Sökning: "finita-elementanalys"

Visar resultat 6 - 10 av 21 uppsatser innehållade ordet finita-elementanalys.

1. 6. HVDC transformer core resonance calculation

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Axel Thorstrand; [2021]
   Nyckelord :HVDC; High Voltage Direct Current; Transformer core; Natural frequencies; Energy method-based equation; HVDC; Högspänning likström; Transformatorkärna; Naturliga frekvenser; Energimetod;

   Sammanfattning : Transformers emit a characteristic humming noise due to magnetostriction which is the continuous change in dimensions during magnetization. The noise is amplified if the induced frequencies match the core’s natural frequencies, consequently avoiding geometries that create resonance is critical in order to fulfill customer sound level requirements. LÄS MER

3. 7. Numerical simulations of shear reinforced concrete beams subjected to blast loads

   Master-uppsats, KTH/Betongbyggnad

   Författare :Anton Frank; Andreas Fristedt; [2021]
   Nyckelord :Numerical simulations; shear reinforcement; blast loads; dynamic shear failure; Numeriska simuleringar; tvärkraftsarmering; luftstötvåg; dynamiskt skjuvbrott;

   Sammanfattning : Historical accidents and experimental investigations have made apparent that blast loaded concrete members are prone to fail in brittle shear rather than a ductile flexure mode. Air blasts from accidental detonations or explosives may cause severe damage to buildings and infrastructure and it is of great importance that load carrying members can withstand the impulse that arise to avoid progressive collapses. LÄS MER

4. 8. Finite Element Modelling of Compact Gears Using Strain Measurements

   Master-uppsats, KTH/Maskinkonstruktion (Avd.)

   Författare :Saujanya Shah; [2020]
   Nyckelord :Design of experiment for finite element analysis; grey-box modelling; scaling of stress; simulated and measured stress; Design av experiment för finita elementanalys; gråboxmodellering; skalning av spänning; simulerad och avmätt spänning;

   Sammanfattning : Robot design and development has been the backbone of industrial automation and is in the forefront of accelerated development across all areas. Robot designers have been using simulations for reducing product development lead times. LÄS MER

5. 9. Simulating Low Frequency Reverberation in Rooms

   Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWL

   Författare :Mattias Svensson; [2020]
   Nyckelord :Low frequencies; Room acoustics; Finite Difference Time Domain method; FDTD.; Rumsakustik; låga frekvenser; Finite Difference Time Domain metoden; FDTD.;

   Sammanfattning : The aim of this thesis was to make a practical tool for low frequency analysis in room acoustics.The need arises from Acad’s experience that their results from simulations using raytracing software deviate in the lower frequencies when compared to field measurements inrooms. LÄS MER

7. 10. Simulation of Hardening of the MahanaKhon Tower Mat Foundation

   Master-uppsats, KTH/Betongbyggnad

   Författare :Zakaria Kazi-tani; [2019]
   Nyckelord :Hydration; MahanaKhon tower; mat foundation; young concrete; temperature development; thermal stresses; cracking; fly ash; finite element analysis; COMSOL Multiphysics; Hydratation; MahanaKhon tower; bottenplatta; ung betong; temperaturutveckling; termiska spänningar; sprickbildning; flygaska; finita elementanalys; COMSOL Multiphysics;

   Sammanfattning : Cement hydration is the result of a series of simultaneous chemical reactions occurring during the production of concrete. An excessive amount of heat is generated, which consequently may give rise to thermal stresses and cause early age cracks in concrete that may affect its structural integrity, and load bearing capacity. LÄS MER