The acting direction of the force is the same as the moving direction of the vehicle, and the magnitude of the force depends on the power of the prime mover and the moving speed of the vehicle, which can be controlled by the vehicle user as required. Often called F-pull, as opposed to resistance.
According to the force transmission process, the actual locomotive traction can be divided into several types. The tangential external force produced by the force acting on the wheel circumference of a moving wheel is called wheel circumference traction; Coupler traction (or drawbar traction) refers to the traction used by the locomotive to pull the train, which is equal to the traction around the wheel MINUS the total running resistance of the locomotive.
Calculation of traction force:
The calculation of traction force is especially common in railway rolling stock, and it is one of the important performance indexes. According to the force transmission process, the actual locomotive traction can be divided into several types. The tangential external force generated by the peripheral force of a moving wheel is called peripheral traction.
Coupler traction (or drawbar traction) refers to the traction used by the locomotive to pull the train, which is equal to the traction around the wheel MINUS the total running resistance of the locomotive. According to the working state of the vehicle, the traction can be divided into starting traction, continuous traction and maximum traction.
Starting traction refers to the traction that the vehicle can emit when it starts from a static state, and its exertion is limited by adhesion; The maximum traction refers to the maximum traction that a vehicle can produce without damaging its own machinery, and its value is usually the same as the starting traction.
Refer to the above? Baidu encyclopedia-traction