Search for dissertations about: "Rotordynamics"
Found 4 swedish dissertations containing the word Rotordynamics.
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1. Non-stationary rotor vibrations due to assymmetric temperature from skew heating in bearings and seals
Abstract : The genesis of this thesis is physical observations of slow alterations of synchronous rotor vibrations over time. It can lead to problems such as difficulties in performing proper balancing and unacceptably high vibration levels. The cause is often asymmetric heating of the rotor shaft. READ MORE
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2. Concept evaluation and contact problems in simple rotordynamical systems
Abstract : Rotating machines serves an important role in many different applications. Extensive research has been made, manly during the last century, in order to develop these systems and understand the dynamics. The theory of rotordynamics differs in many fundamental aspects from structural dynamics and is therefore usually treated as an own research area. READ MORE
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3. Modelling and analysis of hydropower generator rotors
Abstract : In almost all production of electricity the rotating machines serves as an important part of the energy transformation system. In hydropower units, a hydraulic turbine connected to a generator converts the potential energy stored in the water reservoir into electrical energy in the generator. READ MORE
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4. Modelling and analysis of multiphysical interactions in hydropower rotor systems
Abstract : In this thesis the objective is to develop rotordynamical models of hydropower units, where coupling between mechanical, electromagnetic and fluid dynamical system systems is of certain interest. Both fluid-rotor and electromechanical interactions are known to change the system coefficients of the rotor system, which affects eigenfrequencies, damping, stability and response. READ MORE
