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基于元胞自動機的非機動車流微觀仿真研究

發(fā)布時間:2019-01-17 20:58
【摘要】:我國的城市化進程不斷的深入發(fā)展,交通需求量也隨之大幅度增加,致使城市車輛的保有量逐年提高,經常出現機非機動車在同一道路上行駛的情況。許多城市針對這個問題設置了具有物理隔離帶的非機動車道,其作為城市中慢行交通網絡不可缺少的構成部分,這使得如何提高其道路服務水平變得非常有意義。為了減輕城市停車的壓力,更有一些非機動車道上面被設置了機動車的停車帶,致使機動車會不間斷駛入非機動車道進行停車行為,機非混合交通流因此就形成了。這進一步加劇了非機動車道上交通的混亂狀況,導致交通事故頻繁發(fā)生,直接造成城市交通路網通行能力的降低。所以本文建立符合實際的交通流模型來研究不同情況下的非機動車流交通特性,并且運用相應模型為改善交通擁堵做了一些基礎性的工作,具有十分重要的意義。本文主要研究內容如下:(1)先是綜述元胞自動機簡要的發(fā)展歷程以及一些基本要素,然后簡單對元胞自動機運用于交通流領域的若干個經典模型做了介紹,并且進一步分析了交通流三要素和其相互關系。(2)運用了實驗室已有的相關實驗設配和數據資源,并且結合實地調研。在此基礎上,從車輛的物理特性、車輛騎行行為特性、騎行人員的特性三個方面,分別對混合交通中的非機動車與機動車的交通特性進行了深入研究。(3)針對我國中小城市中非機動車流的構成體系發(fā)生了顯著變化,電動三輪車和電動自行車的保有量逐年提高。針對車輛的實際尺寸和駕駛特性的差異,在STNS模型的基礎上,考慮前車速度效應,建立多車道混合非機動車元胞自動機模型。并使用計算機對該模型進行模擬仿真,取得在特定電動三輪車比例、慢化概率、換道概率下的基本圖。最后通過與實際數據進行對比分析證明了該模型的可用于描述和分析實際道路交通。(4)針對許多城市非機動專用道上都設有機動車的停車區(qū)域,為了研究這種路內停車行為對于非機動車流產生的影響。本文將適用于兩輪車的EBCA1模型與適用于機動車的SDNS模型進行耦合,最終建立適用于機非混合車流的CA模型。通過計算機在設有兩種不同停車帶的環(huán)境下對機動車進入路邊停車位的行為進行仿真,分別分析了機各種條件下機動車的停車行為對交通流的影響。并且將仿真數據與實際數據進行對比分析,驗證了模型的實用性,最后運用該模型提出了是否能夠設置非機動車道路內停車帶的道路交通流的標準值。
[Abstract]:With the continuous development of urbanization in our country, the traffic demand increases greatly, which leads to the increase of urban vehicle ownership year by year, which often occurs when non-motor vehicles travel on the same road. Many cities have set up non-motorized lanes with physical separation zone, which is an indispensable component of slow traffic network in cities, which makes it very meaningful to improve the level of road service. In order to reduce the pressure of urban parking, some non-motorized lanes are provided with the parking belt of the motor vehicle, which causes the vehicle to drive into the non-motorized lane without interruption to stop, so the non-mixed traffic flow is formed. This further exacerbates the traffic chaos in non-motorized lanes, which leads to frequent traffic accidents, which directly reduces the capacity of urban traffic network. So this paper establishes the traffic flow model which is in line with the actual situation to study the traffic characteristics of non-motor vehicle flow under different conditions, and uses the corresponding model to do some basic work to improve traffic congestion, which has very important significance. The main contents of this paper are as follows: (1) firstly, the brief development of cellular automata and some basic elements are reviewed, and then several classical models of cellular automata applied in traffic flow field are briefly introduced. Furthermore, the three elements of traffic flow and their relationships are analyzed. (2) the related experimental settings and data resources are used in the laboratory, and combined with field research. On this basis, from three aspects of the physical characteristics of the vehicle, the characteristics of the vehicle riding behavior, the characteristics of cyclists, The traffic characteristics of non-motor vehicles and motor vehicles in mixed traffic are studied respectively. (3) the composition system of non-motor vehicle flow in small and medium-sized cities in China has changed significantly. The number of electric tricycles and electric bicycles has increased year by year. In view of the difference of the actual size and driving characteristics of the vehicle, the cellular automata model of multi-lane hybrid non-motor vehicle is established on the basis of the STNS model and considering the velocity effect of the vehicle in front of the vehicle. The computer is used to simulate the model, and the basic diagram is obtained under the specific electric tricycle proportion, the probability of slowing down and the probability of changing lanes. Finally, it is proved that the model can be used to describe and analyze the actual road traffic by comparing with the actual data. (4) there are parking areas for motor vehicles on non-motorized special roads in many cities. In order to study the effect of the on-street parking behavior on the flow of non-motor vehicles. In this paper, the EBCA1 model for two-wheeled vehicle is coupled with the SDNS model for motor vehicle, and finally the CA model for non-hybrid vehicle flow is established. The behavior of vehicle entering the roadside parking space is simulated by computer in the environment with two different parking bands, and the influence of the parking behavior of motor vehicle on traffic flow under various conditions is analyzed respectively. The simulation data and the actual data are compared and analyzed to verify the practicability of the model. Finally, the standard value of the road traffic flow with non-motorized lane parking belt can be set up by using the model.
【學位授予單位】:江西理工大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:U491

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