Sökning: "nita elementmetoden"

Hittade 4 uppsatser innehållade orden nita elementmetoden.

1. 1. Infuence of the modelling of truss joints made of hollow tube sections in finite element models

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Mattheüs Lucassen; [2019]
   Nyckelord :Truss joints; Circular Hollow Sections CHS ; Fatigue; Finite Element Modelling FEM ; Crane; Boom section; Local joint exibility LJF ; Stress concentration factors SCF ; Fackverksled; Cirkulära ihåliga proler; Utmattning; Finita Elementmetoden FEM ; Kran; Kranarmsektion; Lokal ledexibilitet; Spänningskoncentrationsfaktorer.;

   Sammanfattning : Several boom segments form the crane boom. These segments are often truss structures formed out of circular hollow sections, which are welded together forming the truss joints. A adequate modelling of these truss joints is very important for operational strength and life. LÄS MER

3. 2. Magnet Losses in Inverter-fed High-speed PM Machines

   Master-uppsats, KTH/Elektrisk energiomvandling

   Författare :Adolfo Garcia Gonzalez; [2015]
   Nyckelord :Eddy currents; FEM 2D; FEM 3D; magnet losses; nut-runner; PM motor; slot-less winding; Virvelstrommar; FEM 2D; FEM 3D; forluster i magneter; mutterdragare; permanentmagnetiserad motor; luftlindad lindning;

   Sammanfattning : This master thesis deals with the estimation of magnet losses in a Permanent Magnet(PM) motor inserted in a nut-runner. This type of machine has interesting featuressuch as being slot-less and running at a very high speed (30000 rpm). LÄS MER

4. 3. Analysis of an Inclined Pile in Settling Soil

   Master-uppsats, KTH/Jord- och bergmekanik

   Författare :Fredrik Resare; [2015]
   Nyckelord :Batter piles; raked piles; ground settlements; induced bending moments; lutande pålar; marksättning; nita elementmetoden; påle; transversalbelastning;

   Sammanfattning : The use of inclined piles is an efficient way to handle horizontal forces in constructions. However, if the soil settles the structural bearing capacity of each pile is reduced because of induced bending moments in the pile. There are several reasons for a soil to settle, e.g. LÄS MER

5. 4. Design and Analysis of a Fractional-Slot Concentrated-Wound PM-Assisted Reluctance Motor

   Uppsats för yrkesexamina på avancerad nivå, KTH/Elektrisk energiomvandling

   Författare :Luigi Marino; [2015]
   Nyckelord :concentrated windings; demagnetization; distributed windings; ferrite; finite element method; loss distribution; natural and over compensation; overlaod; permanentmagnet assisted synchronous reluctance motors; permanent magnets; rare earth magnets NdFeB ; reluctance torque; temperature effects; torque ripple; avmagnetisering; ferrit; finita elementmetoden; fördelade lindningar; förlust distribution; koncentrerade lindningar; momentrippel; naturligt och överkompensation; permanentmagnet assisterad synkron reluktansmotorer; permanentmagneter; reluktansvridmomentet; sällsynta jordmagneter NdFeB ; temperatureffekter; överbelastning;

   Sammanfattning : The aim of this master thesis is to design and analyse a FSCW PMaSynRM (Permanent Magnet assisted Synchronous Reluctance Motor) for industrial applications. The design process includes analytical calculations (initial design and PM amount minimization) and nite element method (FEM) based design optimization. LÄS MER