Railway vehicle rolling vibration test bench curve passage testing method

Abstract

The invention relates to a railway vehicle rolling vibration test bench curve passage testing method. The invention provides a test bench curve simulation method by comprehensively considering stressof a vehicle and track change features in allusion to a condition that the vehicle operates on an actual curve track. The railway vehicle rolling vibration test bench curve passage testing method realizes simulation for a vehicle curve passage test through setting the wheel speed difference for test bench rolling vibration wheels, setting the rolling vibration wheels at tangent positions, settinga rolling wheel superelevation angle and applying a centrifugal force to the gravity center position of the vehicle body under the condition of considering a centrifugal force received by the vehiclein running, the track superelevation, the track inside and outside rail length difference and circular curve features of the track. The method can effectively simulate displacement changes of a contact point between the wheel and the track under curve running of the vehicle, contact features such as wheel set swinging angle, the wheel-track transverse force, the derail factor and abrasion power features. Meanwhile, the method can also simulate all omnidirectional and multi-degree-of-freedom unsmooth operating conditions brought about by transverse, vertical, bending and track gauge changes ofthe track in running of the vehicle, and the analysis data is reliable and accurate.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a rolling vibration test bench curve passing test method for railway vehicles. Background technique [0002] Curve passing performance in train operation is the most important factor that directly affects the running quality of the vehicle. The good curve passing performance of the vehicle means that the force between the wheel and rail is small when passing the curve, which not only improves the anti-derailment safety performance of the vehicle , It also reduces the force on the track and the wear of the wheel and rail, prolonging the service life of the track. Therefore, it is very important and necessary to test the vehicle curve passing performance. [0003] At present, the following methods are mainly used in the research on the curve passing test of railway vehicles: one is to do the line running test on the actual track; the other is to do the line running test on the circular trac...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of adopting the actual line test method is that: by arranging strain gauges on the rail to become a force-measuring rail, a large number of strain gauges need to be arranged; the radius of the line curve of the force-measuring rail that becomes the test section is fixed, and the vehicle runs on the test section. The speed is constant, the test condition is single, and the multi-speed and multi-curve radius test cannot be carried out

[0005] The disadvantage of using the circular track method is that it needs to build a test line, which takes up a lot of space, and it is inconvenient or even impossible to test some dynamic parameters of the running train.

However, the existing fixed test benches are mainly aimed at simulating the running conditions of the straight line of the vehicle, and a few test benches have the function of simulating the curved line, and only consider the superelevation of the curve and the length difference between the inner and outer rails of the curve, but this is different from the actual The wheel-rail contact relationship is quite different, and the impact from the unbalanced stage to the balanced stage at the beginning of the test is very large, and the wheel-rail angle of attack is obviously small, which makes the test results unsatisfactory.

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