Research On Hydraulic Support Top Beam Dangerous Section Fatigue Reliability Prediction Method

As the important supporting equipment,hydraulic support is one of the crucial factors to ensure safety in production.Its reliability concerns the production safety of fully mechanized working face.In order to ensure that the three machines work safely and efficiently,we need to know the reliability of hydraulic support every moment so that the hydraulic support can be maintained timely,and the reliability of hydraulic support can be kept at a high level.So,we need to carry out the hydraulic support reliability research.Reliability prediction is the basis of reliability engineering.This paper mainly studied the dangerous section fatigue reliability prediction method of hydraulic support top beam.Due to the external load position of roof beam is influenced by the roof breakage degree,therefore,under the condition of different roof breakage degree,the impact of different external load position on top beam stress was analyzed through the orthogonal experiment,Thus the dangerous section of top beam was discovered.On the basis,the reliability loading test of top beam in dangerous working condition was studied.Then,the data processing method of reliability test and the statistical processing method of top beam structure fatigue strength were analyzed.Combining top beam dangerous section stress probability distribution with fatigue strength probability distribution,analyses the prediction method of hydraulic support top beam dangerous section reliability using "Stress-strength interference model".Based on the research on the reliability of the hydraulic support in service,a method is presented to predict the reliability of the existing hydraulic support in the case of the maintenance time data is small sample.