Sökning: "vibration distribution"
Visar resultat 16 - 20 av 42 avhandlingar innehållade orden vibration distribution.
16. The fundamentals of ultrafine grinding in vibro-energy and annular ball mills
Sammanfattning : The growing demand for ultrafine materials, the stringent quality requirements and the rising energy cost have prompted interests in the development and improvements of fine particles production techniques. The methods of producing fine particles are summarized in this thesis. LÄS MER
17. Controlling Forced Response of a High Pressure Turbine Blade
Sammanfattning : Vibration induced High Cycle Fatigue (HCF) is a major consideration in designing gas turbines. Indeed, the Gas Turbine manufacturer must demonstrate that the vibration level of the turbomachinery blading is acceptably low, usually by using an engine strain gauge test. LÄS MER
18. Flutter in sectored turbine vanes
Sammanfattning : In order to eliminate or reduce vibration problems inturbomachines without a high increase in the complexity of thevibratory behavior, the adjacent airfoils around the wheel areoften mechanically connected together with lacing wires, tip orpart-span shrouds in a number of identical sectors. Although anaerodynamic stabilizing effect of tying airfoils together ingroups on the whole cascade is indicated by numerical andexperimental studies, for some operating conditions suchsectored vane cascade can still remain unstable. LÄS MER
19. Detection of blade icing and its influence on wind turbine vibrations
Sammanfattning : Wind turbine installations in extreme conditions like cold climate have increased over thelast few years and expected to grow in future in North America, Europe, and Asia regions due to good wind resources and land availability. Their installed capacity could reach 186 GW by the end of 2020. LÄS MER
20. High Resolution Tip-Enhanced Raman Images of Single Molecules from First Principles Simulations
Sammanfattning : With the precise control of spatially confined plasmon (SCP), tip-enhanced Raman spectroscopy (TERS) has achieved sub-nanometer resolution, leading to the chemical and physical characterization of the single molecule by optical Raman images. In the high resolution TERS measurements, the SCP spatial distribution generates the position-dependent Raman images. LÄS MER