Study On Traffic Flow For Container Port Area Based On Principles Of Hydrodynamics And Entropy

With its more advantages in the transportation process and the ever-increase on the goods suitable for container, the container port occupies an important position in the economic development of different countries around the world. Therefore, container throughput has been the most prime criteria evaluating the competitive competence of a harbor. However, there are, at present, some universal problems concerning about the ports of container, such as over-loaded traffic flow, the heavy port blocking, both of which mainly resulted from the inappropriate planning about collecting and distributing system of port area involved, many vessels waiting in line, as well as the problem of transportation of goods that affects the increasing of the throughput of a port. On the other hand, lots of well-known container harbors home or abroad locate mostly along the developed coastal areas where an inch of land is worth an inch of gold, the land resources are more than precious. Hence, it is of urgent question about how to make the port traffic going smoothly, guaranteeing the port capacity on the basis of rational utilization of land resources.Up to now, the study on traffic flow lie in its primary stages, which are accordingly divided into two aspects as follows: 1. Relative isolation of research content. Although various of results achieved from different perspectives, the current researchers still limit their study in a single way regardless of its inner connections. 2. Unvaried study method. Many scholars expanded the subject from the view of management science, according to which, the flow mode was firstly assumed to be stable, and the optimization of this method will be going next. This kind of method, despised of the natural flow attributes for traffic flow, thus can not completely give the way to the perfect state of containers.This paper differs from the former researches in terms of content and method related. Putting into study the yard and road system of containers as a whole will be the prominent feature, especially the blank of this field, because it takes for granted that there is an interior relationship between yard and arrangement of container port area and the importance of coordinativity between the both above as well, which so far has not yet found any records in the engineering and technology regulations.This thesis, with its marked innovation of this subject, tends to apply the principles of entropy and hydrodynamics to the relevant analysis on the yard-road system. It firstly puts forward the relevant relationship between traffic flow and conceptual system of hydrodynamics in terms of the theory of classical hydrodynamics stimulation and study; secondly, employed by the law of conservation and momentum theory, it further carries out an analysis on the flow and the discrimination from varied fluid, which consequently leads to the optimal length expression that maintains the maximum capacity on the port road. This paper also adopts the dense traffic flow density distribution assumption, which paves the way for the problem of space integral through the application of geometric principle.This thesis, on one hand, introduces the entropy theory to the description of the order degree of yard system, on the other hand, uncovers the non-linearity relationship between the piling rate and the quantities of gates in the container yards by use of the model from Lotka-Volterra to get eventually the threshold value of the piling rate.The way that connecting both the yard and the road in container port area through the gate can not only correspond with the current arrangement of the area but associate with every index related to yard and road, hence, discovering the calculation method for the arrangement of the container port area is very useful and important. At the same time, the gratifying results were gained through large amount of data testified in container ports of Qingdao.Lastly, the conclusion of this paper supplies the yard-road system in container port areas with the theoretical-based calculation as well as the guiding significances or the reference to the planning and operation of port in the future.