Creep Bending Analysis of Combined Rotor for Gas Turbine Considering Contact Stiffness
- 10.2991/jimet-15.2015.220How to use a DOI?
- combined rotor;creep Bending;gas turbine;high temperature;ansys
Combined rotor is the core part of gas turbine and works in high temperature and high rotating speed environment in a long-term,creep bending of the combined rotor will make great effects on the gas turbine’s performance. To study the creep bending properties of gas turbine’s combined rotor considering the contact stiffness, in this paper, virtual material layer was used to equal the stiffness of contact interface when building the finite element model of combined rotor, and choosed the Norton creep constitutive model to carry out heat-solid coupling analysis with the FEA software ansys under a given temperature and stress fields. Firstly, the creep effect of balanced combined rotor of a 300MW gas turbine was calculated, got the main creep area of combined rotor and the creep quantitative data changing with time. Then, the relationship between creep bending amount of combined rotor with eccentric mass and time was researched.Results show that, the creep mainly occurred on shaft between twelfth wheel of the compressor and third wheel of the turbine; when the combined rotor got a eccentric mass, it would bend, and with time went on, the amount of eccentricity increased gradually, the bending rate also increased, and the bending rate of the 17th wheel of the compressor was the highest. The results of this dissertation will support reference for structure design and vibration analysis of the combined rotor.
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Haibiao Zhang AU - Ailun Wang PY - 2015/12 DA - 2015/12 TI - Creep Bending Analysis of Combined Rotor for Gas Turbine Considering Contact Stiffness BT - Proceedings of the 2015 Joint International Mechanical, Electronic and Information Technology Conference PB - Atlantis Press SP - 1166 EP - 1173 SN - 2352-538X UR - https://doi.org/10.2991/jimet-15.2015.220 DO - 10.2991/jimet-15.2015.220 ID - Zhang2015/12 ER -