Određivanje ukupnog otpora sistemske serije brzih brodova primjenom metode Savitsky

undergraduate thesis

• Title (english): Estimation of total resistance for a systematic series of planing hulls using the Savitsky method
• Author: Dora Mihalić
• Mentor: Nastia Degiuli (mentor)
• Mentor: Ivana Martić (komentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2025-02-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Shipbuilding; Hydromechanics of Floating and Maritime Structures

Abstract

U ovom završnom radu provedena je analiza primjenjivosti i točnosti metoda Savitsky i
Radojčić za određivanje ukupnog otpora i kuta trima brzih brodova u okviru preliminarnog
projekta. Ukupni otpor i kut trima izračunati su za modele brodova razvijene u okviru
sistematske serije „Naples Systematic Series“ za koje su dostupni eksperimentalni rezultati.
Dan je pregled proračuna ukupnog otpora i kuta trima prema obje metode uz navedena
ograničenja primjene. Rezultati dobiveni u širokom rasponu brzina prikazani su tablično i
grafički uz detaljnu analizu dobivenih odstupanja u odnosu na eksperimentalne rezultate.
Rezultati pokazuju kako je primjenom obje metode moguće procijeniti ukupni otpor broda sa
zadovoljavajućom točnošću, posebice pri nižim brzinama plovidbe, dok su dobivena odstupanja
za kut trima nešto izraženija.

Abstract (english)

This thesis evaluates the applicability and accuracy of the Savitsky and Radojčić methods for
determining the total resistance and trim angle of high-speed vessels in the preliminary ship
design phase. The total resistance and trim angle were calculated for ship models from the
"Naples Systematic Series," for which experimental data is available. A comprehensive
overview of the calculation procedures for both methods is provided, along with their respective
limitations. The results, covering a wide range of speeds, are presented in both tabular and
graphical formats, accompanied by a detailed analysis of the deviations relative to experimental
findings. The study confirms that both methods can estimate total resistance with satisfactory
accuracy, particularly at lower speeds, while deviations in the predicted trim angle are more
pronounced.

• Keywords: brzi brodovi; ukupni otpor; kut trima; metoda Savitsky; metoda Radojčić
• Keywords (english): planing vessels; total resistance; trim angle; Savitsky method; Radojčić method
• Language: croatian
• URN:NBN: urn:nbn:hr:235:969757
• Study programme: Title: Naval Architecture; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka brodogradnje (sveučilišni prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka brodogradnje)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2025-02-24 10:42:17