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本文在采用Ｒａｎｋｉｎｅ涡模型和冻结Ｏｓｅｅｎ涡模型消除Ｋａｒｍａｎ涡街流场的速度奇性后，对Ｋａｒｍａｎ涡街流场进行了拓扑结构分析。证明Ｋａｒｍａｎ涡街流场的自由驻点表现为中心和鞍点。随着空间多数的变化，流动结构可具有三种形式。
In this paper, after using the Rankine vortex model and the frozen Oseen vortex model to eliminate the velocity singularity of the Karman vortex flow field, the topological structure of the Karman vortex flow field is analyzed. The free settlements that prove Karman vortex flow field show center and saddle point. With most changes in space, the flow structure can have three forms.