城市轨道网络抗毁可靠性定义及评价指标模型研究

Definition and Evaluation Modeling of Metro Network Invulnerability

从可靠性理论出发,结合城市轨道网络特点,提出了城市轨道网络系统抗毁可靠性的定义——整个轨道交通网络在受到外界破坏作用后正常运营的能力。将抗毁可靠度定义为抗毁可靠性的度量值。根据网络的拓扑结构及客流分布特点,从运输量分配入手,把从路网中单独隔离出子系统后所影响的客流量作为评价子系统抗毁可靠性的依据,建立子系统抗毁可靠性的评价,并应用矩阵逻辑或运算计算相应的评价指标。在评价子系统抗毁可靠性基础上,提出了5个网络系统抗毁可靠性特征值,从不同角度评价路网系统的抗毁可靠性。最后,用一算例验证了该模型及相应评价指标的可行性和有效性。

A definition of Metro network invulnerability is newly presented according to the reliability theories and the characteristics of Metro network systems. The invulnerability is defined as the ability of the Metro network system to operate normally under the environmental destructions. This study considers the influencing passenger flow volume when a sub-system is insulated from the network as the basis of evaluating the invulnerability of the sub-system. The evaluating model of invulnerability of the sub-system is then proposed on the ba- sis of the network topology and passenger distributions, and the evaluating indices are calculated by fake addition of matrix. In addition, five models for indices of the network invulnerability are put forward to evaluate the invulnerability of the Metro system. A numerical example and its results are provided to demonstrate the feasibility and validity of the proposed model and indices.