Národní úložiště šedé literatury Nalezeno 136 záznamů.  začátekpředchozí125 - 134další  přejít na záznam: Hledání trvalo 0.01 vteřin. 
Motion of the dynamic impact damper
Peterka, František
Properties of the tuned dynamic impact damper is studied by numerical simulation. Different regimes of the system response on the harmonic excitation is evaluated and regions of existence and stability are ascertained. Specified behaviour as grazing, period doubling, saddle-note and Hopf bifursations are explained.
Transition from impactless into impact motion in oscillators with soft impacts
Peterka, František
This paper presents new results of the investigation of the oscillator with soft impact and triangle model of impact interactions. Transition between two types of impactless motion is expained and the influence of impact energy losses on the system dynamics in shown. Inverse grazing viburcation is defined and two types of motion with equal impact number are distinguished.
Regions of subharmonic motions of the oscillator with Hertz's model of impact
Peterka, František ; Čipera, S.
There were obtained new laws of dynamics of impact oscillators with soft impacts. They will be partially explained using oscillator with the Hertz model of soft impact. Special features of motion with soft impacts in the comparison with the motion with rigid impacts will be shown by the evaluation of regions of existence and basins of attraction of different subharmonic impact motions.
Problémy dynamiky oscilátoru s rázy řešené v r. 2000
Peterka, František
Práce souhrnně pojednává o pracech v oblasti dynamiky silně nelineárních systémů s rázy, které byly prováděny v Ústavu termomechaniky AV ČR v r. 2000.
Subharmonic and chaotic motions of the oscillator with soft impacts
Peterka, František ; Kocanda, Lubomír ; Qasmi, M.
This paper shows the behaviour of impact oscillator with soft impacts using numerical simulation of motion. Parameters of the system correspond to parameters of the experimental device.parametrům experimentálního zařízení.
The approximation of correlation dimension of strange attractors of two-masses mechanical system with impacts
Čipera, S. ; Peterka, František
The motion of the pair of bodies with the both-sides impacts and dry friction forces is considered. The Poincaré sections in phase-space of the relative motion are utilized. The correlation dimensions of strange attractors are estimated from numerically generated data with respect to the changes of the drive frequency.

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