级联失效条件下路网修复模型研究与仿真

发布时间：2018-06-25 00:35

本文选题：级联失效 + 双层规划模型　；参考：《计算机仿真》2017年10期

【摘要】：针对传统的路网修复模型未考虑修复时同样会发生级联失效效应,从而降低模型精度的缺陷,建立一种上层以路网阻抗最小为目标,下层为固定起讫点需求的用户均衡配流的双层修复模型,构建路网修复所需资源、路段通行能力、出行路径交通流量等约束条件。设计了改进的粒子群优化算法求解,增加了扰动因子,克服传统算法在处理该问题时收敛速度慢且精度低的缺陷。使其摆脱局部最优解,实现全局最优解。采集相关数据,建立银川市区部分路网拓扑结构模型对提出的修复方法进行求解验证。仿真结果表明,上层以网络阻抗最小为目标,下层为固定起讫点需求的用户均衡配流的双层修复模型的修复结果优于传统模型且收敛速度更快,求解效率更高,为解决实际问题提供了思路。
[Abstract]:In view of the fact that the traditional road network repair model does not consider the repair, the cascade failure effect will also occur, thus reducing the defects of the model precision, a kind of upper layer with the goal of minimum network impedance is established. The lower layer is a two-layer restoration model with fixed end-point demand, which is used to construct the resource needed for road network repair, the capacity of road section, the traffic flow of travel path, and so on. An improved particle swarm optimization algorithm is designed to solve the problem, and the perturbation factor is added to overcome the shortcomings of the traditional algorithm, which is slow convergence and low precision in dealing with the problem. The global optimal solution is realized by getting rid of the local optimal solution. By collecting relevant data and establishing the topological structure model of part of road network in Yinchuan City, the proposed restoration method is solved and verified. The simulation results show that the restoration results of the two-layer restoration model with the minimum network impedance as the target and the lower layer as the fixed starting point demand are better than the traditional model, and the convergence speed is faster and the solution efficiency is higher. It provides the train of thought for solving practical problems.
【作者单位】：宁夏大学机械工程学院;
【基金】：宁夏高等学校科研项目(NGY2015037)
【分类号】：TP18;U491

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