Optimization Research On Running Organization Of Railway Out-of-gauge Freight Trains

Speed and loading limitation for road transportation pushes goods, especially out-of-gauge and over-weight goods back to railway transportation. Large quantity of out-of-gauge freight trains interfere the regular transportation seriously, which becomes the obstacle for the development of railway transportation capacity. The running organization of out-of-gauge freight trains is a complex engineering system. Along with the national railway fast-network progressive forming, the interference mechanism, running decision-making optimization, influence on transportation capacity lost caused by out-of-gauge freight trains running on single and double lines are fully studied. This study helps to construct the theoretical system of out-of-gauge and over-weight freight transport organization and enhance efficiency for out-of-gauge freight trains running which has great theoretical and practical value. Thus, with step-down thinking, the paper explores running organization of railway out-of-gauge freight trains, from the following aspects:(1) Out-of-gauge freight trains running organization status and running processes are fully analyzed. Also, the calculate methods for overtaking and non-intersection stop-time with different styles are put forward. Then, the influence of overtaking, non-intersection and limit speed running on capacity of through train traffic and railway transportation capacity are all analyzed systematically. Thus, the out-of-gauge freight trains running interference mechanism is clarified and its basic features are also explored actively.(2) Running decision-making Optimization Problem of railway out-of-gauge freight trains are analyzed systematically. A comprehensive outline algorithm for out-of-gauge freight trains loading is designed. The primary evaluation conditions set and classical domain matter-element of loading reinforce example matching for out-of-gauge freight trains are both constructed. Then, loading reinforce example matching theory for out-of-gauge freight trains is designed. Also, running decision-making optimization algorithm of out-of-gauge freight trains are put forward to solve out-of-gauge freight trains running decision-making optimization problems effectively.(3) Similar-double-track and multi-train running problem is put forward and single line train running renew-rules are designed. Also, unit cells status before and after out-of-gauge freight trains overtaking are analyzed deeply. Then, railway trains running simulation model for single line, as well as single line transportation capacity lost evaluation model are constructed. The evaluation theory for single line transportation capacity lost and calculation method for carrying capacity of station throat are both put forward to clarify transportation capacity lost mechanism caused by out-of-gauge freight train running on single line.(4) Double-line train running renew-rules are designed, and train running simulation model with double lines based on CA, as well as the evaluation model and algorithm for the transportation capacity lost on double lines are all constructed. Then, the evaluation principle for double lines transportation capacity lost is put forward to clarity its influence on transportation capacity caused by out-of-gauge freight train running and location for non-intersection district. Thus, the transportation capacity lost mechanism caused by out-of-gauge freight train running on double lines is clarified.(5) Design principles of out-of-gauge freight trains running decision-making and capacity evaluation system are given. Also, three-level system construe and relatively data organization structure are designed based on B/S mode. Besides, railway gauge management, running decision-making management and capacity lost evaluation sub-systems realization methods are all put forward to develop the system based on B/S mode.