The Operating Optimization Of Heavy Haul Train Based On The Asynchronous Control Of Main And Slave Locomotive

With the rapid development of railway transportation in the world,heavy haul railway transportation has become the main force to develop the railway transportation industry due to its advantages of huge transport volume and high transportation efficiency.However,in the actual operation of the train,a relatively large longitudinal impulse often happens.Therefore,it is of great significance to apply the simulation system to analyze the longitudinal impulse problems by using the synchronous and asynchronous control strategy of the main and slave locomotives.In this thesis,the Train Air Brake and Longitudinal Dynamics Simulation System(TABLDSS)is used to analyze the effect of the adjustment of the electric braking force of the main and slave locomotives on the coupler force when the train brakes and releases on the flat line and explores the asynchronous control strategy during braking and releasing;according to the asynchronous control strategy,explores the asynchronous control scheme of the main and slave locomotives when the train brakes on the special ramps(concave and convex ramps)and releases on the convex ramp;Finally,according to the actual operation of the train on a heavy haul railway,it is difficult to operate on this railway,and an asynchronous control optimization plan is proposed to reduce the tensile coupler force and the compressive coupler force after the train releases,and provides optimization guidance for the actual operation of the train.The train operating control strategy proposed in this thesis is: in the condition of the railway line excitation of the concave ramp,the train will be subjected to the compressive coupler force,so trains should avoid braking on concave ramp as much as possible.When electric braking is required,the asynchronous control method can be used to reduce the maximum compressive coupler force of the train.The method is that reduce the electric braking force of the main locomotive and increase the electric braking force of the slave locomotive.In the condition of the railway line excitation of the convex ramp,the train will be subjected to the tensile coupler force,so it can brake on the convex ramp;when the tensile coupler force generated by the railway line excitation is greater than the compressive coupler force generated by the brake excitation,and the train is subjected to a relatively large tensile coupler force,the asynchronous control method can be used to reduce the maximum tensile coupler force.The electric braking force of the main locomotive can be increased,and the electric braking force of the slave locomotive can be reduced.The train should avoid releasing on the convex ramp as much as possible,preventing the superposition of the tensile coupler force generated by the railway line excitation and releasing;When the train is releasing,the asynchronous control strategy can be used: the electric braking force of the main locomotive can be increased and the electric braking force of the slave locomotive can be reduced;and the synchronous control strategy can also be used the electric braking force of the main and slave locomotive can be increased.The electric braking force of the main and slave locomotives can be reduced in 10 second after the maximum tensile coupler force occurs to reduce the maximum compressive coupler force.The asynchronous control strategy is more optimized than the synchronous control strategy in reducing the maximum tensile coupler force.The asynchronous control strategy of the train can reduce the relatively large coupler force of the train after braking and releasing,and can reduce the longitudinal impulse of the train,and ensure the safe operation of the train.