Search for dissertations about: "rom"

Showing result 1 - 5 of 96 swedish dissertations containing the word rom.

  2. 1. Development and Validation of a Numerical Tool for the Aeromechanical Design of Turbomachinery

    Author : María Angélica Mayorca; Torsten Fransson; Damian Vogt; Eric Seinturier; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aeromechanical design; turbomachinery; numerical tool; reduced order modeling; mistuning; ROM; aero-structure coupling; CFD; FEM; methods; Mechanical energy engineering; Mekanisk energiteknik;

    Abstract : In aeromechanical design one of the major rules is to operate under High Cyclic Fatigue (HCF) margins and away from flutter. The level of dynamic excitations and risk of HCF can be estimated by performing forced response analyses from blade row interaction forces or Low Engine Order (LEO) excitation mechanisms. READ MORE

  4. 2. Sensitivity of Aeroelastic Properties of an Oscillating LPT Cascade

    Author : Nenad Glodic; Damian Vogt; Matthew Montgomery; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flutter; aeroelastic response; combined modes; bending-torsion flutter; mode superposition; aerodynamic asymmetries; ROM; probabilistic analysis;

    Abstract : Modern turbomachinery design is characterized by a tendency towards thinner, lighter and highly loaded blades, which in turn gives rise to increased sensitivity to flow induced vibration such as flutter. Flutter is a self-excited and self-sustained instability phenomenon that may lead to structural failure due to High Cycle Fatigue (HCF) or material overload. READ MORE

  5. 3. Knee contracture in children with cerebral palsy

    Author : Erika Cloodt; Lund Ortopedi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cerebral palsy; contracture; knee; ROM; muscle length; reliability; children;

    Abstract : .... READ MORE

  6. 4. Development of Accurate Reduced Order Models in a Simulation Tool for Turbomachinery Aeromechanical Phenomena

    Author : Mauricio Gutierrez Salas; Björn Laumert; Paul Petrie-Repar; Damian Vogt; Carlos Martel; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flutter; forced response; high cycle fatigue; reduced order models; ROM; craig-bampton; mistuning; tuned; mistuned; cyclic; noncyclic; craig-chang; free-interface. fixed-interface; subset nominal mode; SNM; CBMS; CCMS; CCC; CBC; FEM; CMS; modal; eigen; modeshapes; aeroelasticity; aeromechanical; tool; turbomachinery; turbine; compressor; AROMA; Energy Technology; Energiteknik;

    Abstract : Modern gas turbines are still vulnerable to vibrations when operated at certain speeds. This unstable environment can lead to high cycle fatigue (HCF) and damage several of the components inside the turbine. READ MORE

  7. 5. Lighting candles before a headless Jesus : sacred heritage, heritagized sacredness, and the many journeys between categories

    Author : Helena Wangefelt Ström; Anna Foka; Federico Barbierato; Sabina Brevaglieri; Umeå universitet; []
    Keywords : HUMANIORA; HUMANITIES; sacred heritage; religious heritage; heritage; heritagization; material religion; early modern Italy; early modern Rome; early modern Venice; collections; Catholic history; early modern travelers; religious conflict; post secularism; museums; museology; heritage studies; uses of heritage; religiöst kulturarv; sakralt kulturarv; kulturarv; kulturarvifiering; materiell kultur; materialitet; tidigmodern historia; tidigmoderna Italien; Rom; Venedig; samlingar; samlande; katolsk historia; postsekularism; museologi; kulturarvsstudier; museer; tidigmodernt resande; religionskonflikt; kulturarvsbruk; museology; museologi;

    Abstract : The overarching aim of this thesis, situated within Museology and Heritage Studies, is to investigate the different modes and devices of transfer between sacredness and heritage. The research question, 'What happens in the transfer between heritage and sacredness?', is investigated as production of sacred heritage in early modern Europe and specifically Sweden, Rome, and Venice (Part I), and as uses of the sacred as heritage in different times and contexts (Part II). READ MORE