基于比功率的高速公路交通安全和能耗模型及仿真
[Abstract]:With the development of economy and the progress of society, people pay more and more attention to the occurrence of road traffic accidents. Road traffic is a complex dynamic evolution system. It is affected by many factors such as people, vehicles, roads and environment. The study of road traffic safety evaluation is helpful to evaluate and feedback road traffic accidents in time. Real-time traffic safety in frequent road sections is conducive to restoring the smooth road as soon as possible and reducing the occurrence of subsequent accidents. Energy consumption has always been an important issue for sustainable development of human society. Under the premise of mixed traffic, it is of far-reaching significance to study the influence factors of expressway traffic system on vehicle micro-behavior and the mechanism of traffic flow energy consumption. The research process is as follows: The first part introduces the research background of road traffic safety and transportation energy consumption at home and abroad, summarizes the research summary at home and abroad from two aspects of highway traffic safety and transportation energy consumption, and leads to the paper research. The purpose and significance of this paper is to clarify the technical route and main contents of this paper. In the second part, through the study of vehicle type classification of expressway, the mixed traffic flow models of basic sections of expressway are divided into light vehicles and heavy vehicles, and the concept of vehicle type mixing ratio is put forward; through the research of the basic formula of vehicle specific power. Based on the study and discussion, the formula for calculating the specific power of different types of vehicles suitable for mixed traffic flow in basic sections of expressway is determined. The traffic flow characteristics of expressway are analyzed from the three vehicle operation characteristics of free exercise, car-following exercise and overtaking and changing lanes, and the influence of heavy and heavy vehicles on traffic flow is analyzed by using the theory of moving bottleneck. In this part, the main parameters of expressway traffic flow characteristics are discussed and analyzed, and the safety state evaluation system and specific indexes of Expressway mixed traffic flow are established on this basis. The fourth part establishes the mixed traffic flow simulation model based on cellular automata, and improves the initial conditions and evolution rules of the simulation model with the object and main contents of the paper. In the process of analyzing the simulation results, this paper mainly discusses the safety evaluation and energy consumption of Expressway mixed traffic flow under different vehicle mixing ratio from four aspects: traffic flow, density, speed and overtaking lane changing rate. In the aspect of simulation data, through the specific power model of Expressway mixed traffic flow, the influence of different vehicle mixing ratio on traffic flow energy consumption is analyzed. Finally, the research results of this paper are summarized and the future research is prospected.
【學(xué)位授予單位】:蘭州交通大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:U491
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