Research On The Synergic Problem In Collection And Distribution System Of Heavy Haul Railway

The construction and implementation of an integrative collection and distribution system of heavy haul railway is an effective way for railway transport to completely free itself from the planned economy and adapt to the market economy. The heavy haul railway is a large-capacity transport channel, but whether the whole system will be successful or not will be determined by the efficiency and synergy of the two endpoints of this channel. This is more evident in the case of that the existing endpoints are of a chain of operations featured by multi-client and multi-technology. The integrative collection and distribution system is a manifestation of the synergy organization of collecting and distributing. The cooperative transport organization mode of the integrative collection and distribution system can diminish the deposition of vehicles and cargo caused by imbalanced cargo flows and random train arrivals. During the development of the collection and distribution system, the synergic collaboration will form a pulling effect, reduce costs and improve efficiency, which will result in that all the subjects will benefit, the overall system will be strengthened and developed. To strengthen research on the synergy of the collection and distribution system of heavy haul railway, will not only provide guidance for the constriction and implementation of the collecting and distributing system of heavy haul railway, but also will offer a strong reference to the construction of the collection and distribution system of the existing railway. This kind of research will help optimize allocation of the railway resources and significantly improve the railway transport capacity, which will have far-reaching influence and significance to promote the state economic and social development.With the funding of the project "Research on the heavy-haul capacity technology and the auxiliary support technology for freight organization in Daqin railway" and based on lots of site survey, this dissertation focuses on the in-depth study of the synergic problems in the collection and distribution system of heavy hall railway. In this dissertation research, the theories and methods of Synergetics and Transport Organization are used on the basis of summarizing and analyzing the theories and practices of the collection and distribution of heavy haul railway, and the main conclusions and innovative points are outlined as followings:The connotation, extension, content, and hierarchy of the synergy of the collection and distribution system of heavy hall railway are defined. The connotation is that collection, evacuation and transportation are taken as an integrated entirety, in which it unifies the operating procedure, the integrated presentation of the collection, evacuation and transportation plan and the implemented organizational model aiming to maximize the overall operational efficiency and maximize the overall social benefits. The extension includes equipment coordination, technical cooperation and capacity collaboration. The content includes the basic elements, operational processes, information technology, organization management, culture and security. The hierarchy contains the macroscopic, medium and microscopic levels.Different prediction methods, including the multiple regression prediction, the gray prediction and the extrapolation index, are used to predict the railway transportation volume of coal in china from2012to2016, based on the related data of railway freight volume from1989to2009in China. Moreover, this dissertation predicts China’s railway transportation volume of coal from2012to2016more accurately by means of Weight-varying Combination of Forecast Models. The prediction results show that the railway transportation volume of coal will continue to increase and the railway transportation capacity needs to be further improved for coal transportation.The principle, the environmental conditions and the driving forces of the synergic evolution of the collection and distribution system of heavy hall railway are studied. The collection and distribution system of heavy haul railway is satisfied with internal and external conditions to produce self-organization. The self-organizing activities of the system elements are the internal and decisive force for the collection and distribution system of heavy haul railway to achieve coordinated development. Transport efficiency as the order parameter gains a dominant position in the collection and distribution system of heavy haul railway and becomes the internal core of this system. The implementation of synergistic organization mode of the integrated collection and distribution will greatly improve the efficiency of transportation; therefore the result of development and evolution the system is the utilization of the synergistic organization mode of the integrated collection and distribution. The collaborative evolution equations are used to find a balance under which all the three parties of collection, evacuation and transportation in collaboration gain more benefits than not in collaborative supply chain. From economic, policy and technical perspectives, the environmental conditions for forming synergy in the collection and distribution system of heavy haul railway are analyzed. From the two aspects of self motivation and non-self motivation, the driving force of forming synergy in the collection and distribution system of heavy hall railway is analyzedThe reliability of the synergistic collection and distribution system of heavy haul railway is studied based on the fault tree and fuzzy stochastic Petri net. The collaborative reliability of the system is described, and the characteristics and reliability module of the collection and distribution system of heavy haul railway are analyzed. With the idealized assumptions and the limited conditions, the fault tree and fuzzy stochastic Petri net are used to analyze the reliability of synergies of the system.The synergy index of the three subsystems of collection, distribution and transportation of heavy haul railway is established. The evaluation method of the synergistic collection and distribution system is studied. The synergy index is divided into quantity indicators and quality indicators. The membership function coordination judgment method adapts to the evaluation of synergy degree of the collection and distribution system of heavy haul railway.The collaborative model is used to analyze the capacity of the collection and distribution system of Daqin railway. At current stage, the capacity of the collection and distribution system of Daqin railway exactly matches the target for the year of2012, which denotes the excellent collaboration. The collaboration of the collection and distribution system in its entirety is low, only with a value of0.61. The gap between the channel transport and the distribution system capacity is small, with a synergy degree of0.8, which denotes high-quality collaboration. In the collection system, the synergy degree of the loading point and the group lines is0.91, which denotes high-quality collaboration; but the synergy degree of the capability of the East Lake Station and the loading areas is only0.51, i.e. it is basically non-collaborative. The synergy degree of the capability of the collection system and the channel transportation is0.76, and it is a basic synergy. The synergy degree of the capability of the collection system and the distribution system is0.61, and it is a mild synergy.The fault tree and the fuzzy stochastic Petri net are used to study the collaborative reliability of the collection and distribution system of Daqin railway. The collaborative reliability is0.723625. After a blurring calculation of±10,±15and±20%as their upper and lower to the precise value of λ and τ, the system reliability becomes0.7218396,0.7201219and0.7166781. This denotes that using the fuzzy stochastic Petri net to analyze the reliability of the fixable system is feasible and effective.