为给城市公交系统的规划、建设和管理优化提供决策依据，在现有公交网络模型的基础 上，以常规公交线路为网络的节点，公交线路间的若干个公共停靠站点为连边，建立了基于耦合 映像格子的多重边复杂公交线路网络模型，基于该模型研究了多重边复杂公交线路网络的相继故 障问题。通过Matlab 数值仿真技术，详细分析了扰动幅值和耦合强度对网络相继故障的影响。研 究结果表明：蓄意攻击多重边复杂公交线路网络中度最大的节点最容易造成网络全局故障；另 外，耦合强度和扰动幅值越大，多重边复杂公交线路网络越容易发生相继故障。

In order to provide decision basis for the planning, construction, management and optimiza⁃ tion of urban public transit system, on the basis of the existing public transit network model, a complex public transit network model with multi-links was established based on Coupled Map Lattice. The model took bus lines as the network nodes, and the same bus stops among bus lines as the network links. The cascading failures were investigated using this model. The cascading failures under the different external perturbations and different coupling strengths were analyzed through Matlab simulation. The results indi⁃ cate that deliberate attack on the node with the largest degree of the public traffic network with multilinks is most likely to cause the global failure. In addition, the greater the coupling strength and external perturbation of the networkare, the easier cascading failures occur.