Sökning: "Vehicle and Maritime Engineering"

Visar resultat 1 - 5 av 50 avhandlingar innehållade orden Vehicle and Maritime Engineering.

1. 1. Static and fatigue analyses of welded steel structures some aspects towards lightweight design

   Detta är en avhandling från Stockholm : KTH School of engineering sciences

   Författare :Mansoor Khurshid; Zuheir Barsoum; Lars-Erik Lindgren; [2017]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fatigue strength; welded joints; static strength; high strength steel; Farkostteknik; Vehicle and Maritime Engineering; Aerospace Engineering; Flyg- och rymdteknik;

   Sammanfattning : The objectives of this thesis comprise of overcoming the challenges in designing lightweight welded structures such as material selection, choice of fatigue design methods, and increased performance by using improvement techniques. Material selection of welded joints is dependent on the filler and base material strengths. LÄS MER

3. 2. NOx Abatement Technique for Marine Diesel Engines - Improved Marine SCR Systems

   Detta är en avhandling från Stockholm : KTH School of engineering sciences

   Författare :Mathias Magnusson; [2014]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Water; ECA compliance.; IMO Tier III; Marine applications; Human element; NOx reduction; Sulfur dioxide; urea-SCR; Human-Machine system;

   Sammanfattning : Growing awareness of the environmental implications of nitrogen oxide (NOX) emissions, such as eutrophication and acidification on land and at sea, has contributed to the development of more stringent international NOX legislations within the framework of the International Maritime Organization (IMO). The most stringent IMO legislation, i.e. LÄS MER

4. 3. On the influence of surface roughness on rolling contact forces

   Detta är en avhandling från Stockholm : KTH School of engineering sciences

   Författare :Oskar Lundberg; Ines Lopez Arteaga; Leif Kari; Matthias Kröger; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rolling contact; Surface roughness; Contact forces; Contact modelling; Friction; Road; Asphalt; Substrate; Test-rig; Sliding; Stick–slip; Tyre; Rubber; Tread-block; Wheel–rail interaction; Vehicle and Maritime Engineering; Farkostteknik;

   Sammanfattning : Road vehicle tyres, railway wheels and ball bearings all generate rolling contact forces which are transferred within a finite area of contact between the rolling element and the substrate. Either it is visible or not for the human eye, a certain degree of roughness is always present on the contacting surfaces and it influences the generation of both vertical and lateral contactforces. LÄS MER

5. 4. Sound propagation from sustainable ground vehicles from aeroacoustic sources to urban noise

   Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

   Författare :Nicolas Pignier; Ciarán O'Reilly; Susann Boij; Gwenael Gabard; [2015]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sound propagation; sound generation; ground vehicle; aeroacoustics; aerodynamics; Kirchhoff approximation; detached eddy simulation; Ffowcs Williams and Hawkings; ljudutberdning; ljudalstring; markfordon; aeroakustik; aerodynamik; Kirchhoff approximation; detached eddy simulation; Ffowcs Williams and Hawkings; Farkostteknik; Vehicle and Maritime Engineering; Teknisk mekanik; Engineering Mechanics;

   Sammanfattning : Transportation is the main source of environmental noise in Europe, with an estimated 125 million people affected by excessive noise levels from road traffic, causing a burden of noise related diseases and having a substantial economic impact on society. In order to reduce exposure to high levels of traffic noise, two approaches are the topic of extensive research: preventing sound from propagating from roads and railways using for example noise barriers, and reducing the sources of noise themselves. LÄS MER

7. 5. Computational weld mechanics Towards simplified and cost effective FE simulations

   Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

   Författare :Ayjwat Awais Bhatti; Zuheir Barsoum; Lennart Josefson; [2015]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Farkostteknik; Vehicle and Maritime Engineering;

   Sammanfattning : It is the demand of the world’s ever increasing energy crisis to reduce fuel consumption wherever possible. One way of meeting this demand is by reducing the weight of a structure by replacing thick plates of low strength steel with thin plates of high strength steel in the structure. LÄS MER