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Minimization of vibration of rotating systems during critical states using torsional vibration dampers - test bench concept

Jakub Wiekiera

Abstract

Rotor-dynamics is the main subject of this study. Coupled rotational and lateral motion was described with particular emphasis. In order to have an exhaustive presentation of the considered phenomena, an extensive theoretical introduction was formulated. The theoretical introduction presents, among others, motion equations of rotor attached to a slender shaft. The simplified analysis of motion equations allowed for some general finds to be drown. The findings were confirmed by the results of numerical simulations. The second chapter reviews the basic of stability theory. It also contains a brief commentary of the considerations presented in the theoretical induction. The third chapter contains the analysis of the dynamic vibration absorption phenomena. The principle of operation of the dynamic vibration absorber was described basing on simple models with one and two degrees of freedom. With aid of the methods of vibration theory dependences were derived allowing for turning of the dynamic vibration absorber. The influence of damping on tuned dynamic absorber was investigated. After the theoretical considerations a real torsional dynamic vibration absorber with rubber spring was introduced. The afore mentioned absorber comes from VW’s reciprocating engine. The fourth chapter presents a brief description of rubber as an engineering material, as well as equations, which might be helpful in choosing the dimensions of rubber spring. The fifth chapter contains the next stage of considerations that is proposing a general conception of the bench. The main aim was to facilitate observation of the phenomena considered in previous the parts of the study. The test bench was modeled on the system of ordinary differential equations, The dimensions and other parameters of the bench were chosen using the criterion of critical speeds. The dimensions were chosen with respect to dimensional constraints relevant to the potential location of the test bench. A series of the test bench numerical simulations were carried out. Each simulation was ended with conclusions and test bench modification. The aim of each modification was to improve the dynamical behavior of the test bench. The thesis ends with conclusions.
Record ID
WUTc69660b6f7114ace87303a523b2b8672
Diploma type
Master of Science
Author
Jakub Wiekiera (FACME) Jakub Wiekiera,, Faculty of Automotive and Construction Machinery Engineering (FACME)
Title in Polish
Wykorzystanie tłumików drgań skrętnych do minimalizacji drgań w stanach krytycznych dla układów wirujących - koncepcja stanowiska badawczego
Supervisor
Zbigniew Dąbrowski (FACME/IMDF) Zbigniew Dąbrowski,, Institute of Machine Design Fundamentals (FACME/IMDF)Faculty of Automotive and Construction Machinery Engineering (FACME)
Certifying unit
Faculty of Automotive and Construction Machinery Engineering (FACME)
Affiliation unit
Institute of Machine Design Fundamentals (FACME/IMDF)
Study subject / specialization
, Mechanika i Budowa Maszyn
Language
(pl) Polish
Status
Finished
Defense Date
22-11-2012
Issue date (year)
2012
Pages
136
Reviewers
Marek Pietrzakowski (FACME/IMDF) Marek Pietrzakowski,, Institute of Machine Design Fundamentals (FACME/IMDF)Faculty of Automotive and Construction Machinery Engineering (FACME) Zbigniew Dąbrowski (FACME/IMDF) Zbigniew Dąbrowski,, Institute of Machine Design Fundamentals (FACME/IMDF)Faculty of Automotive and Construction Machinery Engineering (FACME)
Keywords in Polish
1. Dragania giętne 2. Drgania skrętne 3. Stany krytyczne 4. Dynamiczny eliminator drgń
Abstract in Polish
urn:pw-repo:WUTc69660b6f7114ace87303a523b2b8672