Research On Optimization Of United Transportation Of Highway And Railway Process Based On Petri Net

As Chinese economy into the new norm,domestic demand growth and industry upgrading transport demand towards the coordinated development of regional and industrial gradient shift in the direction of development,to develop the multimodal transport,especially the development of railway dominant male iron multimodal transport will gradually change the structure and spatial distribution,the optimizing transport organization mode is of great significance to promote economic growth.However,domestic and foreign experts tend to study the status quo,future development trend,advanced management experience and other aspects of the multimodal transport,while the operation process of the operation process of the multimodal transport is less involved.In this paper,the Petri net modeling method and simulation technology are applied to conduct in-depth optimization on the basis of careful investigation of the current situation of the combined transportation of public and rail,so as to optimize the organizational process and reduce the process cycle.Combined with the characteristics of low cost of railway transportation and flexible and efficient highway transportation,the multimodal transport has solved the problem of the last kilometer to some extent,which is the new trend of logistics development in the future.This paper systematically introduces the theories related to multimodal transport and Petri net.Based on the research results of the current stage of the multimodal transport,and combined with the characteristics of the multimodal transport process,the paper mainly studies and analyzes the two major parts of the sending process and arrival process of the multimodal transport.Draw the sending process and arrival flow chart of the multimodal transport of railway and railway,compare several common modeling methods,select the graphical Petri net theory,and construct the Petri net model of the multimodal transport process of railway and railway.First of all,according to the process element logical relationship analysis model structure to establish the incidence matrix,verify the model is reasonable;Secondly,qualitative analysis(structural analysis)and quantitative analysis were used to optimize the model,and the Petri net model was re-established to verify the rationality and effectiveness of the Petri net model.Finally,Tina software was used to simulate the Petri net model before and after optimization,and the simulation data was compared and analyzed.Finally,it is verified that the optimized process is effective and achieves the purpose of reducing the cycle time of the optimized transportation organization process.This paper has a certain guiding effect on the optimization process and improvement of multimodal transport,but also has some limitations.