以交通流O-D网络系统为背景,通过分岔图和相图讨论了在无交通阻塞下的交通费用和交通容量变化下系统非线性动力学行为的变化和运动复杂性。交通费用和交通容量作为交通网络的固有属性,对定性分析交通网络的动力学行为具有至关重要的作用。同时,数值验证了两种计算交通流O-D网络系统分岔图的方法的等价性。 Taking the traffic flow O-D network system as a background, the change of the nonlinear dynamic behavior and the movement complexity of the system under the traffic congestion and traffic capacity without traffic jam are discussed by bifurcation diagram and phase diagram. Traffic costs and traffic capacity, as an intrinsic property of traffic network, play a crucial role in qualitative analysis of traffic network dynamics. At the same time, the equivalence of two methods to calculate the bifurcation diagram of traffic flow O-D network system is verified by numerical simulation.