Sökning: "vibrationer vakuumteknik akustik hydraulik Maskinteknik vacuum technology vibration and acoustic eng"
Visar resultat 16 - 20 av 45 avhandlingar innehållade orden vibrationer vakuumteknik akustik hydraulik Maskinteknik vacuum technology vibration and acoustic eng.
16. Diesel Engnine Cam and Roller Follower Tribology
Sammanfattning : Surfaces subjected to rolling and sliding contacts may suffer from contact fatigue. The cam and roller follower mechanism is a typical rolling and sliding contact. LÄS MER
17. Some Aspects of Wear and Structural Dynamics
Sammanfattning : The topic of this thesis is dynamics and wear of structures. In the six appended papers different aspects of wear and dynamics of a model system are studied. The considered system consists of a long slender rod with unilateral supports, subject to harmonic and stochastic excitation. LÄS MER
18. Numerical Modelling of Fuel Sprays
Sammanfattning : The way the fuel is introduced into the combustion chamber is one of the most important parameters for the power output and the generation of emissions in the combustion of liquid fuels. The interaction beween the turbulent gas flow field and the liquid fuel droplets, the vaporisation of them and the mixing of the gaseous fuel with the ambient air that are vital parameters in the combustion process. LÄS MER
19. Condition-Based Maintenance: Selection and Improvement of a Cost-Effective Vibration-Based Maintenance Policy for Rolling element Bearings
Sammanfattning : Modern machinery is expensive and therefore must run at high availability and effectiveness which cannot be achieved without an effective maintenance policy. Condition monitoring, (CM), techniques can be utilised to reduce or arrest the rate of deterioration of a component so increasing operating life. LÄS MER
20. Effect of water contamination on the diffused content of hydrogen under stress in AISI-52100 bearing steel
Sammanfattning : Abstract Hydrogen embrittlement is a degradation process of mechanical/tribological properties (toughness, wear etc.) of mating steel surfaces. This is caused by the presence and interaction of hydrogen with applied stresses. Therefore, it is important to quantify the hydrogen content which could be dissolved under applied stresses in steel. LÄS MER