Search for dissertations about: "Forced Response"

Showing result 11 - 15 of 88 swedish dissertations containing the words Forced Response.

  2. 11. Reduction of Aerodynamic Forcing inTransonic Turbomachinery : Numerical Studies on Forcing Reduction Techniques

    Author : Florian Fruth; Torsten Fransson; Damian Vogt; Ronald Mailach; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forced Response; Aerodynamic Forcing; Efficiency; Blade Count Ratio; Clocking;

    Abstract : Due to more and more aggressive designs in turbomachinery, assuring the structural integrity of its components has become challenging. Also influenced by this trend is blade design, where lighter and slimmer blades, in combination with higher loading, lead to an increased risk of failure, e.g. in the form of blade vibration. READ MORE

  4. 12. Two-Dimensional Signal Root Estimation in Blind Multichannel Impact Response Analysis

    Author : Joakim Axmon; Matematisk statistik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; forestry; Silviculture; detection of decay.; Norway spruce; X-texture mode; signal subspace enhancement; partial forward-backward averaging; ESPRIT; state-space; Prony; frequency analysis; SIMO; impact response; Modal analysis; impact excitation; forestry technology; Skogsvetenskap; skogsbruk; skogsteknik; Electrical engineering; Elektroteknik; Signal processing; Signalbehandling;

    Abstract : This doctoral dissertation concerns two-dimensional frequency estimation for modal analysis of single-input multiple-output impact responses from circularly cylindrical objects. The application is within detection of internal defects in trunks of spruce. READ MORE

  5. 13. The 2005 Hurricane Katrina response failure : Seeing preparedness for foreseeable complex problems through a neo-institutional lens

    Author : Christer Brown; Bertjan Verbeek; Fredrik Bynander; Ira Helsloot; Bengt Sundelius; Kerstin Eriksson; Försvarshögskolan; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Statsvetenskap med inriktning mot krishantering och internationell samverkan; Statsvetenskap med inriktning mot krishantering och internationell samverkan;

    Abstract : Governmental organisations often fail to prepare themselves adequately for complex problems such as natural disasters. This is remarkable because these threats are usually studied intensively and governments do develop plans for such situations. READ MORE

  6. 14. Classroom noise : exposure and subjective response among pupils

    Author : Pär Lundquist; Rauno Pääkkönen; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; school; teaching; students; annoyance children; sound; mood;

    Abstract : In Sweden, all children must have access to education of equal value and the curriculum points out the importance of a good environment for development and learning. Modern working methods differ a lot from the traditional. Teaching nowadays is focused on problem-solving. Students are more interactive, working in groups and projects. READ MORE

  7. 15. Aerodynamic Design and Aeromechanical Analysis of Mixed and Radial Flow Turbines : A study on meanline method, stator tilting endwall design and forced response analysis

    Author : Yang Gao; Andrew R. Martin; Jens Fridh; Damian Vogt; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbomachinery; CFD; aerodynamics; aeromechanics; mixed flow turbine; Energy Technology; Energiteknik;

    Abstract : In this energy transition era, turbocharging is still an important technology for the automotive industry to reduce fuel consumption and lower emissions in its vehicles. This importance can be seen from both conventional fossil-fuel powertrains, and emerging applications, such as increased utilization of biofuels along with hydrogen fuel cells. READ MORE