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master's thesis
Odziv plinsko-turbinske lopatice na harmonijsko gibanje podloge
2024. urn:nbn:hr:190:158801
Lakoseljac, Ivan
University of Rijeka
Faculty of Engineering

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Lakoseljac, I. (2024). Odziv plinsko-turbinske lopatice na harmonijsko gibanje podloge (Master's thesis). Rijeka: University of Rijeka, Faculty of Engineering. Retrieved from https://urn.nsk.hr/urn:nbn:hr:190:158801

Lakoseljac, Ivan. "Odziv plinsko-turbinske lopatice na harmonijsko gibanje podloge." Master's thesis, University of Rijeka, Faculty of Engineering, 2024. https://urn.nsk.hr/urn:nbn:hr:190:158801

Lakoseljac, Ivan. "Odziv plinsko-turbinske lopatice na harmonijsko gibanje podloge." Master's thesis, University of Rijeka, Faculty of Engineering, 2024. https://urn.nsk.hr/urn:nbn:hr:190:158801

Lakoseljac, I. (2024). 'Odziv plinsko-turbinske lopatice na harmonijsko gibanje podloge', Master's thesis, University of Rijeka, Faculty of Engineering, accessed 21 October 2024, https://urn.nsk.hr/urn:nbn:hr:190:158801

Lakoseljac I. Odziv plinsko-turbinske lopatice na harmonijsko gibanje podloge [Master's thesis]. Rijeka: University of Rijeka, Faculty of Engineering; 2024 [cited 2024 October 21] Available at: https://urn.nsk.hr/urn:nbn:hr:190:158801

I. Lakoseljac, "Odziv plinsko-turbinske lopatice na harmonijsko gibanje podloge", Master's thesis, University of Rijeka, Faculty of Engineering, Rijeka, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:190:158801

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Metadata
TitleOdziv plinsko-turbinske lopatice na harmonijsko gibanje podloge
Title (english)Response of the gas-turbine blade to the harmonic motion of the base
AuthorIvan Lakoseljac
MentorSanjin Braut (mentor)
Committee memberIgor Bonefačić (predsjednik povjerenstva)
Committee memberSanjin Braut (član povjerenstva)
Committee memberRoberto Žigulić (član povjerenstva)
GranterUniversity of Rijeka
Faculty of Engineering
Rijeka
Defense date and country2024-09-19, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom radu provedena je analiza odziva plinsko-turbinske lopatice na harmonijsko gibanje podloge. Kao osnova analize, opisana je teorija vibracija s posebnim naglaskom na vlastitu frekvenciju i harmonijski odziv. Također je prikazana osnova o plinskim turbinama. Analiza vibracijskih karakteristika lopatice provedena je u softveru Ansys, korištenjem metode konačnih elemenata, koja je ukratko opisana. Modalnom analizom dobiveni su podaci o vlastitim frekvencijama i oblicima vibriranja lopatice, što je osnova za daljnje dinamičke analize. Nakon toga provedena je analiza harmonijskog odziva, pri čemu je kao amplituda pobude podloge korištena akceleracija ekvivalentna različitim faktorima gravitacijske sile. Time su identificirana kritična područja koja se javljaju na rubu lopatice i pri njezinu korijenu, na konveksnom dijelu. U konačnici, mreža konačnih elemenata je dodatno optimizirana na kritičnim mjestima kako bi se povećala točnost rezultata. Ovaj rad pruža bazu za daljnja istraživanja u dinamičkoj analizi turbinskih lopatica, s ciljem izbjegavanja rezonancije te poboljšanja vijeka trajanja i pouzdanosti lopatica plinskih turbina.
Abstract (english)
This paper analyzes the response of a gas turbine blade to harmonic motion of the base. As the foundation of the analysis, vibration theory is described with a particular focus on natural frequency and harmonic response. The fundamentals of gas turbines are also presented. The analysis of the blade's vibration characteristics was performed using Ansys software and the finite element method, which is briefly described. Modal analysis provided data on the blade’s natural frequencies and vibration modes, forming the basis for further dynamic analyses. Subsequently, a harmonic response analysis was conducted, where the base excitation amplitude was represented by acceleration equivalent to different factors of gravitational force. This identified critical areas occurring at the edge of the blade and at its root, on the convex part. Finally, the finite element mesh was further optimized at critical points to improve the accuracy of the results. This paper provides a foundation for further research in the dynamic analysis of turbine blades, aiming to avoid resonance and improve the lifespan and reliability of gas turbine blades.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:190:158801
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Created on2024-09-18 23:20:52