The height valve adjusting rod is an important part of the suspension system,
used to adjust the height of the train to adapt to the train through the curve,
slope or uneven track when the height valve adjusting rod fracture failure, the
train’s suspension system can not be adjusted normally, may lead to the height
of the train is too high or too low, affecting the stability of the train and
the driving safety. In this paper, an underground vehicle height valve adjusting
rod fracture failure of the problem was studied and analysed, the specific
conclusions are as follows: height valve adjusting rod there are two main
vibration frequency, 60Hz and 340Hz, 60Hz main frequency has always existed, and
340Hz vibration frequency are present in part of the interval, but also caused
by the vehicle vibration of the main reason for the local larger; height valve
adjusting rod stress there is also a significant vibration The main frequency of
340Hz, similar to the vibration characteristics of the vibration response, the
main frequency of vibration only exists in part of the interval, and is the main
reason for the stress is locally large; comprehensive consideration of the
vehicle vibration state and stress level, 340Hz rail grinding frequency is the
main reason for the height valve regulator vibration level and the stress level
is obviously increased, but also led to the failure of the height valve
regulator; can be achieved by grinding rail Or improve the structure of the
crossbar so that the inherent modal frequency of the crossbar is far away from
the wave abrasion frequency, which can provide a certain reference significance
for other urban rail vehicle projects to solve such problems.