curve resistance การใช้
- The allowable gradients may be reduced on curves to compensate for the extra curve resistance.
- However his results all show curve resistance decreasing with increasing speed in conformance with this expectation.
- At higher or lower speeds, curve resistance may be a few ( or several ) times greater.
- The Russian experiments plot curve resistance against velocity for various types of railroad cars and various axle loads.
- This figure depends on the rolling resistance of the car, the grade resistance, and the curve resistance.
- In curved track ( with or without cant ), there will be curve resistance to push the trains through the curve.
- The turning radius of the train is restricted by the difference in length or distance traveled between the inside and outside rails due to curve resistance.
- Curve resistance means that the wheels on the inside rail travel a shorter distance than the wheels on the outside rail to get the vehicle around a curve.
- That curve resistance is expected to be minimized at balancing speed was also proposed by Schmidt in 1927, but unfortunately the tests he conducted were all at below balancing speed.
- These plots tend to show curve resistance increasing more rapidly with decreases in velocity below balancing speed, than for increases in velocity ( by the same amounts ) above balancing speeds.
- However, these experiments did not provide usable formulas for curve resistance, because the experiments were, unfortunately, all done on a test track with the same curvature ( radius = 955 meters ).
- Curve resistance depends on various factors, the most important being the radius and the superelevation, there will exist some speed at which there will be no sideways force on the train and where therefore curve resistance is minimum.
- Curve resistance depends on various factors, the most important being the radius and the superelevation, there will exist some speed at which there will be no sideways force on the train and where therefore curve resistance is minimum.
- For example, in the USSR, the standard formula is Wr ( curve resistance in parts per thousand or kgf / tonne ) = 700 / " R " where " R " is the radius of the curve in meters.