Determination of the form of loss the freight cars stability taking into account the gap in the rail track

Derailments of freight cars occur for various reasons: breakdown equipment or individual parts; maintenance deviations in the track superstructure; incorrect order passing and making-up trains; violation normal dynamic conditions, which occurs due to hunting unfavorable traffic conditions on a curved section. In avoid derailments ensure stability coefficient, restrictions expressed using certain indicators are set. These determine lifting wheel above rail head, overturning widening railway track. One most widely used is restriction terms ratio lateral force acting vertical force.Rolling stock derailment when flange rolled onto as rule, facilitated by longitudinal compressive forces.The presence forces train results unloading wheels moving along outer line, overloading inner line.The loss part should be divided into two stages: body suspension springs set, directly derailment.
 The work aimed study influence quasi-static arising during stationary modes movement form cars’ instability. relevance this relates need control movement, taking account increase speeds, masses lengths trains, especially locomotives power increase. use methodology will improve rolling stock, justify cause derailment, well develop put practice technical measures prevent lift carriages, shear