Sökning: "field mitigation"

Visar resultat 1 - 5 av 78 avhandlingar innehållade orden field mitigation.

1. 1. Vibration mitigation of high-speed railway bridges : Application of damping devices in theory and practice

   Författare :Sarah Tell; Raid Karoumi; Andreas Andersson; Ülker-Kaustell Mahir; José Maria Goicolea; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration mitigation; high-speed railway bridges; damping devices; retrofit; numerical analysis; hybrid simulation; field experiment; vibrationsdämpning; järnvägsbroar för höghastighetståg; dämpare; eftermonteringsmetod; numerisk analys; hybridsimulering; fältförsök; Structural Engineering and Bridges; Bro- och stålbyggnad;

   Sammanfattning : The dynamic response of railway bridges is an important aspect to consider, as the repetitive loading from passing trains may result in excessive vibrations of the bridge deck. Several design criteria are developed in order to assure the structural safety and passenger comfort during train crossings of a bridge. LÄS MER

3. 2. Mitigation of Power-Frequency Magnetic Fields With Applications to Substations and Other Parts of the Electric Network

   Författare :Ener Salinas; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; substation; power-frequency magnetic fields; EMC; FEM; busbars; transformers; field mitigation; eddy currents;

   Sammanfattning : In recent times, electromagnetic emissions from various electrical components have induced more than one debate whether they represent a harmful influence to our health. In addition, interferences caused by power frequency magnetic fields (PFMFs) on electron beam based electronic equipment (e.g. LÄS MER

4. 3. Disruption Mitigation in Tokamaks with Massive Material Injection

   Författare :Oskar Vallhagen; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; shattered pellet injection; fusion plasma; disruption mitigation; runaway electron;

   Sammanfattning : The sudden loss of confinement of the energy content of fusion plasmas in off-normal events, called disruptions, is among the most severe threats to the future of fusion energy based on the tokamak design. An efficient disruption mitigation system will therefore be of utmost importance for future large, high-current devices such as ITER. LÄS MER

5. 4. Phase separation in duplex stainless steel: characterization and mitigation

   Författare :Jianling Liu; Peter Hedström; Joakim Odqvist; Wangzhong Mu; Aniruddha Biswas; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; duplex stainless steel; 475 °C embrittlement; phase separation; small-angle neutron scattering; mechanical properties; alloying elements; cooling rate; magnetic field; Materials Science and Engineering; Teknisk materialvetenskap;

   Sammanfattning : Duplex stainless steel (DSS) is a category of widely used stainlesssteel, which are strategically important in a variety of applications such asin the food industry, chemical engineering plants and nuclear power plants,due to their attractive combination of mechanical properties and corrosionresistance. However, these steel grades are sensitive to the so-called ‘475°Cembrittlement’, because of a phase separation (PS) phenomenon in theferrite phase, which decomposes into Fe-rich ferrite (α) and Cr-rich ferrite(α'), when exposed to temperatures within the miscibility gap. LÄS MER

7. 5. Blue Oceans with Blue Mussels - Management and planning of mussel farming in coastal ecosystems

   Författare :Per Bergström; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coastal management; Mytilus edulis; Growth; Planning; Modelling; Predict; Restoration; Mitigation; Aquaculture; Bioturbation;

   Sammanfattning : Eutrophication is one of the largest and most serious global threats to the marine environment. The effect of eutrophication has become increasingly clear during recent time, and major economic and political efforts are being made to tackle its causes and consequences in Sweden and its surrounding seas. LÄS MER