接駁地鐵的社區(qū)公交微循環(huán)系統(tǒng)優(yōu)化研究
[Abstract]:Subway, as the backbone of urban public transport, has many advantages, such as high speed and high reliability, and has become one of the main travel modes of urban residents. Community bus has the characteristics of mobility and flexibility, which can make up for the shortcomings of poor accessibility of subway line network and unable to provide door-to-door service in public transport system. This paper aims to provide theoretical support for the design of optimized microcirculation system of community bus connecting with subway, aiming at facilitating passengers to reach subway stations and reducing passengers by optimizing community bus routes, cooperative timetables and flexible bus based on demand-response. The main work and innovations of this paper are summarized as follows: (1) Two types of community bus routing optimization models are constructed. The first model is based on the real road network, and the potential demand index is defined for the road segment, and the maximization is achieved. The second model is based on the semi-realistic road network and aims at minimizing the total cost (passenger travel cost and enterprise cost). In the model, a heuristic algorithm for site layout and an optimal heuristic interval algorithm are nested. First, the Depth-first Search (DFS) algorithm is designed to traverse all feasible solutions. Then an improved genetic algorithm (GA) is designed to solve the two types of problems, and the two algorithms are verified by relevant examples and examples. The results show that GA is feasible and efficient in solving this problem. At the same time, the effects of line length and maximum allowable walking distance on the related costs and departure intervals are analyzed in depth. (2) The passenger travel costs (planned delay costs and transfer costs) are taken into account when the number of vehicles and the size of the fleet are given. A cooperative timetable optimization model is established based on the scaling function, and two kinds of constraints, i.e. vehicle load capacity constraints and vehicle size constraints, are considered simultaneously. Firstly, GA is used to solve the problem. Then, a Frank-Wolfe algorithm combined with a Heuristic algorithm of Shifting Departure Times (FW-SDT) is designed to solve the problem. The two algorithms are verified by relevant examples and case analysis. The data experiment and sensitivity analysis show that FW-SDT is superior to GA in solving efficiency, accuracy and stability. (3) Considering a more flexible form of public transport based on Demand-Responsive Transit (DRT), FW-SDT is introduced into the design of community public transport system connected with subway. In the aspect of modeling, the objective is to minimize the total cost (operation cost and passenger in-vehicle cost), and the practical constraints such as service time window, passenger in-vehicle time, vehicle load and vehicle maximum travel time are considered. Variable Neighborhood Search based Simulated Annealing (VNS-SA). To verify the two algorithms, a numerical experiment based on real road network is designed. In order to make a reasonable trade-off between the optimization results and the computational efficiency, different algorithms and combinations of internal algorithms are applied to the numerical experiment, and the results are compared with each other. The related results are compared and analyzed.
【學(xué)位授予單位】:北京交通大學(xué)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2015
【分類號(hào)】:U491.17
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