Author, institution: Artūras Tadžijevas, Kaunas University of Technology
Science area, field: Technological Sciences, Mechanical Engineering
The Doctoral Dissertation is available at the library of Kaunas University of Technology (K. Donelaičio St. 20, Kaunas).
Scientific Supervisor:
Prof. Dr. Habil. Vytautas BARZDAITIS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T).
Dissertation Defence Board of Mechanical Engineering Science Field:
Prof. Dr. Rimvydas GAIDYS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T) – chairman;
Assoc. Prof. Dr. Giedrius JANUŠAS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T);
Assoc. Prof. Dr. Vytautas JŪRĖNAS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T);
Prof. Dr. Habil. Rimantas KAČIANAUSKAS (Vilnius Gediminas Technical University, Technological Sciences, Mechanical Engineering – 09T);
Prof. Dr. Juozas PADGURSKAS (Aleksandras Stulginskis University, Technological Sciences, Mechanical Engineering – 09T).
Annotation:
Doctoral dissertation consists of an introduction, four chapters, conclusions and list of cited sources. The total scope of the dissertation 141 pages, 106 figures and 90 bibliographical references.
The first chapter of doctoral dissertation analyses investigations published in scientific journals and international standards in fields of rotor dynamics and diagnostics.
In second chapter of doctoral dissertation analytical and generalized finite element models of vertical rotors described. The results of calculations are also presented.
The third section contains three independent experimental investigations. The first subchapter intended to investigate and compare the vertical and horizontal rotor dynamics and its influence to rotor with rolling bearing diagnostics. In this section a new statistical parameter DVR (defect visibility ratio) presented, which helps to compare the rotor diagnostic features.
The second subchapter of dissertation describes the experimental study of vertical and horizontal rotors with the fault of inner ring race of rolling bearing. Investigation carried out with different angular position of dynamic excitation force of imbalance and inner ring race fault. The third subsection of this chapter describes a studies of rotor inclined from the vertical dynamics and its influence to rolling bearing with outer ring race fault diagnostics. This subsection specifies how the total dynamical imbalance force, its angular position to rotor rotation axis and the size of rolling bearing spall affects the diagnostics of rotor elements faults.
The fourth section of dissertation presents the verification of generalized finite element model of vertical rotor.
In the end of dissertation the general conclusions, list of bibliographical references, list of authors published articles and annexes presented.
