基于单元重要性分析的公路网络布局方案优化

Layout Scheme Optimization of Road Network Based on the Component Importance Analysis

为了有效改善路网运行状态,借鉴网络可靠性分析方法,对路网进行了畅通可靠性分析;针对路网可选 规划方案过多的问题,通过单元重要性分析,确定数量合理的公路网新建或改建备选方案集合,并以路网综合效 益最大为目标,建立公路网络规划方案优化的模型;利用枚举法等离散优化方法,确定最优公路网规划方案.通 过实例计算证明,利用本文提出的模型及方法可以得到合理的路网布局优化方案.

Based on the reliability theory, this paper presents the concept of unblocked reliability to evaluate highway network performance. Aimed at the problem of too many optional schemes in the road network plan, the node connective importance and road unit importance are analyzed to decrease the number of optional layout scheme and road degree schemes. Using the integrated benefit of the road system as optimization objective, the optimum model of highway network planning is built. Through the enumeration method, the optimum plan can be found. Then, an example is given to illuminate the practicability and maneuverability of the optimum model and solution for highway network planning.