THERMAL SCIENCE

International Scientific Journal

ASSESSMENT OF THE DRUM REMAINING LIFETIME IN THERMAL POWER PLANT

ABSTRACT
In this paper analysis of stress and thermal-elastic-plastic strain of the drum is performed. Influence of modified thickness, yield stress and finite element model of welded joint between pipe and drum on assessment of the remaining lifetime of the drum in the thermal power plant is analyzed. Two analyses are compared. In the first, drum is modeled by shell and by 3D finite elements with projected geometrical and material data of drum. Then, the drum is modeled by shell and by 3D finite elements with modified thickness and yield stress. The analysis show that detailed modeling of stress concentration zones is necessary. Adequate modeling gives lower maximal effective plastic strain and increased number of cycles and, in that case, 3D finite elements are better comparing to shell finite elements.
KEYWORDS
PAPER SUBMITTED: 2010-05-07
PAPER REVISED: 2010-06-30
PAPER ACCEPTED: 2010-07-04
DOI REFERENCE: https://doi.org/10.2298/TSCI100507030Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2010, VOLUME 14, ISSUE Supplement 1, PAGES [S313 - S321]
REFERENCES
  1. Živković M., et al., Development of Software for Assessment of Remaining Lifetime of Basic Equipment of Thermal Blocks in Electric Power Industry of Serbia using Fracture Mechanics Methods, Faculty of Mechanical Engineering, Kragujevac, (2005).
  2. Kojić M., et al., PAK - Program for linear and nonlinear structural analysis, Faculty of Mechanical Engineering, Kragujevac, (2005).
  3. Živković M., et al., A general beam finite element with deformable cross-section, Computer Methods in Applied Mechanics and Engineering, 190 (2001), pp. 2651-2680.
  4. Kojic M., Bathe K. J., Inelastic Analysis of Solids and Structures, Springer, Berlin-Heidelberg, (2005).
  5. Živković M., Nonlinear structural analysis, monograph, Faculty of Mechanical Engineering, Kragujevac, (2006).
  6. Československa Statni Norma, OCEL 15223 Mn-Mo, ČSN 41 5223, (1977).
  7. Kojić M., et al., Finite element method I - linear analysis, Faculty of Mechanical Engineering, Kragujevac, 1998.
  8. Lazić, V., et al., Theoretical-Experimental Determining of Cooling Time (t8/5) in Hard Facing of Steels for Forging Dies, Thermal Science, Vol. 14 (2010), No. 1, pp. 235-246.
  9. Jovičić G., et al., Residual life estimation of power plant component the high pressure turbine housing case, Thermal Science, Vol.13 (2009), No.4, pp. 99-106.
  10. Jovičić G., Živković M., Jovičić N., Numerical Simulation of crack modelling using extend finite element method, Strojniski vestnik - Journal of Mechanical Engineering, 55 (2009), pp. 549-554.

© 2022 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence