Sökning: "Icke-linjära finita element analys"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden Icke-linjära finita element analys.

1. 1. Finite Element Analysis of Stresses in the MIST CubeSat due to Dynamic Loads During Launch

   Master-uppsats, KTH/Lättkonstruktioner

   Författare :Carl Järmyr Eriksson; [2021]
   Nyckelord :Satellite; CubeSat; Nanosatellite; Dynamic Loads; Launch Loads; Finite Element Analysis; FEA; Quasi-static Acceleration; Modal Analysis; Random Vibration; Shock Loads; satellit; CubeSat; nanosatellit; dynamiska laster; uppskjutningslaster; finita elementmetoden; FEM; kvasistatisk acceleration; modalanalys; stokastiska vibrationer; chocklaster;

   Sammanfattning : A finite element model of the CubeSat MIST was created, in order to assess the stresses that occur in the satellite in response to loads during its launch. Due to size limits of thesoftware used, simplifications had to be made to the geometry of the model. LÄS MER

3. 2. Reinforcement Layout in Concrete Pile Foundations : A study based on non - linear finite element analysis

   Master-uppsats, KTH/Betongbyggnad

   Författare :Mohammad Mustafa Angar; [2020]
   Nyckelord :Pile cap; Nonlinear finite element analysis; ATENA 3D; Reinforcement layout; Strut and tie method; Pålfundament; icke-linjära finita elementmodeller; strut and tie-metoden;

   Sammanfattning : The main topic of this thesis concerns the behavior of concrete pile cap supported by four piles with two varying positions of longitudinal reinforcements. The positions include top of piles and bottom of the pile cap. For this purpose, non-linear finite element models of a pile cap are created using software ATENA 3D. LÄS MER

4. 3. Numerical study of the effect of thermal ice loads on concrete dams

   Master-uppsats, KTH/Betongbyggnad

   Författare :Imal Zuwak; Wasseem Kordoghly; [2020]
   Nyckelord :Arch dam; Buttress dam; Concrete; Finite element analysis; Ice load; Valvdamm; Lamelldamm; Betong; Finit elementanalys; Islast;

   Sammanfattning : It is essential to understand the mechanics of ice load and how it affects concrete dams located in a cold climate, such as Sweden, where the temperature becomes sufficiently cold to freeze the surface of the reservoir. The purpose of this thesis is to study ice load distribution along concrete dams, and its response during the application of an ice load. LÄS MER

5. 4. A numerical investigation of Anderson localization in weakly interacting Bose gases

   Master-uppsats, KTH/Numerisk analys, NA

   Författare :Crystal Ugarte; [2020]
   Nyckelord :Applied mathematics; finite elements; eigenvalue solver; eigenvalue problem; Bose-Einstein Codensate; Finita elementmetoden; tillämpad matematik; Bose-Einstein kondensat; egenvärdesalgoritm; egenvärdesproblem;

   Sammanfattning : The ground state of a quantum system is the minimizer of the total energy of that system. The aim of this thesis is to present and numerically solve the Gross-Pitaevskii eigenvalue problem (GPE) as a physical model for the formation of ground states of dilute Bose gases at ultra-low temperatures in a disordered potential. LÄS MER

7. 5. Cracking in a slender concrete slab due to thermal variation

   Master-uppsats, KTH/Betongbyggnad

   Författare :Johan Mattsson; Fredrik Åman; [2019]
   Nyckelord :Concrete slab; Concrete; Finite element analysis; Cracking; Thermal variation; Seasonal temperature; Abaqus; Brigade Plus; Betonggrund; Betong; Finit element analys; Sprickbildning; Termiska laster; Omgivningstemperature; Abaqus; Brigade Plus;

   Sammanfattning : Concrete slabs used in thepulp and paper industries are often situated outdoors, which means that theslabs are exposed to temperature variations due to different weatherconditions. These temperature variations together with operational temperaturesassociated with the manufacturing process, may introduce high temperaturegradients in the concrete. LÄS MER