Research On Railway Freight Loading And Reinforcement State Under Humping Condition

Hump running is an important part of railway freight shunting operation.In recent years,it is common for vehicles to be clamped on the slope due to the failure of hump reducer,the clamping force of left and right wheel sets is uneven,or the braking force is invalid.The above situation may cause the loaded goods to produce large inertia force and torsion force,which will have a certain impact on the reliability of the loading reinforcement scheme.At present,there is no relevant literature to systematically study the impact under this working condition.Therefore,it is urgent to study the loading and reinforcement status of goods under various working conditions that may be encountered in Hump sliding,so as to ensure that the developed loading and reinforcement scheme can withstand the impact of inertia force caused by sliding operation.Based on the analysis of the interaction between goods vehicle track reducer,the dynamic simulation software is used to es Tablish a model.Through the simulation test,the effects of clamping,unbalanced clamping and overspeed coupling conditions on the cargo loading and reinforcement state during hump sliding are studied.The main research contents are as follows:（1）Through investigation data and theoretical analysis,the composition structure and working principle of hump and reducer are studied.On the basis of calculating the theoretical splint braking force of reducer,the model of hump and reducer is es Tablished by simplifying the force element model;Based on the analysis of the structure of C70 general gondola car,the model topology is drawn,the K6 bogie and car body model are es Tablished,and the reliability of the vehicle model is verified;Through the theoretical calculation of loading reinforcement,the loading reinforcement scheme is formulated,and the force element simulation model simulating flexible reinforcement and rigid stop is es Tablished.（2）Design the simulation test of gear reducer clamping and unbalanced clamping conditions.Taking the normal sliding data as the control group,by controlling the increase,decrease or failure of the braking force of the reducer,the three working conditions of the first part clamping,the second part clamping and the unbalanced clamping of the reducer are simulated.By analyzing the simulation test data,it is concluded that the bearing capacity value of the reinforcement material of the goods under the clamping and unbalanced clamping conditions of the two part reducer is less than the theoretical calculation value,and the bearing capacity value of the reinforcement material of the goods under the clamping and parking conditions of the vehicle of the one part reducer is linearly related to the braking force of the reducer.Under the maximum braking force of the reducer,the bearing capacity value of the reinforcement material is still less than the theoretical calculation value,but it is close.（3）Design the simulation test of overspeed coupling series.The possible coupling speed range is determined through simulation sliding,and 20 groups of simulation tests are run to obtain the data of the bearing capacity of the cargo reinforcement scheme when the fully loaded 70 t vehicle and the billet loaded vehicle are coupled with the test vehicle respectively.The relationship between the inertia force of goods under two coupling conditions is analyzed,and the coupling speed range that will not affect the reliability of the reinforcement scheme is given.