基于水波原理的城市突发事件交通影响程度研究
发布时间：2018-08-31 10:50
【摘要】：分析城市突发事件对交通的影响程度,从而采取相应的交通应急对策,具有重要的现实意义.本文借助水波原理,将城市突发事件对交通的影响比拟成往水中扔石头产生的效应.提出了交通影响系数概念,并以此来界定突发事件对交通的影响程度;引入累积交通影响系数概念,利用二重积分构建了累积交通影响系数理论模型,从而评价突发事件对周边路网的综合交通影响程度.选取一起交通事故为例,在对调查数据筛选和整理的基础上,得到了交通影响系数时空分布图;根据交通影响系数随时间和距离的变化曲线特征,利用MATLAB构建了交通影响系数与时间和距离的关系模型;最后计算得到了事故的综合交通影响程度为0.466 7,结果表明该起事故对周边交通的影响较大.
[Abstract]:It is of great practical significance to analyze the impact of urban emergencies on traffic and take corresponding traffic emergency countermeasures. Based on the principle of water wave, this paper compares the impact of urban emergencies on traffic with the effect of throwing stones into the water. This paper puts forward the concept of traffic impact coefficient, and defines the influence degree of unexpected events on traffic, introduces the concept of cumulative traffic impact coefficient, and constructs the theoretical model of cumulative traffic impact coefficient by using double integral. Therefore, the degree of comprehensive traffic impact of unexpected events on the surrounding road network is evaluated. Taking a traffic accident as an example, on the basis of screening and sorting out the investigation data, the time-space distribution map of the traffic impact coefficient is obtained, and according to the characteristics of the changing curve of the traffic impact coefficient with time and distance, The relationship model of traffic influence coefficient with time and distance is constructed by using MATLAB, and the comprehensive traffic influence degree of the accident is 0.466 7. The result shows that the accident has great influence on the surrounding traffic.
【作者单位】： 武汉科技大学汽车与交通工程学院;
【基金】：国家自然科学基金(51408445,61403286)~~
【分类号】：U491
[Abstract]:It is of great practical significance to analyze the impact of urban emergencies on traffic and take corresponding traffic emergency countermeasures. Based on the principle of water wave, this paper compares the impact of urban emergencies on traffic with the effect of throwing stones into the water. This paper puts forward the concept of traffic impact coefficient, and defines the influence degree of unexpected events on traffic, introduces the concept of cumulative traffic impact coefficient, and constructs the theoretical model of cumulative traffic impact coefficient by using double integral. Therefore, the degree of comprehensive traffic impact of unexpected events on the surrounding road network is evaluated. Taking a traffic accident as an example, on the basis of screening and sorting out the investigation data, the time-space distribution map of the traffic impact coefficient is obtained, and according to the characteristics of the changing curve of the traffic impact coefficient with time and distance, The relationship model of traffic influence coefficient with time and distance is constructed by using MATLAB, and the comprehensive traffic influence degree of the accident is 0.466 7. The result shows that the accident has great influence on the surrounding traffic.
【作者单位】： 武汉科技大学汽车与交通工程学院;
【基金】：国家自然科学基金(51408445,61403286)~~
【分类号】：U491
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