Modalna analiza podvozja lakog zrakoplova

master's thesis

• Title (english): Modal Analysis of the Light Aircraft Landing Gear
• Author: Fabijan Juretić
• Mentor: Anita Domitrović (mentor)
• Committee member: Ernest Bazijanac (predsjednik povjerenstva)
• Committee member: Davor Franjković (član povjerenstva)
• Committee member: Karolina Krajček Nikolić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Transport and Traffic Sciences; (Division of Aeronautics); (Department of Aeronautics); Zagreb
• Defense date and country: 2022-09-22, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Traffic and Transport Technology; Air Traffic

Abstract

Vibracije predstavljaju bitnu komponentu u konstruiranju a kasnije i u eksploataciji većine strojeva pa tako i zrakoplova. Stoga je razumijevanje na koji način vibracije djeluju na strukturu od velike važnosti kako bi se stroj poput zrakoplova sigurno konstruirao i održavao. Ovaj diplomski rad usmjeren je ka proučavanju vibracija kroz modalnu analizu glavnog podvozja lakog zrakoplova Cessna 172 (C-172). U radu su prezentirani osnovni pojmovi koji su potrebni za razumijevanje analize. Zatim je prezentiran zrakoplov čije je glavno podvozje analizirano. Analizirane su vibracije na podvozju zrakoplova C-172, skupa s teorijskom razradom jednadžbi kojima se može opisati podvozje i izračunati veličine potrebne za modalnu analizu. Zatim je provedena modalna analiza putem računalnog programa Ansys. Dobiveni rezultati evaluirani su na temelju vibracija snimljenih u eksploataciji. Također rezultati modalne analize uspoređeni su s podacima iz eksploatacije nakon čega su dani zaključci.

Abstract (english)

Vibrations represent important component in construction and in operation of most machines, including aircraft. Therefore, understanding how vibrations affect structure is of great importance in order to safely construct and maintain aircraft. This thesis is aimed at study of vibrations through a modal analysis of the main landing gear of Cessna 172 (C-172) aircraft. The paper presents basic terms that are necessary for understanding the analysis. Then, the aircraft whose main landing gear was analyzed was presented. The vibrations on the landing gear of the C-172 aircraft were analyzed, along with the theoretical development of equations that can be used to describe the landing gear and calculate the quantities needed for modal analysis. Then a modal analysis was performed using a computer program Ansys. The obtained results were evaluated based on vibrations recorded during operations. Also, the results of the modal analysis were compared with data from operations, after which conclusions were given.

• Keywords: modalna analiza; vibracije; podvozje; računalna analiza
• Keywords (english): modal analysis; vibration; landing gear; computer analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:119:188953
• Study programme: Title: Aeronautics; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka aeronautike (magistar/magistra inženjer/inženjerka aeronautike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-12-09 15:20:16