Sökning: "Jan-olov Aidanpää"
Visar resultat 11 - 12 av 12 avhandlingar innehållade orden Jan-olov Aidanpää.
11. Coupled vibrations in horizontal and vertical rotor-bearings systems
Sammanfattning : For dynamical systems having several degrees of freedom, motion in one direction can induce motion in the other and/or vice versa. This means that there is a certain coupling between these two motions. Coupling can in some cases be a source of instability that causes self-excited vibrations in rotating machinery. LÄS MER
12. Cases of coupled vibrations and prametric instability in rotating machines
Sammanfattning : The principal task in this research project was to analyse the causes and consequences of coupled vibrations and parametric instability in hydropower rotors; where both horizontal and vertical machines are involved. Vibration is a well-known undesirable behavior of dynamical systems characterised by persistent periodic, quasi-periodic or chaotic motions. LÄS MER