Pohyb kolejových vozidel

Flashcards covering key vocabulary related to the forces and resistances involved in the movement of rail vehicles.

Tažná Síla (Ft)

Force acting in the same direction as the vehicle's velocity vector.

Odporové Síly (O)

Forces acting against the vehicle's velocity vector; resistances.

Brzdné Síly (FB)

Forces acting against the vehicle's velocity vector during braking.

Vozidlový Odpor (OV)

Vehicle resistance, dependent on the construction, shape and speed of the vehicle.

Traťový Odpor (OT)

Track resistance, dependent on the slope and direction of the track.

Odpor Zrychlení (OZr)

Acceleration resistance, force opposing changes to the velocity of the vehicle.

Aktivní Odpory

Resistances between the primary source of energy and the point of force realization, influenced by the vehicle's construction and independent of external factors.

Pasivní Odpory

External forces acting against the movement of vehicles, including vehicle and track resistances.

Součinitel odporu (o)

Coefficient of resistance; resistance per unit weight of the vehicle.

odpor valení kola po kolejnici

Resistance of the wheel rolling on the rail

dpor čepového tření v ložiscích

Resistance of journal friction in bearings

odpor prostředí

Environmental resistance

Sklon (s)

The slope, numerically indicating the elevation of the track in mm per 1 m of track length. Expressed in ‰ (per mille).

Fx

Force parallel to the direction of travel when a train is traveling on a gradient.

Přídavný sklon (sobl)

Additional slope to account for curves

Trakční charakteristika

The relationship between the tractive force F and the speed of the driving vehicle V.

Adheze

Adhesion enables the transfer of tangential forces in the wheel-rail contact

Adhezní tíha

The portion of the vehicle's weight that rests on the driving wheels.

Součinitel rotujících hmot ρ

Coefficient of rotating masses

Setrvačný sklon s0

The slope at which a train can maintain a constant speed, dependent on the train's characteristics.

Přebytek měrné tažné síly p

The difference between the inertial slope and the track slope