|
| |
|
| |
|
| |
|
|
Efect of loading force at aerodynamic
Půst, Ladislav ; Kozánek, Jan
The aerodynamic bearings belong among modern elements of high-speed rotation machinery. Particularly in chemical and food industry, as it excludes the undesirable damage of products by oil. The theoretical solution of bearing dynamic characteristics, including motion of tilting pads, is not yet completely elaborated. This contribution completed the works done in project GACR by a study of influence of loading on dynamic properties and motion of journal at unbalance excitation. Differential equations of motion of the rotor are derived, numerically solved and time histories of journal motion and their plane trajectories are presented.
|
|
| |
|
| |
|
|
Dynamic and stability properties of an aeroelastic model
Horáček, Jaromír ; Kozánek, Jan ; Veselý, Jan
Frequency modal and damping characteristics of an aeroelastic model designed for experiments in the wind tunnel are studied. Based on the experimental modal analysis the structural mass damping and stiffnes matrices of the model are determined by identification procedures. The stability boundaries, i.e. the critical flow velocity for the flutter instability of the model were measured in the wind tunnel.
|
|
|
Vliv charakteristik elektrických motorů na dynamické chování poháněných soustav
Půst, Ladislav
The more precise mathematical models of dynamic systems must contain also more exact description of source of excitations. The paper deals with the analysis of electric motors characteristics and of interaction of motor with limited driving power and excited system. The moment charcteristic M(xxx) of the motor introduces new nonlinear effcts into the whole system and causes more complicated responses.
|
|
| |
|
| |
guest ::
