of deformation energy. They indicate, in an optimal way, root causes of insufficiently good behaviour of the construction. Also, a dynamical calculation of natural oscillations should always be suggested. PB - Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek T2 - Tehnički vjesnik T1 - Numerical and experimental strength analysis of fire-tube boiler construction EP - 242 IS - 2 SP - 237 VL - 18 UR - https://hdl.handle.net/21.15107/rcub_machinery_1342 ER -
@article{ author = "Gaćeša, Branka and Milošević-Mitić, Vesna and Maneski, Taško and Kozak, Dražan and Sertić, Josip", year = "2011", abstract = "Norms, such as EN 12952-3 and EN 12953-3 handle the issues concerned with calculation of the pressurized boiler components, not however considering the influences of thermal strains that are often of vital importance for the integrity of boiler's construction. Application of FEM in boiler design in EN is suggested in calculating all components that are not covered by the norm. In this way, the calculation of thermal stress is left to the free will of designer and technical inspectorate which supervises and approves placement of a boiler into operation. This paper demonstrates that the influence of thermal stresses is great and that it must be taken into consideration when the boiler's construction is designed and its working life evaluated. It is shown that for every construction a numerical-experimental behaviour diagnostics should be conducted prior to putting it into operation. First, a numerical model must be experimentally verified and then it can be used in considering different parameters of strength diagnostics, such as distribution of membrane and bending stresses for substructures, and distribution of deformation energy. They indicate, in an optimal way, root causes of insufficiently good behaviour of the construction. Also, a dynamical calculation of natural oscillations should always be suggested.", publisher = "Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek", journal = "Tehnički vjesnik", title = "Numerical and experimental strength analysis of fire-tube boiler construction", pages = "242-237", number = "2", volume = "18", url = "https://hdl.handle.net/21.15107/rcub_machinery_1342" }
Gaćeša, B., Milošević-Mitić, V., Maneski, T., Kozak, D.,& Sertić, J.. (2011). Numerical and experimental strength analysis of fire-tube boiler construction. in Tehnički vjesnik Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek., 18(2), 237-242. https://hdl.handle.net/21.15107/rcub_machinery_1342
Gaćeša B, Milošević-Mitić V, Maneski T, Kozak D, Sertić J. Numerical and experimental strength analysis of fire-tube boiler construction. in Tehnički vjesnik. 2011;18(2):237-242. https://hdl.handle.net/21.15107/rcub_machinery_1342 .
Gaćeša, Branka, Milošević-Mitić, Vesna, Maneski, Taško, Kozak, Dražan, Sertić, Josip, "Numerical and experimental strength analysis of fire-tube boiler construction" in Tehnički vjesnik, 18, no. 2 (2011):237-242, https://hdl.handle.net/21.15107/rcub_machinery_1342 .