Scholarly record
FINITE ELEMENT METHODS TO EVALUATE FATIGUE LIFE FOR HYDROPOWER PLANT MAINTENANCE
Abstract
Fatigue damage is determined from time signals of loading, usually in the form of stress or strain. However, there are many design scenarios when the loading, or fatigue damage process, cannot easily be defined using time signals. In these cases the design/operation engineer usually has to use a test based approach to evaluate the fatigue life of the structure or the component. Alternatively, a frequency based fatigue calculation can be used where the loading and response are represented using Power Spectral Density (PSD) functions. There are also many situations where structures from the hydropower plants equipment are subjected to a random form of loading coming from the hydraulic shocks (during sudden closing of the intake valves or fast opening to take the unit to the requested power when the grid is requesting in order to keep the safety in operation and supply), electrical power fluctuation with a strong and fast variation of frequency to the grid and therefore a powerful response from the speed governor (for grid safety purposes), etc. All of these situations can be analyzed using new and modern techniques of fatigue life estimation that can now be incorporated into the Finite Elements Analysis (FEA) environment, enabling fatigue life calculations to be done at a computer model level. The aim of proposed paper is to develop a reliable and accurate methodology to evaluate the fatigue life of the turbine shaft based on operational data.
Publication Impact Profile
Publication details
References9
Dejan Momcilovic, Zoran Odanovic, Radivoje Mitrovic, Ivana Atanasovska, Tomaz Vuherer: Failure analysis of hydraulic turbine shaft, Engineering Failure Analysis 20 (2012) 54–66, Elsevier
Urquiza G., Garcia J.C., Gonzales J.G., Castro L., Rodriguez J.A., Basurto-Pensado M.A., Mendoza O.F., Failure analysis of a hydraulic Kaplan turbine shaft, Engineering Failure Analysis, volume 41, June 2014, pp. 108-117
Constantin Dragoi, Vlad Florin Piraianu, Calin Husar, Mihail Grovu – Lifetime Evaluation of Hydropower Plants Mechanical Equipment for Predictive Maintenance, 16th International Multidisciplinary Scientific GeoConferences SGEM 2016, 28 June – 7 July, Albena, Bulgaria
Constantin Dragoi, Vlad Florin Piraianu, Cristi Irimia, Lifetime evaluation of the mechanical elements for hydraulic turbines by numerical simulation, Industrial Simulation Conference 2013, Proceedings, 22-24 Mai 2013, Ghent, Belgium
Puolakka O., Keto-Tokoi J., Matusiak J., Unsteady load on an oscillating Kaplan turbine runner, Engineering Failure Analysis, volume 44, September 2014, pp. 136-147;
Mihail Grovu, Cristi Irimia, Ioan Calin Rosca, Calin Husar, Maria Violeta Guiman: Simulation Environment for Fatigue Analysis of Car Wheel Rim under Radial Fatigue Test, International Congress of Automotive and Transport Engineering, CONAT Brasov, Romania, October 26-29, 2016
Horia Abaitancei, Sebastian Radu, Cristi Irimia, Mihail Grovu and Calin Husar: Stress analysis of the contact between driving roller and excentric cam for a hydraulic sonic motor, European Automotive Congress, EAEC-ESFA Bucharest, 25-27 November 2015
https://en.wikipedia.org/wiki/Fatigue_(material)
Bruce Boardman, Fatigue Resistance of Steels, ASM Handbook, Volume 1: Properties and Selection: Irons, Steels, and High-Performance Alloys, ASM Handbook Committee, p 673-688
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
