National Repository of Grey Literature 153 records found  beginprevious144 - 153  jump to record: Search took 0.00 seconds. 
Experimentální studie-Vyloučení nadměrných vibrací kapalinovým tlumičem
Pirner, Miroš ; Urushadze, Shota
The new type of passive tuned liquid damper (TLD), which relies on the motion of liquid inside a movable rectangular tank with two degrees of freedom (horizontal displacement and rotation).The authors study the influence of vessel horizontal motion of and rotation on the damping of the vertical and horizontal vibrations of the footbridges.
To the analysis of linear and nonlinear damping in gearing systems with impacts
Hortel, Milan ; Škuderová, Alena
The point of contribution consists in the analysis of linear and nonlinear – cubic - damping influence on the dynamic properties of the specific case of pseudoplanetary system with split power flow. The damping in the area of tooth backlash in the course of tooth face contact loss and consecutive contact with impact is assumed zero. The results of solution are illustrated in 3D space in the form of the phase planes of relative motion in gear mesh in relation to the given damping.
Linear and nonlinear damping in dynamics of gear mesh of kinematic pairs with impacts
Hortel, Milan ; Škuderová, Alena
The aim of the contribution is to point both qualitative and quantitative at problems of the damping of dynamic phenomena in nonkonservative nonlinear parametric systems - in the gear mesh including impacts that are caused by technological lateral backlash and to give that way certain suggestion for hitherto missing experimental research in this area.
Numerická simulace termo-mechanických procesů v kmitajících pryžových segmentech
Pešek, Luděk ; Půst, Ladislav ; Vaněk, František ; Veselý, Jan ; Cibulka, Jan
A mathematical model of thermo-mechanical properties including stiffness and damping rheological parameters for the nonstationary loaded resilient elastomer element was developed and applied for ascertaining of rheological parameters. The comparison of measured and numerically obtained plots temperature of sample versus time proves the applicability of mathematical model for nonstationary loading.
To issue of impact effects in planetary transmission systems with spur gears
Hortel, Milan ; Škuderová, Alena
The designing of gear systems with split power flow needs to be based on the perfect knowledge of dynamic phenomena in these light weekly and strongly nonlinear parametric systems. One in the notable dangerous effects of internal dynamics of such systems are impact effects due to tooth backlash existence in gear mesh. The contribution deals with simulation analysis of dynamic properties of impact effects in damping dependence for special case of system with split power flow.
Identification of nonlinear damping of blades
Balda, Miroslav
A method for identification of damping parameters is described, based on a nonlinear least-squares Matlab procedure.
Damping caused by interaction of limited energy source and vibrating system
Půst, Ladislav ; Škuderová, Alena
Analysis of mentioned interaction proved that it introduces strong damping into vibrating system, which itself has no internal damping. Induced damping depends on the slope of motor charakteristic and on the structure of influenced system.
Contribution to experimental research of thermo-mechanical behavior of tram wheel rubber segment
Pešek, Luděk ; Vaněk, František ; Veselý, Jan ; Cibulka, Jan
This contribution deals with press-tensile dynamic tests of tram wheel rubber segments. The evaluation of dynamic quantities was performed using hysteresis loops of force response versus loading displacement. The obtained dynamic behavior of the segments will be used for their numerical modeling in vibro-acoustic finite element tram wheel model. For research of thermo-mechanical interactions of elastomers in dynamic loadings, the inner temperatures were measured by use of single ended bead-type thermistor.
Evaluation of damping for two-component material mixture on the test samples at different temperatures
Pešek, Luděk ; Veselý, Jan ; Vaněk, František ; Cibulka, Jan
The report deals with the experimental evaluation of inner damping of a two-component mixture (NBR and NBR/BR) that is proposed for a damper production. The tests were done on two defined samples for temperature range from -40oC up to 100oC and frequency range up to 7kHz. The method of testing was proposed for the evaluation according to American standards SAE J1637 and ASTM E756-98.

National Repository of Grey Literature : 153 records found   beginprevious144 - 153  jump to record:
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