本文選題：偶發(fā)性擁擠 + 交通流控制　； 參考：《西安工業(yè)大學(xué)》2017年碩士論文

【摘要】：偶發(fā)性擁擠是指由于突發(fā)事件的出現(xiàn),導(dǎo)致道路實(shí)際通行能力降低,從而引發(fā)的交通擁擠現(xiàn)象。偶發(fā)性擁擠對交通流有較大影響,研究偶發(fā)性擁擠下的城市道路交通流控制,對提高交通流運(yùn)行效率具有重要的理論意義和實(shí)際價值�，F(xiàn)有偶發(fā)性擁擠下的城市道路交通流控制以花費(fèi)總時間最小、通行能力最大、限制密度為目標(biāo),考慮交通流量、實(shí)際通行能力對交通流進(jìn)行控制。本文針對實(shí)際中發(fā)生偶發(fā)性擁擠時,可通行車道數(shù)減少,實(shí)際通行能力降低,車流密度增加,且考慮偶發(fā)性事故持續(xù)時間對偶發(fā)性擁擠下交通流有影響的情形,研究以通行能力最大為目標(biāo)的城市道路交通流控制。論文的成果如下。基于尖點(diǎn)突變的偶發(fā)性擁擠下城市道路交通流控制。針對偶發(fā)性擁擠的特點(diǎn),運(yùn)用突變理論,以交通運(yùn)行量在承載容量中的占有率為狀態(tài)變量,以車流流量變化率、路段剩余通行能力的變化率為控制變量,構(gòu)建偶發(fā)性擁擠下城市道路交通流尖點(diǎn)突變模型,選擇合適的路阻函數(shù),采用動能函數(shù)對交通流擁擠的臨界狀態(tài)進(jìn)行分析,得到突變臨界交通流量和突變穩(wěn)定交通流量,并給出交通流量限制率對交通流進(jìn)行控制,提出交通流控制方案。以西安市南二環(huán)交通狀況的實(shí)地測量為實(shí)例,分析不同情形下交通流運(yùn)行狀態(tài),說明模型應(yīng)用的有效性。結(jié)果表明,模型可以較好的控制交通流,路阻函數(shù)對結(jié)果有較大影響,就適用范圍而言,本文路阻函數(shù)參數(shù)根據(jù)具體數(shù)據(jù)擬合得到,適用于不同道路類型,更為符合實(shí)際�；谘辔餐蛔兊呐及l(fā)性擁擠下城市道路交通流控制。由于偶發(fā)性事故持續(xù)時間對交通流有較大影響,因此,考慮偶發(fā)性事故持續(xù)時間這個控制因素,以交通運(yùn)行量在承載容量中的占有率為狀態(tài)變量,以車流流量變化率、路段剩余通行能力的變化率、時間變化率為控制變量,構(gòu)建偶發(fā)性擁擠下城市道路交通流燕尾突變模型,分平面對燕尾突變的分叉集進(jìn)行討論,從而對交通流擁擠的臨界狀態(tài)進(jìn)行分析,并給出交通流控制方案。以西安市南二環(huán)交通狀況的實(shí)地測量為實(shí)例,分析不同情形下交通流運(yùn)行狀態(tài),說明模型應(yīng)用的有效性。結(jié)果表明,當(dāng)偶發(fā)性事故持續(xù)時間超過10分鐘時,容易導(dǎo)致交通流突變。
[Abstract]:Accidental congestion is a phenomenon of traffic congestion caused by the occurrence of unexpected events, which leads to the reduction of actual traffic capacity. Accidental congestion has great influence on traffic flow. The study of urban road traffic flow control under accidental congestion has important theoretical and practical value to improve the efficiency of traffic flow. The existing urban road traffic flow control under accidental congestion takes the minimum total time, the largest traffic capacity and the limited density as the goal. Considering the traffic flow, the actual traffic capacity controls the traffic flow. In this paper, when accidental congestion occurs, the number of passable lanes is reduced, the actual capacity is reduced, and the traffic density is increased, and the influence of the duration of accidental accidents on the traffic flow under accidental congestion is considered in this paper. The control of urban road traffic flow with maximum capacity is studied. The results of the paper are as follows. Urban road traffic flow control under accidental congestion based on cusp mutation. In view of the characteristics of accidental congestion, using the catastrophe theory, taking the occupancy of traffic capacity in the carrying capacity as the state variable, the change rate of the traffic flow flow and the change rate of the remaining traffic capacity of the road as the control variable. In this paper, the cusp catastrophe model of urban traffic flow under accidental congestion is constructed, the proper road resistance function is selected, and the critical state of traffic congestion is analyzed by using kinetic energy function, and the catastrophe critical traffic flow and sudden stable traffic flow are obtained. The traffic flow is controlled by the limit rate of traffic flow, and the scheme of traffic flow control is put forward. Taking the field measurement of traffic situation in South second Ring Road of Xi'an City as an example, the traffic flow running state under different conditions is analyzed, and the validity of the application of the model is illustrated. The results show that the model can control the traffic flow well, and the road resistance function has a great influence on the results. In terms of the applicable range, the parameters of the road resistance function are fitted according to the specific data, which are more suitable for different road types and are more in line with the reality. Urban road traffic flow control under accidental congestion based on swallowtail mutation. As the duration of accidental accidents has a great influence on traffic flow, considering the control factor of the duration of accidental accidents, the occupancy of traffic volume in the carrying capacity is taken as the state variable, and the change rate of traffic flow is taken as the state variable. The change rate of residual traffic capacity and the change rate of time are the controlling variables. The catastrophe model of the swallowtail of urban traffic flow under accidental congestion is constructed and the bifurcation set of the abrupt change of the tail is discussed in the plane. The critical state of traffic congestion is analyzed and the traffic flow control scheme is given. Taking the field measurement of traffic situation in South second Ring Road of Xi'an City as an example, the traffic flow running state under different conditions is analyzed, and the validity of the application of the model is illustrated. The results show that when the duration of accidental accidents is longer than 10 minutes, the traffic flow is prone to sudden change.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U491

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本文編號：1853099