Sökning: "initial boundary value problem"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden initial boundary value problem.

1. 1. Numerical simulation of the non-linear Schrödinger equation A comparative study based on the summation-by-parts method in space and time

   Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

   Författare :Ibrohim Hamoud; [2023]
   Nyckelord :;

   Sammanfattning : In this work, we present the numerical implementation of various time marching methods based on the summation-by-parts (SBP) method for the time integration of nonlinear dispersive systems. More specifically, we consider the nonlinear Schrödinger (NLS) equation that accepts soliton or soliton-like solution as a primary case study. LÄS MER

3. 2. Numerical Simulation of the Generalized Modified Benjamin-Bona-Mahony Equation Using SBP-SAT in Time

   Kandidat-uppsats, Uppsala universitet/Avdelningen för beräkningsvetenskap

   Författare :Vilma Kjelldahl; [2023]
   Nyckelord :Benjamin-Bona-Mahony equation; non-linear; initial boundary value problem; summation-by-parts; simultaneous-approximation-term; time integration; simulation;

   Sammanfattning : This paper describes simulations of the generalized modified Benjamin-Bona-Mahony (BBM) equation, using finite difference methods (FDM). Well-posed boundary conditions (BCs) as well as stable semi-discrete approximations are derived using summations-by-parts (SBP) operators combined with the projection method. LÄS MER

4. 3. Concept Design Improvement of Shift Fork for New Dog Clutch Actuator : Simulation driven product development approach

   Master-uppsats, Jönköping University/JTH, Industriell produktutveckling, produktion och design

   Författare :Nirmal Srinivasan; [2021]
   Nyckelord :Product development; Dynamic analysis; Equivalent-static load; Finite Element Method; Fatigue analysis; High-Pressure Die Casting; Computer-Aided Engineering; Computer-Aided Design; Topology optimization.;

   Sammanfattning : Kongsberg Automotive is developing a brand-new actuator for engaging and disengaging a clutch for different driveline applications. This master thesis research improves the concept design of the shift fork for the new Dog-Clutch Actuator using Design for Manufacturability (DFM). LÄS MER

5. 4. Conceptual Design of an Air-Launched Three-Staged Orbital Launch Vehicle

   Master-uppsats, KTH/Rymdteknik

   Författare :Måns Rasmussen; [2021]
   Nyckelord :Air-launched; Launch Vehicle; Three-staged; Rocket; Sun-Synchronous orbit; Solid propellant; Liquid propellant; Trajectory optimization; Nonlinear programming; JAS 39 Gripen; Fighter aircraft; Luftlanserad; Trestegsraket; Solsynkron bana; Fast bränsle; Flytande bränsle; Bananalys; Icke-linjär optimering; JAS 39 Gripen; Jaktflygplan;

   Sammanfattning : The objective of this study was to design a launch vehicle capable of deploying a nanosatellite into a Sun-synchronous orbit at 500 km orbital altitude from the JAS 39E/F Gripen fighter aircraft. This was achieved by first performing theoretical calculations for the required nozzles and solid propellant grain configurations for the first two solid stages, followed by the necessary liquid propellant configuration for the third stage. LÄS MER

7. 5. Stability and accuracy for difference methods using asynchronous processors

   Master-uppsats, Linköpings universitet/Matematiska institutionen; Linköpings universitet/Tekniska fakulteten

   Författare :Albin Göransson; [2018]
   Nyckelord :asynchronous problems; partial diffrence equations; initial boundary value problems; parallel computing;

   Sammanfattning : We solve initial boundary value problems with information unavailable at random time-steps. The randomly unavailable information represents asynchrony between processing elements. To approximate the initial boundary value problem, finite difference operators with summation-by-parts proper-ties and weak boundary procedures are used. LÄS MER