Prohlížení Acta Polytechnica. 2012, vol. 52, no. 6 dle názvu

Zobrazují se záznamy 8-15 z 15

    • Massive Parallelization of Multibody System Simulation 

      Autor: Valášek , Michael; Mráz , Ladislav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with the decrease in CPU time necessary for simulating multibody systems by massive parallelization. The direct dynamics of multibody systems has to be solved by a system of linear algebraic equations. ...

    • Micromechanical Analysis of Cement Paste with Carbon Nanotubes 

      Autor: Šmilauer , Vít; Hlaváček , Petr; Padevět , Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      Carbon nanotubes (CNT) are an attractive reinforcement material for several composites, due to their inherently high strength and high modulus of elasticity. There are controversial results for cement paste with admixed ...

    • OOFEM — an Object-oriented Simulation Tool for Advanced Modeling of Materials and Structures 

      Autor: Patzák , Bořek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The aim of this paper is to describe the object-oriented design of the finite element based simulation code. The overall, object-oriented structure is described, and the role of the fundamental classes is discussed. The ...

    • Physical and Chemical Aspects of the Nucleation of Cement-Based Materials 

      Autor: Demo , Pavel; Sveshnikov , Alexey; Hošková , Šárka; Ladman , David; Tichá , Petra
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      A theoretical model of the nucleation of portlandite is proposed, and the critical size of a portlandite cluster and the energy barrier of nucleation are determined. The steady state nucleation rate and the time lag of the ...

    • Simulation of Free Airfoil Vibrations in Incompressible Viscous Flow — Comparison of FEM and FVM 

      Autor: Sváček , Petr; Horáček , Jaromír; Honzátko , Radek; Kozel , Karel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with a numerical solution of the interaction of two-dimensional (2-D) incompressible viscous flow and a vibrating profile NACA 0012 with large amplitudes. The laminar flow is described by the Navier-Stokes ...

    • Synthesis of Mechanisms by Methods of Nonlinear Dynamics 

      Autor: Valášek , Michael; Šika , Zbynek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with a new method for parametric kinematic synthesis of mechanisms. The traditional synthesis procedure based on collocation, correction and optimization suffers from the local minima of objective functions, ...

    • The Asymptotic Properties of Turbulent Solutions to the Navier-Stokes Equations 

      Autor: Skalák , Zdenek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In this paper we study the large time behavior of solutions to the Navier-Stokes equations. We present a brief survey of results concerning energy decay, and discuss a related phenomenon of the large time energy concentration ...

    • Transonic Flow of Wet Steam — Numerical Simulation 

      Autor: Halama , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The paper presents a numerical simulation of the transonic flow of steam with a non-equilibrium phase change. The flow of steam is approximated by a mixture model complemented by transport equations for moments. Proper ...